Hydrostop Premium Coat Liquid Applied Roofing Manual
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HYDROSTOP®
PREMIUMCOAT®
LIQUID-APPLIED
ROOFING
Application &
Specifications
Manual
Version 1.2
Table of Contents
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
1
Secon 1: Guides
Secon 2: Substrate Preparaon
General Substrate Condions.............................................................................................................11
Moisture Survey.................................................................................................................................12
Repair
Damaged Substrate Treatment: Metal.....................................................................................13
Damaged Substrate Treatment: Non-Metal............................................................................14
Cleaning Procedures
Treatment..............................................................................................................................16
General Substrate Preparaon
Metal.......................................................................................................................................17
TPO..........................................................................
.....
.................
...........
..............................20
PVC & Hypalon®.................................................
.......
..............................................................21
EPDM.......................................................
...........
....................................................................22
Smooth & Granulated Asphalc..............................................................................................23
Structural Concrete..............
.............
.......................................................................................24
Adhesion Tesng
Test Method #1: Test Patches..................................................................................................25
Test Method #2: Field Peel Adhesion (Alternate to Test Patches)...........................................26
HydroStop® PremiumCoat®
Liquid-Applied Roong Applicaon & Specicaons Manual
Welcome...............................................................................................................................................3
Product Guide......................................................................................................................................6
Cleaner & Primer Guide........................................................................................................................7
Seam Treatment Guide......................................
.............
......................................................................8
Warranty Guide.....................................................................................................................................9
Substrate
Conditions
Overview............................................................................................................................................41
General Care & Preventave Maintenance Recommendaons.......................................................41
Semi-Annual Inspecons & Maintenance.........................................................................................43
Inspecon Checklist............................................................
............
...................................................45
Roof Specic Leak Invesgaon........................................................................................................46
Emergency Repairs.............................................................................................................................46
Roof Alteraons.................................................................................
.....
...........................................47
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
2
Secon 4: Care & Preventave Maintenance
HydroStop® PremiumCoat®..........................................
.........
.........
........
...........................................49
HS-101 Typical Metal Roof Joint Detail....................................................................................50
HS-102 Secon at Vercal Panel Seam.................................................
......
............................51
HS-104 Deck Joint Stripping Detail..........................................................................................52
HS-201 Standard Drip Edge Detail...........................................................................................53
HS-202 Guer with Standard Drip Edge Detail........................................................................54
HS-203 Concrete Roof Deck Edge Detail..................................................................................55
HS-300 Alternate Wall Flashing Detail..............................................................
........
..............56
HS-301 Wall Flashing Detail.....................................................................................................57
HS-302 Drip Edge Parapet Wall Detail.....................................................................................58
HS-303 Typical Roof Cant At Corner........................................................................................59
HS-304 Typical Equipment Curb Flashing Detail.....................................................................60
HS-305 Scupper Detail.............................................................................................................61
HS-401 Curb to Curb Expansion Joint Flashing Detail.............................................................62
HS-502 Vent-Pipe Flashing Detail............................................................................................63
HS-503 Vent-Stack Flashing Detail...........................................................................................64
HS-504 Standard Roof Drain Detail..........................................................................................65
HS-505 Exhaust Fan (for Cooking) Flashing Detail...................................................................66
Secon 5: Architectural Detail Drawings
Secon 3: Quick Spec Directory
HydroStop® PremiumCoat®...........................................................
........
...........................................28
Metal.......................................................................................................................................29
Smooth & Granulated Asphalc.............................................................................................30
TPO....................................
........................
............................................................................31
PVC....................................
........................
............................................................................32
Hypalon®................................................................................................................................33
EPDM....................................
...............
...................................................................................34
Structural Concrete.................................................................................................................35
Corrugated Structural Transite Panels....................................................................................36
Polyisocyanurate (ISO)...........................
...........
..........
........
......................
.
....
.......................37
Gypsum (DensDeck & SecuRock)......................................................
..
...
.........
.......................38
Warranty Extension/Renewal.......................................................................
........
..................39
Welcome
ABOUT GAF
As North America’s largest roong manufacturer, GAF proudly oers a comprehensive porolio of
award-winning, innovave roong products for both residenal and commercial properes. Supported
by an extensive naonal network of factory-cered contractors, GAF has built its reputaon—and its
success—on its steadfast commitment to Advanced Quality, Industry Experse, and Soluons Made
Simple.
GAF oers all major low-slope roong technologies, including repair and maintenance products and
roof restoraon systems, as well as new roong systems (BUR, modied bitumen, TPO, PVC, and
liquid-applied systems). GAF has developed low slope roong systems with excellent durability and
high reecvity to meet the most rigorous industry standards while helping commercial property
owners and designers reduce energy consumpon.
For more informaon about GAF, visit us at www.gaf.com.
SERVICES
•
Every GAF roofing product benefits from the substantial resources available only from a
multibillion-dollar corporation dedicated to roofing. Our 31 plants mean manufacturing
expertise. Our extensive R&D organization means a constant focus on product and process
improvement. GAF is a team of over 3,000 people dedicated to your roofing satisfaction.
•
GAF has a network of sales representatives and distributors to supply and service its quality
roofing systems throughout North America.
•
Our Technical Helpline is a technical assistance service that allows you to contact us directly to
speak with a technical representative about specifications, applications, code approvals, and
product information. The Helpline number is 1-800-ROOF-411 (1-800-766-3411).
•
Architectural Information Services (AIS) is a specification service that allows you to specify your
exact roofing needs and we will send you a general specification that outlines your job summary,
application method, product description, and detail drawings based on the information you
provided. The phone number for AIS is 1-800-522-9224.
•
Our Tapered Design Group (TDG) is one of the many services available to our customers to help
reduce their hassles. We provide tapered insulation take-offs for architects, contractors, and
distributors nationwide. Just send your roof plans and specifications to tdg@gaf.com. The phone
number for TDG is 1-800-766-3411.
•
Visit GAF on the web at www.gaf.com for extensive product information, specifications, and
technical literature.
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
3
Thank you for consulng Version 1.2 of the HydroStop® PremiumCoat® Liquid-Applied Roong
Applicaon & Specicaons Manual. This Manual contains the latest information relating to the
application of GAF’s HydroStop® PremiumCoat® liquid-applied roofing systems, and is based on our
years of experience in the commercial roofing field. It has been prepared as a general guide to assist
architects, engineers, roofing contractors, and owners in the use of our liquid-applied roofing systems.
You can nd further informaon at www.gaf.com, or contact GAF Technical Services at 1-800-ROOF-
411 (1-800-766-3411).
Welcome
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
4
DISCLAIMER
•
GAF manufactures and sells roofing materials and does NOT practice architecture or
engineering. GAF is NOT responsible for the performance of its products when damage to its
products is caused by such things as improper building design, construction flaws, or defects in
workmanship.
•
The design responsibility remains with the architect, engineer, roofing contractor, or owner, and
construction details illustrated and described herein are furnished solely for guidance purposes.
These guidelines should not be construed as being all-inclusive, nor should they be considered as
a substitute for good application practices.
•
Under no circumstances does GAF have any liability for costs or expenses arising out of or
associated with the pre-existing presence of asbestos-containing materials or any other allegedly
hazardous substances or materials on the roof to which the new GAF roofing materials are being
applied.
•
Information contained in this Manual is presented in good faith and, to the best of GAF’s
knowledge, does not infringe upon any patents, foreign or domestic.
•
As a part of its continuing efforts to improve the performance of its products, GAF periodically
makes changes to its products and application specifications. GAF reserves the right to change
or modify, at its discretion, any of the information, requirements, specifications, or policies
contained herein. This Manual supersedes all catalogs and previous Manuals.
HOW TO DETERMINE IF A ROOF IS A GOOD CANDIDATE FOR COATING
When installed on a new roof, a roof coating should:
• Be a component part of the larger warranted roofing system. This will ensure compatibility with the
system and enhance overall performance of the system.
• Be installed after the roof has weathered as necessary. Weathering periods may vary depending
upon the type of system to which the coating will be applied. Use of a primer may also be required
for certain substrates to ensure adequate adhesion.
When installed on an existing roof, a roof coating should:
• Be compatible with the existing roof.
• Extend the remaining service life of the existing roof. Although a coating cannot add life back to a
roof already beyond its service life, it can prevent a roof from aging as quickly as it would without
the coating.
• Only be applied to a roof that drains properly. Some coatings may be adversely affected by the
presence of ponding water. Therefore, areas of the existing roof that pond water should be
repaired prior to coating.
• Only be applied to non-leaking roofs. While coatings may help seal some pinhole leaks not visible to
the naked eye, they will not generally find and repair existing leaks. Accordingly, existing roof leaks
will need to be identified and repaired prior to coating. (Allow repairs to fully dry prior to coating.)
NOTE: When coating over an existing roof coating or an existing coal tar pitch roof, contact GAF
Technical Services at 1-800-ROOF-411 (1-800-766-3411).
GENERAL DESIGN CONSIDERATIONS
Guides
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
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Section 1
Guides
Guides
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
6
Product Guide
Type Product Descripon Base/Cure VOC
(g/L)
% Solids by
Volume
Primers & Cleaner
Acrylex 400 Primer Water-Based Acrylic Rust-Inhibing Primer For Metal Water-Based <50 36
Adhere-It® II Primer Water-Based Rinsable Primer For EPDM Water-Based n/a n/a
CleanAct Rinsable Primer Water-Based Rinsable Primer For EPDM Water-Based n/a n/a
Epoxy Primer (formerly Uniseal Primer) Water-Based Epoxy Primer For Concrete and Porous Substrates Water-Based <120 10
Lock-Down Primer Moisture-Cure Urethane Primer For Corrosion Protecon On Metal
Surfaces Moisture-Cure <420 55
StableRust Primer Water-Based Acrylic Rust-Inhibing Primer Water-Based <200 56
SureBond Primer Water-Based Acrylic Primer For Chalky Surfaces Water-Based <200 23
TPO Red Primer Solvent-Based Primer For TPO Roofs Solvent-Based <50 1
UniBase Primer Water-Based Acrylic Penetrang Primer And Asphalt Bleed Blocker Water-Based <50 40
XR-2000 Primer Water-Based Acrylic Primer For Kynar Coated Metal Water-Based < 170 40
United Cleaning Concentrate (UCC) Water-Based Roof, Wall and Deck Surface Cleaner Water-Based n/a n/a
Roof
Coangs
HydroStop® BarrierGuard® Waterproong Primer For Concrete and Waterproong Water-Based <50 39
HydroStop® PremiumCoat®Finish Coat Water-Based Acrylic Top Coat Water-Based <50 52
HydroStop® PremiumCoat® Foundaon Coat Water-Based Acrylic Base Coat Water-Based <50 52
Flashing, Sealants &
Accessories
FlexSeal™ Caulk Grade Sealant Elastomeric Sealant Solvent-Based <300 n/a
FlexSeal™ Sealant Self-Leveling Elastomeric Sealant Solvent-Based <300 66
HydroStop® PremiumCoat® Buer Grade Flashing Water-Based Acrylic Flashing Water-Based <50 58
HydroStop® PremiumCoat® Fabric Stch-Bonded Polyester Reinforcement n/a n/a n/a
United Coangs™ UniCap Fastener Cover Self-Adhering Butyl Aluminum Caps For Fasteners n/a n/a n/a
HydroStop® Hydrober Bulking Agent Glass Fiber Bulking Agent n/a n/a n/a
United Coangs™ UniTape Seam Tape Self-Adhering Butyl Non-Woven Polyethylene Seam Tape n/a n/a n/a
Guides
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
7
Cleaner & Primer Guide
*United Cleaning Concentrate required
NOTE: Exisng silicone coang is not an acceptable substrate for HydroStop® PremiumCoat®.
Substrate Cleaner* Primer Applicaon Rates
Metal
Rusty Metal YES
Acrylex 400 0.33-0.67 gal /100 sf
(1.4-2.7 L / 10 sq m)
or StableRust 0.33-0.50 gal / 100 sf
(1.4-2 L / 10 sq m)
Severe Rusty Metal YES Lock-Down Primer 0.25 gal /100 sf
(1 L / 10 sq m)
Kynar Coated Metal YES XR-2000 0.75 gal /100 sf
(3.1 L / 10 sq m)
Residual Asphalt YES UniBase 0.50-1.0 gal /100sf
(2-4 L / 10 sq m)
Asphalc
(BUR, SBS,
APP)
Smooth Asphalc YES UniBase 0.50-1.0 gal /100sf
(2-4 L / 10 sq m)
Granulated Asphalc YES UniBase 0.50-1.0 gal /100sf
(2-4 L / 10 sq m)
Single-Ply
TPO (new or aged) YES TPO Red Primer 0.50 gal/100 sf
(2 L / 10 sq m)
PVC (aged) YES No Primer n/a
Hypalon (aged) YES No Primer n/a
EPDM NO Adhere-It II
(or CleanAct)
0.2 gal/100sf
(0.8 L / sq m)
Other
Structural Concrete YES
Epoxy Primer 0.33 gal/sq
(1.4 L/10 m2)
or BarrierGuard 0.5-1.0 gal/sq;
(1.9 L-3.8 L/10 m2)
Gypsum (DensDeck & SecuRock) NO No Primer n/a
Polyisocyanurate (ISO) NO No Primer n/a
Exisng Acrylic Coang YES No Primer n/a
Corrugated Structural
Transite Panels YES Epoxy Primer 0.33 gal/sq
(1.4 L/10 m2)
Guides
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
8
Seam Treatment Guide
Substrate Treatment
Metal
Vercal Seams
Ribbed Seam
Buer Grade Flashing
Standing Seam
Standing “T” Seam
Inverted “J” Seam
Corrugated Seam
Baen Seam
Horizontal Seams Buer Grade w/Fabric or
Foundaon Coat w/Fabric
Single-Ply
(if loose or split)
TPO No Treatment
PVC No Treatment
Hypalon No Treatment
EPDM No Treatment
Asphalc
(if loose or split)
Smooth Asphalc No Treatment
Granulated Asphalc No Treatment
Other
Structural Concrete
(non-structural cracks) No Treatment
Polyisocyanurate (ISO) Buer Grade w/Fabric or
Foundaon Coat w/Fabric
Gypsum (DensDeck & SecuRock) Buer Grade w/Fabric or
Foundaon Coat w/Fabric
Corrugated Structural Transite Panels No Treatment
Re-Cover
Assemblies
Contact GAF Technical Services at 1-800-766-3411
Guides
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
9
Warranty Guide
NOTES:
1. Liquid-Applied Emerald Pledge™ and Diamond Pledge™ must be applied per specicaons.
2. Pre-Approval required for all 20 year Warranes by Director or above (Sales or Field Services).
Emerald Pledge™1Diamond Pledge™1
10 yr 15 yr 20 yr210 yr 15 yr 20 yr2
HYDROSTOP: Who can oer Warranty?
Authorized Contractors No No
Master & Master Select Contractors Yes No No No
Premium Contractors Yes Yes
Requirements
Moisture Survey for non-metal roofs Yes Yes
Pre-Inspecon/Approval Yes, for jobs over 20,000 sq. .
(1,858 sq m)
Yes, for jobs over 20,000 sq. .
(1,858 sq m)
Interim Inspecon Yes, for jobs over 10,000 sq. .
(929 sq m) Yes
Final Inspecon Yes Yes
Maintenance Program Yes Yes
Transferable No Yes
Warranty Registraon Yes Yes
Coverage
Manufacturing Defects Yes Yes
Ordinary Wear & Tear Yes Yes
Workmanship No Yes
Remedy
Materials Yes Yes
Labor Yes Yes
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
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Section 2
Substrate Preparation
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
11
PROPER PREPARATION FOR ROOF TYPES
To ensure proper coang applicaon, the exisng roof membrane must be thoroughly cleaned. All
dust, chalking lm, bitumen exudate, greases or oils, and other loose debris should be removed
prior to coang. Be careful when pressure washing to preserve the integrity of the exisng roof
membrane and to avoid damage to membrane seams (especially adhered seams). Allow the roof to
dry completely prior to coang. Any required roof or ashing repairs should be completed and allowed
to adequately cure where necessary. Refer to specic secons of this Manual for more informaon on
roof preparaon.
Depending on type of exisng substrate and the coang to be applied, use of a primer may be
required. Surfaces which typically require primer include: metal ashings, gravel stops, and other
metal edging; concrete roof decks, masonry walls and other oor surfaces, and other porous surfaces.
Refer to specic secons of this Manual for detailed requirements.
While rusted metal roofs can be coated, addional measures may be required. If the roof is aected by
“white rust” (i.e., zinc or aluminum), it can be coated aer cleaning. However, if the roof is aected by
“red rust,” the rust must either be removed or treated with corrosion inhibing primer. Addionally, all
rusted fasteners should also be removed or treated with a corrosion inhibing primer.
GENERAL SUBSTRATE CONDITIONS
Preparaon of the roof substrate is the responsibility of the installer, who must address and correct all
of the condions listed in this secon.
• Examine substrates to receive new roong. If any quesons arise regarding the compability of
HydroStop® PremiumCoat® liquid-applied roofing products with an exisng substrate, Installer
shall prepare test patches to check adhesion.
• Do not proceed with the installaon of the HydroStop® PremiumCoat® liquid-applied roofing
system unl compability and adhesion of HydroStop® PremiumCoat® roofing system has been
veried by test patches and other preparatory work has been completed and unsasfactory
condions have been corrected.
• Roof must have posive drainage. Substrate should not pond water for more than 48 hours aer
precipitaon stops.
•
GAF denes “ponding” as water that does not drain or dissipate from the roof surface within
48 hours aer precipitaon ends. Ponding can also result from other water sources, including
improperly piped air condioning condensate and steam condensate lines.
• Protect adjacent surfaces that will not be coated.
• Do not apply liquid-applied roong products to surfaces unacceptable to GAF, or under inclement
environmental condions.
• Substrates must be clean, completely dry, and free of any debris before applicaon of any liquid-
applied products.
• HydroStop® PremiumCoat® liquid-applied roofing products should not be used on heavy-trac
bearing substrates. If foot trac is expected, a rooop walkway system approved by GAF must be
used.
Always contact GAF’s Technical Services Department (800-766-3411) for quesons regarding suitable
substrates, materials for test patches, or if you require addional informaon.
WHAT IS BENEATH THE EXISTING ROOF SURFACE?
In membrane roof systems, there is typically a layer of insulation beneath the membrane. If the
roof has ever experienced leaks, it is possible that there are areas of wet insulation in the existing
roofing system. All wet roof insulation must be removed and replaced prior to coating. While certain
areas of wet insulation may be noticeable simply by walking on them, an infrared moisture scan is
recommended to more accurately determine areas of wet insulation.
Metal roofs are typically installed over a solid roof deck or over purlins and insulation. Examining the
underside of the roof deck can reveal areas of wet insulation, deteriorated deck or other damage that
needs to be repaired prior to coating.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
12
MOISTURE SURVEY
It is the responsibility of the roong contractor to determine the suitability of any substrate to
receive a liquid-applied coang system. Roof moisture surveys are a common tool used to assist with
this determinaon. When the deck/substrate has more potenal to “hold” water, a moisture survey
may be required by GAF.
Alternately, for decks/substrates such as steel, the use of roof cuts to verify the suitability of the
substrate can be eecve.
Where a moisture survey is performed:
• GAF requires a moisture survey be conducted by the roong contractor prior to warranty
issuance for Emerald Pledge™ and Diamond Pledge™ Guaranteed Systems installed over exisng
roofs.
• If the moisture survey shows areas of the roof that are wet, remove and replace all wet areas
with new materials. Make typical repairs with original roof technology and follow the appropriate
surface preparaon steps.
• Moisture surveys include: IR scans, nuclear scans, test/core cuts, and portable devices used to
indicate moisture.
* Without signicant ponding water. Minimum of (3) three roof cuts for the rst 100 squares (929 sq m) and (1) one
test cut per addional 100 squares (929 sq m) are required to verify exisng roof condions are acceptable and/or to
determine where moisture is present.
**For lightweight insulang concrete decks, please contact GAF Technical Services at 800-766-3411.
† Roof moisture surveys are not required/recommended for any system installed over an exisng standing seam metal
roof or when the liquid-applied roong system is applied directly to an approved deck (not as a recover system).
Emerald™ Pledge & Diamond Pledge™ Guaranteed Systems
Project Size Less than 100 Sqs. (929 sq m) 100 Sqs. (929 sq m) or Greater
Roof Survey Criteria Roof Surveys Recommended Roof Surveys Recommended Roof Surveys Required
Deck/Substrate
(non-standing seam metal†)
All*
•
Steel*
•
Wood*
•
Cemenous Wood Fiber
(Tectum or equivalent)*
•
Gypsum*
•
Structural Concrete
•
Lightweight Insulang
Concrete**
•
Exisng Spray Polyurethane
Foam
•
Any exisng system with a vapor
retarder
•
Any exisng system that is a
recover system
•
Any exisng system with
signicant ponding water (e.g.
poor drainage)
Liquid-Applied Limited Warranty
Project Size Any Project Size
Roof Survey Criteria Roof Surveys Recommended*
Liquid-Applied Roong Systems
Roof Moisture Survey Criteria
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
13
REPAIR
Inspect and make all necessary repairs to damaged substrates. Refer to the Damaged Substrate
Treatment secons below for substrate-specic informaon.
Damaged Substrate Treatment: Metal
Areas of Concern Treatment
Rust Areas
•
Severely damaged or rusted seams and/or fasteners must be replaced.
Roof panels that are corroded to the point where they have holes must be
replaced.
•
Light rust areas must be treated to prevent further deterioraon on metal
panels. Roof surface shall have no more than 20% rust or must have
panels replaced.
Fasteners
•
All fasteners must be reghtened, secured, or replaced as necessary. All
stripped fasteners must be replaced with new larger fasteners.
•
All deteriorated and missing fasteners must be replaced. All fasteners
must be fully encapsulated with HydroStop® PremiumCoat® Buer Grade
Flashing or fastened with UniCap Fastener Covers (refer to the Product
Data Sheet for specic applicaon requirements).
Dented / Damaged Panels
•
Dents must be mechanically removed to the maximum extent possible.
•
Cover broken rib area with a sheet metal cap and seal with HydroStop®
PremiumCoat® Buer Grade Flashing prior to aaching the cap with
fasteners.
•
Severely damaged roof panels must be replaced.
Excessive Gaps
•
Seal cracks, joints, penetraons, and curbs with appropriate sealant
materials as recommended.
Seams
•
Repair all seams as needed. Refer to the Seam Treatment secon in this
Manual for specic seam treatment guidance.
Open Ridge Vents
•
Replace or install sheet metal caps over the open ridge vents when they
are rusted on the inside and/or located in a harsh environment (e.g., salt
water areas).
•
Do not seal weep holes on vents.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
14
Damaged Substrate Treatment: Non-Metal
Substrate Treatment
TPO
•
Any areas where TPO has torn, cracked, and/or buckled, or where
scrim is exposed must be repaired using similar compable materials
to the current roof.
•
Any wet insulaon must be replaced.
•
Allow at least 48 hours drying me aer the cleaning process before
applicaon of HydroStop® PremiumCoat® liquid-applied products.
PVC or Hypalon®
•
Any areas where PVC or Hypalon has torn, cracked, and/or buckled,
or where scrim is exposed must be repaired using similar compable
materials to the current roof.
•
Any wet insulaon must be replaced.
•
Allow at least 48 hours drying me aer the cleaning process before
applicaon of HydroStop® PremiumCoat® liquid-applied products.
Spray Polyurethane Foam
•
All areas where the urethane foam has degraded must be scaried
and re-foamed to bring substrate to a smooth, workable surface.
•
Any areas where foam has become wet must be removed and re-
foamed.
EPDM
•
Any areas where EPDM has torn, cracked, and/or buckled must be
repaired using similar compable materials to the current roof.
•
Any wet insulaon must be replaced.
•
Allow at least 48 hours drying me aer the cleaning process before
applicaon of HydroStop® PremiumCoat® liquid-applied products.
Mineral & Granule Surfaced BUR or
Modied Bitumen (SBS & APP)
OR
Smooth Surfaced BUR or Modied
Bitumen (SBS & APP)
•
Any areas where asphalc membrane has blistered, buckled, become
wet and/or otherwise been damaged must be removed and repaired
using similar compable materials to the current roof.
•
New BUR or modied bitumen repair materials must be allowed to
weather at least 30 days before applying liquid-applied products to
repaired areas.
•
All areas where BUR or modied bitumen surface have signicantly
cracked (gaps 1/16” [1.6 mm] or greater in width and/or depth) must
be repaired using ashing grade coang to create a smooth, workable
surface on the substrate.
•
Allow ashing grade coang at least 24 hours drying me before
applicaon of HydroStop® PremiumCoat® liquid-applied products.
Areas with thicker applicaons may require addional drying me.
•
Gravel-surfaced BUR or modied bitumen roong systems are not
a suitable substrate to receive a HydroStop® PremiumCoat® liquid-
applied coang.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
15
Damaged Substrate Treatment: Non-Metal (Cont’d.)
Substrate Treatment
Corrugated Structural
Transite Panels
•
All large or excessive gaps (greater than 1/4” [6 mm]) exisng between
roof panels must be lled or made ush with closed-cell foam strips or
polyurethane foam to pre-ll voids.
•
All fasteners must be reghtened, secured, or replaced as necessary. All
stripped fasteners must be replaced with larger fasteners.
•
All deteriorated or missing fasteners must be replaced. All fasteners must
be fully encapsulated with HydroStop® PremiumCoat® Buer Grade
Flashing or fastened with UniCap Fastener Covers.
•
Repair all horizontal seams as needed. Refer to the Seam Treatment
secon in this Manual for specic seam treatment guidance.
•
Many of these panels can contain asbestos. Refer to the Environmental
Consideraons in the Cleaning Procedures secon in this Manual for
further informaon.
Structural Concrete
•
All large or excessive gaps (greater than 1/4” [6 mm]) must be repaired
using high-quality concrete grout. Grout must fully cure before applicaon
of HydroStop® PremiumCoat® liquid-applied coang system.
•
Correct areas of ponding water.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
16
CLEANING PROCEDURES
Note: Under no circumstances does GAF have any liability for expenses arising out of or associated with the
presence of asbestos-containing materials or any other allegedly hazardous substances or materials on the roof to
which the new GAF roong materials are being applied.
Treatment
General Surface Prep
•
Clean and prepare surfaces to receive liquid-applied roong products.
Remove all dirt, dust, loose and aking parcles, grease, oil, laitance,
polluon fallout, and other contaminants that may interfere with proper
adhesion.
•
Use a s bristle push broom and/or pressure washing for cleaning and
surface preparaon.
•
When encountering roof substrates that have living organisms such as
algae, mold or fungus , a sterilant such as 3:1 bleach soluon must be used
to kill and remove these organisms during the roof cleaning.
Pressure Washing
•
Substrate must be pressure-washed with water and/or approved cleaner.
Refer to the Cleaner & Primer Guide in this Manual for specic cleaner
informaon for the substrate you are working with.
•
A minimum working pressure of 2,000 psi is to be used to remove all dirt,
dust, chalking and waste products (oil, oil-based roof cements, solvents,
grease, animal fats, etc.).
•
Concrete, EPDM, and metal substrates should use a minimum working
pressure of 3,000 psi.
•
Care should be taken not to damage the roof surface or inject water into
the substrate during washing.
•
Allow at least 48 hours for complete drying aer the cleaning process.
Important! Environmental
Consideraons
•
Corrugated or structural transite panels are likely to contain signicant
amounts of asbestos, which may be released during pressure-washing.
Asbestos dust is an extreme health hazard and known as a carcinogen. It is
the Installer’s responsibility to check with state and local agencies regarding
proper disposal, as well as the proper protecon for workers exposed to
this material.
•
Roof wash-o catchment systems should be in place when required. Be
sure to follow state and local requirements for roof-wash o catchments
during the cleaning process.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
17
GENERAL SUBSTRATE PREPARATION
Substrate Preparaon: Metal
Areas of Concern Preparaon
Crickets
•
Sheet metal crickets must be installed according to metal deck
manufacturer's specicaons.
•
New crickets must be sealed with HydroStop® PremiumCoat® Buer
Grade Flashing under the anges before they are mechanically aached
to the curb unit and metal roof panel.
•
Stch-screw cricket anges to the curb unit and metal roof panel while
the HydroStop® PremiumCoat® Buer Grade Flashing is sll wet using
fasteners.
Ponding Water Areas
•
Make every eort to eliminate all ponding water areas prior to coangs
applicaon.
•
Treat ponding water areas which cannot be eliminated with HydroStop®
BarrierGuard® bulked with HydroFiber prior to applicaon of other
coangs. If ponding water cannot be eliminated, areas should be treated
with a 3-course applicaon of HydroStop® BarrierGuard® and fabric.
Residual Asphalt
•
Remove any exisng asphalc roof coang.
•
Any residual asphalt must be coated with UniBase Primer (see Cleaner &
Primer Guide).
Pre-Finished Metal Panels
•
If roof panel surfaces are known or suspected to contain Kynar-500,
other uoropolymers, or silicone, test patches need to be prepared with
and without the use of XR-2000 Primer (see Cleaner & Primer Guide).
Based on test patch adhesion results, Installer should apply primer on
pre-nished metal panels per specicaons.
Pitch Pans
•
Pitch pans must be capped with sheet metal so they can be sealed
with HydroStop® PremiumCoat® Buer Grade Flashing. Contact GAF's
Technical Services Department for more informaon.
Neoprene Pipe Boots
•
Install neoprene boots prior to performing ashing work for certain types
of pipe penetraons. Neoprene boots rst must be sealed to the roof
using a bead of HydroStop® PremiumCoat® Buer Grade Flashing prior
to mechanical aachment with fasteners.
Condensate Lines
•
Condensate lines should be installed from the HVAC units to guers as
part of the overall roong contract. Type of piping used for condensate
lines may vary depending on local building codes.
•
Condensate lines must be securely fastened to panel ribs. All fastener
heads must be encapsulated with HydroStop® PremiumCoat® Buer
Grade Flashing.
Cinch Straps at Panel End Laps
•
Re-ghten cinch straps as necessary.
•
Surround each strap and fastener head with a bead of HydroStop®
PremiumCoat® Buer Grade Flashing.
•
Encapsulate the cinch strap water channel, then seal the enre lap,
strap, and fastener heads with a minimum of 12 inches (305 mm)
width of HydroStop® PremiumCoat® Buer Grade Flashing. Feather
the HydroStop® PremiumCoat® Buer Grade Flashing out. Fabric is not
required.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
18
Substrate Preparaon: Metal (Cont’d.)
Areas of Concern Preparaon
Ridge Caps
•
All ridge caps must be ashed with HydroStop® PremiumCoat® Buer Grade
Flashing with fabric.
•
All voids and open areas in the ridge cap must be lled with polyurethane
foam prior to applicaon of the coang and fabric.
•
For metal "Z" closures which are located within 2 inches (51 mm) of the
ridge cap edge, remove all exposed sealant and apply a liberal bead of
HydroStop® PremiumCoat® Buer Grade Flashing with fabric to all sides of
the "Z" closure where they intersect with both the roof panel and ridge cap.
Rakes
•
All xed rake details for the roof must be secured and sealed with 12 inches
(305 mm) minimum width of HydroStop® PremiumCoat® Buer Grade
Flashing with fabric.
•
If xed rake metal is fastened to the top of roof panel ribs and extends back
onto the roof, trim o any excess metal and follow horizontal seam ashing
procedures.
•
All voids and open areas must be lled with polyurethane foam prior to
applicaon of the coang and fabric.
Parapet Walls
•
All parapet wall details within the roof system must be secured and sealed
with 12 inches (305 mm) minimum width of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
If parapet wall ashing metal is fastened to the top of roof panel ribs and
extends back onto the roof, trim o any excess metal and follow horizontal
seam ashing procedures.
•
All voids and open areas must be lled with polyurethane foam prior to
applicaon of HydroStop® PremiumCoat® Buer Grade Flashing with fabric.
•
Fabric must be cut around all fasteners so it lies at. United Coangs™
UniCap fastener covers can alternavely be used.
Standing Seam Panels
•
Contact GAF’s Technical Services Department (800-766-3411).
Curb Flashings
•
All curb ashings, including cricket details, must be ashed with at least a 12
inch (305 mm) width of HydroStop® PremiumCoat® Buer Grade Flashing
with fabric.
•
Encapsulate all fasteners using HydroStop® PremiumCoat® Buer Grade
Flashing with fabric. Do not bridge fasteners.
•
The fabric must be cut around all fasteners so the fabric lies at.
Penetraons
•
HydroStop® PremiumCoat® Buer Grade Flashing with fabric should be
applied around the base of all penetraons, extending at least 6 inches (152
mm) up the vercal and 6 inches (152 mm) onto the base.
•
Cut the fabric to accommodate the shape of the penetraon.
Skylights
•
Curb skylights must be treated in the same fashion as curb ashings.
•
Aer ashing work has been completed and the coang has cured, treat
deteriorated berglass skylight panels with United Coangs™ Acrysheen
Sealer.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
19
Substrate Preparaon: Metal (Cont’d.)
Areas of Concern Preparaon
VERTICAL SEAMS
Ribbed Seam
•
All ribbed panel vercal seams must be sealed with HydroStop®
PremiumCoat® Buer Grade Flashing. Feather the coang unl
seams are no longer visible while brushing in the direcon parallel
to the seam.
Standing Seam
•
All standing vercal seams must be sealed with a 1/2 inch (12 mm)
bead of HydroStop® PremiumCoat® Buer Grade Flashing. Feather
the coang unl seams are no longer visible while brushing in the
direcon parallel to the seam.
Standing “T” Seam
•
Both vercal seams of the standing "T" must be ashed with a 1/2
inch (12 mm) bead of the HydroStop® PremiumCoat® Buer Grade
Flashing and brushed into the seams.
Inverted “J” Seam
•
In snowy climates and/or when roof leaks are suspected, re-
crimping the short leg of the seam all the way under the horizontal
poron of the inverted "J" seam is required. Brush or trowel-apply
HydroStop® PremiumCoat® Buer Grade Flashing over the newly
created single lock vercal seam. Portable seamers may be used to
perform the re-crimping.
Corrugated Seam
•
All corrugated panel vercal seams must be sealed with
HydroStop® PremiumCoat® Buer Grade Flashing. Feather the
coang unl seams are no longer visible while brushing in the
direcon parallel to the seam.
Baen Seam
•
Both vercal seams of the baen must be ashed with a 1/2
inch (12 mm) bead of HydroStop® PremiumCoat® Buer Grade
Flashing. Feather the coang unl seams are no longer visible
while brushing in the direcon parallel to the seam.
HORIZONTAL SEAMS
Horizontal Seam
•
All seams must be reinforced with two layers of HydroStop®
PremiumCoat® Buer Grade Flashing with fabric or TOPCOAT®
Liquid Fabric.
•
The coang must be feathered at least 1 inch (25 mm) beyond
each side of the 6 inch (152 mm) width to allow water to ow over
the seam.
•
Fabric must be cut around all fasteners so it lies at.
•
For ribbed roof panels, the fabric must be applied over panel ribs
in connuous lengths. A minimum 2 inches (51 mm) overlap is
required for all splices in fabric.
•
Horizontal seams must be secured with fasteners on the high side
of every other corrugaon, spaced no more than 12 inches (305
mm) on center.
•
The horizontal seam must be made ush by installing two
fasteners per ute.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
20
Substrate Preparaon: TPO
Areas of Concern Treatment
Parapet Walls
•
Repair all open seams and any loose or failed terminaons with in-
kind materials prior to applicaon of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
All parapet wall details within the roof system must be secured
and sealed with a 12 inch (305 mm) minimum width of
HydroStop® PremiumCoat® Buer Grade Flashing with fabric.
•
Fabric must be cut around all fasteners so it lies at.
Curb Flashings
•
All curb ashings, including cricket details, must be ashed with
at least a 12 inch (305 mm) width of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
Encapsulate all fasteners using HydroStop® PremiumCoat® Buer
Grade Flashing with fabric. Do not bridge fasteners.
•
Fabric must be cut around all fasteners so it lies at.
Penetraons
•
HydroStop® PremiumCoat® Buer Grade Flashing with fabric must
be applied around the base of all penetraons, extending at least
6 inches (152 mm) up the vercal and 6 inches (152 mm) onto the
base.
•
Cut the fabric to accommodate the shape of the penetraon.
Skylights
•
Curb skylights must be treated in the same fashion as curb
ashings.
•
Aer ashing work has been completed and the coang has cured,
treat deteriorated berglass skylight panels with United Coangs™
Acrysheen Sealer.
Pitch Pans
•
Pitch pans must be capped with sheet metal so that they may be
sealed with HydroStop® PremiumCoat® Buer Grade Flashing.
Condensate Lines
•
Condensate lines must be installed from HVAC units to guers as
part of the overall drainage system. The type of piping used for
condensate lines may vary depending on local building codes.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
21
Substrate Preparaon: PVC & Hypalon®
Areas of Concern Treatment
Parapet Walls
•
Repair all open seams and any loose or failed terminaons with in-
kind materials prior to applicaon of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
All parapet wall details within the roof system must be secured
and sealed with a 12 inch (305 mm) minimum width of
HydroStop® PremiumCoat® Buer Grade Flashing with fabric.
•
Fabric must be cut around all fasteners so it lies at.
Curb Flashings
•
All curb ashings, including cricket details, must be ashed with
at least a 12 inch (305 mm) width of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
Encapsulate all fasteners using HydroStop® PremiumCoat® Buer
Grade Flashing with fabric. Do not bridge fasteners.
•
Fabric must be cut around all fasteners so it lies at.
Penetraons
•
HydroStop® PremiumCoat® Buer Grade Flashing with fabric must
be applied around the base of all penetraons, extending at least
6 inches (152 mm) up the vercal and 6 inches (152 mm) onto the
base.
•
Cut the fabric to accommodate the shape of the penetraon.
Skylights
•
Curb skylights must be treated in the same fashion as curb
ashings.
•
Aer ashing work has been completed and the coang has cured,
treat deteriorated berglass skylight panels with United Coangs™
Acrysheen Sealer.
Pitch Pans
•
Pitch pans must be capped with sheet metal so that they may be
sealed with HydroStop® PremiumCoat® Buer Grade Flashing.
Condensate Lines
•
Condensate lines must be installed from HVAC units to guers as
part of the overall drainage system. The type of piping used for
condensate lines may vary depending on local building codes.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
22
Substrate Preparaon: EPDM
Areas of Concern Treatment
Parapet Walls
•
Repair all open seams and any loose or failed terminaons with in-
kind materials prior to applicaon of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
All parapet wall details within the roof system must be secured
and sealed with a 12 inch (305 mm) minimum width of
HydroStop® PremiumCoat® Buer Grade Flashing with fabric.
•
Fabric must be cut around all fasteners so it lies at.
Curb Flashings
•
All curb ashings, including cricket details, must be ashed with
at least a 12 inch (305 mm) width of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
Encapsulate all fasteners using HydroStop® PremiumCoat® Buer
Grade Flashing with fabric. Do not bridge fasteners.
•
Fabric must be cut around all fasteners so it lies at.
Penetraons
•
HydroStop® PremiumCoat® Buer Grade Flashing with fabric must
be applied around the base of all penetraons, extending at least
6 inches (152 mm) up the vercal and 6 inches (152 mm) onto the
base.
•
Cut the fabric to accommodate the shape of the penetraon.
Skylights
•
Curb skylights must be treated in the same fashion as curb
ashings.
•
Aer ashing work has been completed and the coang has cured,
treat deteriorated berglass skylight panels with United Coangs™
Acrysheen Sealer.
Pitch Pans
•
Pitch pans must be capped with sheet metal so that they may be
sealed with HydroStop® PremiumCoat® Buer Grade Flashing.
Condensate Lines
•
Condensate lines must be installed from HVAC units to guers as
part of the overall drainage system. The type of piping used for
condensate lines may vary depending on local building codes.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
23
Substrate Preparaon: Smooth & Granulated Surfaced Asphalc
Areas of Concern Treatment
Parapet Walls
•
Repair all open seams and any loose or failed terminaons with in-
kind materials prior to applicaon of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
All parapet wall details within the roof system must be secured
and sealed with a 12 inch (305 mm) minimum width of
HydroStop® PremiumCoat® Buer Grade Flashing with fabric.
•
Fabric must be cut around all fasteners so it lies at.
Curb Flashings
•
All curb ashings, including cricket details, must be ashed with
at least a 12 inch (305 mm) width of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
Encapsulate all fasteners using HydroStop® PremiumCoat® Buer
Grade Flashing with fabric. Do not bridge fasteners.
•
Fabric must be cut around all fasteners so it lies at.
Penetraons
•
HydroStop® PremiumCoat® Buer Grade Flashing with fabric must
be applied around the base of all penetraons, extending at least
6 inches (152 mm) up the vercal and 6 inches (152 mm) onto the
base.
•
Cut the fabric to accommodate the shape of the penetraon.
Skylights
•
Curb skylights must be treated in the same fashion as curb
ashings.
•
Aer ashing work has been completed and the coang has cured,
treat deteriorated berglass skylight panels with United Coangs™
Acrysheen Sealer.
Pitch Pans
•
Pitch pans must be capped with sheet metal so that they may be
sealed with HydroStop® PremiumCoat® Buer Grade Flashing.
Condensate Lines
•
Condensate lines must be installed from HVAC units to guers as
part of the overall drainage system. The type of piping used for
condensate lines may vary depending on local building codes.
NOTE: For spudded gravel surfaces, please contact GAF Technical Services (800-766-3411).
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
24
Substrate Preparaon: Structural Concrete
Areas of Concern Treatment
Parapet Walls
•
Repair all cracked, spalled and open concrete holes with an in-kind
cemenous patch. Repair any loose or failed seams with similar
materials as originally used. This is commonly a polyurethane
sealant with a closed cell polyethylene backer rod.
•
All parapet wall details within the roof system must be secured
and sealed with a 12 inch (305 mm) minimum width of
HydroStop® PremiumCoat® Buer Grade Flashing with fabric.
•
Fabric must be cut around all fasteners so it lies at.
Curb Flashings
•
All curb ashings, including cricket details, must be ashed with
at least a 12 inch (305 mm) width of HydroStop® PremiumCoat®
Buer Grade Flashing with fabric.
•
Encapsulate all fasteners using HydroStop® PremiumCoat® Buer
Grade Flashing with fabric. Do not bridge fasteners.
•
Fabric must be cut around all fasteners so it lies at.
Penetraons
•
HydroStop® PremiumCoat® Buer Grade Flashing with fabric must
be applied around the base of all penetraons, extending at least
6 inches (152 mm) up the vercal and 6 inches (152 mm) onto the
base.
•
Cut the fabric to accommodate the shape of the penetraon.
Skylights
•
Curb skylights must be treated in the same fashion as curb
ashings.
•
Aer ashing work has been completed and the coang has cured,
treat deteriorated berglass skylight panels with United Coangs™
Acrysheen Sealer.
Pitch Pans
•
Pitch pans must be capped with sheet metal so that they may be
sealed with HydroStop® PremiumCoat® Buer Grade Flashing.
Condensate Lines
•
Condensate lines must be installed from HVAC units to guers as
part of the overall drainage system. The type of piping used for
condensate lines may vary depending on local building codes.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
25
Adhesion Tesng
Adhesion tesng is generally performed to verify the suitability of any substrate to receive a liquid-
applied coang system. It is the responsibility of the roong contractor to determine the suitability of
the substrate prior to the applicaon of a liquid-applied coang system.
When adhesion tests are conducted:
• Test patches shall be labeled and photographed to document adhesion results.
• Installer can consult with GAF’s Technical Services Department (800-766-3411) concerning all
adhesion test results.
GAF recommends either of the following test methods:
Test Method #1: Test Patches
Overview Patch tesng gives informaon about the bond strength created
between a liquid-applied product and a substrate.
Preparaon
•
Installer should prepare no fewer than three (3) test patches at
dierent locaons on the roof for all quesonable roof substrates
to verify adhesion of the liquid-applied coang system.
Test Method
•
Minimum test patch size should be 1 square foot (0.09 square
meter).
•
Allow at least seven (7) full 24 hour days of drying me aer
applicaon of the test patches before checking adhesion.
•
Check adhesion by slicing an “X” (approx. 6” [152 mm] in size) near
the center of the test patch.
•
Using a spatula, try to remove the material at the center of the
“X”.
Acceptable Result:
•
Test patches that show good adhesion will release or chip away
from the surface in very small pieces.
Unacceptable Result:
•
Test patches that peel o of the surface and show the underlying
substrate reect poor adhesion.
Substrate
Conditions
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
26
Test Method #2: Field Peel Adhesion (Alternate to Test Patches)
Overview
ASTM D903 “Peel Adhesion” is found in all roof coang standards
and is especially well-suited to eld tesng with elastomeric
materials. Primers and enamels may also be evaluated by a similar
test called ASTM D3359 “Tape Adhesion.” It may also be important to
run the test wet; this is called “wet adhesion.”
Preparaon101
•
Make a mock-up of the intended coang system on the exisng
roof surface.
•
Duplicate any mechanical surface preparaon.
•
Simulate cleaners and power washing.
•
A worn Scotch-Brite® cleaning pad makes a good power washing
simulaon.
•
Prime as specied.
•
Apply a layer of elastomeric coang to the substrate.
•
Installer should prepare no fewer than three (3) test patches at
dierent locaons on the roof for all quesonable roof substrates
to verify adhesion of the liquid-applied coang system.
Test Method
•
Wet about 6” (152 mm) of a precut 1” (25 mm) wide by 12” (305
mm) long fabric strip with the coang.
•
Allow the remaining 6” (152 mm) of the fabric to be available to
pull on the test sample.
•
Apply another layer of coang to encapsulate the weed secon of
fabric.
•
Allow to dry. This can be anywhere from 24 hours to 2 weeks.
•
In warm weather, 1 day may be sucient.
•
In cold weather, 5 days is oen required.
•
The standard pracce is 1 week.
•
Soak prior to tesng (best pracce).
•
One hour is usually sucient; use wet rag and cover with a
bucket lid or plasc.
•
Some coangs like polyvinylidene diuoride (PVDF) or silicone
may take longer.
Oponal
•
Pre-cut 1” (25 mm) wide strips of butyl tape work faster and can be
used in a post installaon inspecon. A “wet adhesion” version can
be accomplished by soaking the roof area rst as indicated above,
but follow with a towel dry, and then use butyl tape to run the pull
test. The butyl tape can be easier to use with a gauge as it will bond
to itself making a perfect loop.
Quantave Evaluaon (best pracce) Qualitave Evaluaon
•
Use a force gauge such as a digital sh scale or trigger
pressure gauge.
•
A loop, staple or clamp may be used to hold the fabric in
the gauge.
•
Pull slowly; the peak value should be above 2 pounds/
inch (2 PLI).
Excellent: Coang tears up the substrate (cohesive
failure of substrate)
Very Good: Most of the coang remains on the
substrate (cohesive failure of coang)
Good: Some coang remains on the substrate
(paral cohesive failure of coang)
Fair: Coang pulls clean but pulls below 2 pounds/
inch (2 PLI)
Poor: Test strip comes o easily and cleanly
(complete cohesive failure of coang)
Quick Specss
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
27
Section 3
Quick Specs
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
28
HydroStop® PremiumCoat® Quick Spec Directory
Spec Number Substrate Specicaon Page #
HS-1 Metal – HydroStop® PremiumCoat® 29
HS-2 Smooth & Granulated Asphalc – Hydro�top™ PremiumCoat® 30
HS-3 TPO – HydroStop® PremiumCoat® 31
HS-4 PVC – HydroStop® PremiumCoat® 32
HS-5 Hypalon® - HydroStop® PremiumCoat® 33
HS-6 EPDM – HydroStop® PremiumCoat® 34
HS-7 Structural Concrete – HydroStop® PremiumCoat® 35
HS-8 Corrugated Structural Transite Panel – HydroStop® PremiumCoat® 36
HS-9 ISO – HydroStop® PremiumCoat® 37
HS-10 Gypsum (DensDeck & SecuRock) – HydroStop® PremiumCoat® 38
HS-11 Warranty Extension/Renewal – HydroStop® PremiumCoat® 39
Quick Specs are abbreviated specicaons and are not meant to replace detailed
specicaons. Complete 3-part CSI System Specicaons are available at
www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
29
QUICK SPEC
METAL – HYDROSTOP® PREMIUMCOAT® (HS-1)
Method
Requirements
Applicaon
Instrucons
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
1. Tighten and/or replace exisng fasteners.
2. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
3. Install crickets to divert water and complete other necessary sheet metal repairs.
4. Prime rusty areas with Acrylex 400 Primer or StableRust Rust-Inhibing Primer.
For severe rust, prime area with Lock-Down Primer.
5. Treat seams.
6. Treat all roof penetraons, skylight curbs & rake edges with HydroStop®
PremiumCoat® Buer Grade Flashing with fabric.
7. Encapsulate fasteners with HydroStop® HydroCap Fastener Caps or HydroStop®
PremiumCoat® Buer Grade Flashing.
8. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
9. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the chart
below.
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
METAL
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat Finish Coat System Warranty
Area Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10 Year
Horizontal & Vercal
Seams w/fabric 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
Field of Roof
(no fabric) N/A 00.75 0.75 1.5 13 1.5 13
15 Year
Horizontal & Vercal
Seams w/fabric 2.5 27 1.0 1.0 2.0 17 4.5 44
Yes Yes
Field of Roof
(no fabric) N/A 0 1.0 1.0 2.0 17 2.0 17
20 Year
Horizontal & Vercal
Seams w/fabric 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
Yes Yes
Field of Roof
(no fabric) N/A 0 1.0 1.0 1.0 3.0 25 3.0 25
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
30
QUICK SPEC
SMOOTH & GRANULATED ASPHALTIC – HYDROSTOP® PREMIUMCOAT® (HS-2)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Conduct moisture survey and remove/replace all wet areas.
2. Repair membrane including seams, penetraons, ashings, curbs, and
terminaons with like materials.
3. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
4. Prime with UniBase Primer.
5. Treat all roof penetraons, drains, curbs, and scuppers.
6. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
7. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the chart
below.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
SMOOTH AND GRANULATED ASPHALTIC
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
31
QUICK SPEC
TPO – HYDROSTOP® PREMIUMCOAT® (HS-3)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Conduct moisture survey and remove/replace all wet areas.
2. Repair membrane including seams, penetraons, ashings, curbs, and
terminaons with like materials.
3. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
4. Prime with TPO Red Primer.
5. Treat all roof penetraons, drains, curbs, and scuppers.
6. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
7. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the chart
below.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
TPO
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
32
QUICK SPEC
PVC – HYDROSTOP® PREMIUMCOAT® (HS-4)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Conduct moisture survey and remove/replace all wet areas.
2. Repair membrane including seams, penetraons, ashings, curbs, and
terminaons with like materials.
3. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
4. In most cases, no primer is required for this substrate.
5. Treat all roof penetraons, drains, curbs, and scuppers.
6. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
7. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the
chart below.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
PVC
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
33
QUICK SPEC
HYPALON® - HYDROSTOP® PREMIUMCOAT® (HS-5)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Conduct moisture survey and remove/replace all wet areas.
2. Repair membrane including seams, penetraons, ashings, curbs, and
terminaons with like materials.
3. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
4. In most cases, no primer is required for this substrate.
5. Treat all roof penetraons, drains, curbs, and scuppers.
6. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
7. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the chart
below.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
HYPALON®
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
34
QUICK SPEC
EPDM – HYDROSTOP® PREMIUMCOAT® (HS-6)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Conduct moisture survey and remove/replace all wet areas.
2. Repair membrane including seams, penetraons, ashings, curbs, and
terminaons with like materials.
3. Clean and allow roof to completely dry.
4. Prime using either Adhere-It II or CleanAct Rinsable Primer.
5. Treat all roof penetraons, drains, curbs, and scuppers.
6. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
7. Apply HydroStop® PremiumCoat® Foundaon Coat and HydroStop®
PremiumCoat® Finish Coat per the chart below.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
EPDM
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
35
QUICK SPEC
STRUCTURAL CONCRETE – HYDROSTOP® PREMIUMCOAT® (HS-7)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures
in forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
• Concrete must be fully cured (typically 28 days).
1. Conduct moisture survey to ensure concrete contains less than 8% moisture.
2. Repair or replace damaged or deteriorated secons with like materials,
allowing cemenous products to cure properly.
3. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow roof to completely dry.
4. Prime with Epoxy Primer.
5. Treat structural joints with backer rod and compable sealant.
6. Treat all roof penetraons, drains, curbs, and scuppers.
7. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
8. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the
chart below.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique & waste
factor. Primer/Base is not included in DFT calculaons.
STRUCTURAL CONCRETE
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
36
QUICK SPEC
CORRUGATED STRUCTURAL TRANSITE PANELS – HYDROSTOP® PREMIUMCOAT® (HS-8)
Method
Requirements
Applicaon
Instrucons
• Moisture survey recommended for all non-metal roofs.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Repair or replace damaged or deteriorated secons with like materials, allowing
cemenous products to cure properly.
2. Power-wash roof to ensure it is free of dirt, debris, oil, and other contaminants
that could negavely aect adhesion. United Cleaning Concentrate (UCC) is
recommended to clean the roof. Allow to completely dry.
3. Prime with Epoxy Primer.
4. Treat expansion joints with backer rod and compable sealant. Concrete control
joints and transite gaps in excess of 1/16” (1.6mm) shall also be caulked.
5. Treat all roof penetraons, drains, curbs, and scuppers.
6. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
7. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the chart
below.
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
• Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
• Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
CORRUGATED STRUCTURAL TRANSITE PANEL
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
37
QUICK SPEC
POLYISOCYANURATE (ISO) – HYDROSTOP® PREMIUMCOAT® (HS-
9)
Method
Requirements
Applicaon
Instrucons
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Recover over an existing roof: one (1) layer of ISO is required. Refer to local
building code for further insulation requirements.
• New construction or tear-off: one (1) layer of ISO & minimum 1/4” (6.35 mm)
gypsum coverboard OR two (2) layers of fully adhered staggered ISO. If the
top layer is mechanically attached, plates must be encapsulated with Butter
Grade Flashing.
• All seams must be treated with Butter Grade w/fabric OR Foundation Coat w/
fabric.
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures
in forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Ensure roof is free of dirt, debris, oil, and other contaminants that could
negavely aect adhesion.
2. In most cases, no primer is required for this substrate.
3. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
4. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the
chart below.
•
Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
•
Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
POLYISOCYANURATE (ISO)
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
38
QUICK SPEC
GYPSUM (DensDeck & SecuRock) – HYDROSTOP® PREMIUMCOAT® (HS-10)
Method
Requirements
Applicaon
Instrucons
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• If mechanically attached, plates must be encapsulated with Butter Grade Flashing.
• All seams are to be treated with Butter Grade w/fabric OR Foundation Coat w/
fabric.
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Ensure roof is free of dirt, debris, oil, and other contaminants that could
negavely aect adhesion.
2. In most cases, no primer is required for this substrate.
3. Before applying the HydroStop® PremiumCoat® System, an adhesion test is
required to ensure an adhesion of a minimum of 2.0 PLI. Test patches to be
applied with system rates listed below.
4. Apply HydroStop® PremiumCoat® Foundaon Coat and Finish Coat per the chart
below.
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole, applicaon technique &
waste factor. Primer/Base is not included in DFT calculaons.
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
•
Use GAF Roof Brush to apply HydroStop® PremiumCoat® Foundaon Coat
•
Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
GYPSUM (DensDeck & SecuRock)
HYDROSTOP® PREMIUMCOAT® SYSTEM
Foundaon Coat
(with fabric) Finish Coat System Warranty
Total
(Gal/Sq)
DFT*
(mils)
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
3rd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils)
Total
(Gal/Sq)
DFT*
(mils)
Emerald
Pledge™
Diamond
Pledge™
10
Year 2.5 27 0.75 0.75 1.5 13 4.0 40
Yes Yes
15
Year 2.5 27 1.0 1.0 2.0 17 4.5 44
20
Year 2.5 27 1.0 1.0 1.0 3.0 25 5.5 52
Quick Specs
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.2
39
QUICK SPEC
WARRANTY EXTENSION/RENEWAL – HYDROSTOP® PREMIUMCOAT® (HS-11)
Method
Requirements
Applicaon
Instrucons
• The existing HydroStop® Roofing System will be inspected to determine eligibility
for recoat.
• Roof must be clean, dry, and tight.
• Adhesion test required to ensure proper adhesion to substrate(s).
• Apply at 50°F (10°C) and rising with no rain, dew, fog or freezing temperatures in
forecast for 24 hours.
• GAF recommends that the surface temperature be at or less than 110°F (43°C)
during application.
1. Roof must be inspected before work begins.
2. Ensure roof is free of dirt, debris, oil, and other contaminants that could negavely
aect adhesion.
3. Apply HydroStop® PremiumCoat® System per the chart below.
* DFT (Dry Film Thickness) is rounded to nearest mil. Actual DFT will vary dependent on substrate prole,
applicaon technique & waste factor. Primer/Base is not included in DFT calculaons.
•
Spray, roller, or brush apply HydroStop® PremiumCoat® Finish Coat
WARRANTY EXTENSION/RENEWAL
HYDROSTOP® PREMIUMCOAT® SYSTEM
Warranty
Term
Finish Coat Warranty
1st Coat
(Gal/Sq)
2nd Coat
(Gal/Sq)
Total
(Gal/Sq)
DFT*
(mils) Emerald Pledge™ Diamond
Pledge™
10
Year 0.75 0.75 1.5 13
Yes Yes
15
Year 1.0 1.0 2.0 17
NOTE: The following “Quick Spec” is an abbreviated specicaon and is not meant to replace the detailed
specicaon. Read the enre 3-Part CSI System Specicaon prior to starng the project. Specicaons are
available at www.gaf.com.
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Section 4
Care &
Preventative
Maintenance
Care & Preventative
Maintenance
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OVERVIEW
Due to its constant exposure to heat, cold, ultraviolet radiation, rain, snow, hail, high winds and/or
mechanical damage, a roof can be the most vulnerable component of a building’s exterior. Despite
these negative effects, long-term performance can be enhanced, and major roof problems avoided,
through correct design, quality materials, proper installation procedures and workmanship, and a
comprehensive roof maintenance program. The cost of a comprehensive maintenance program is
minimal compared to the cost of repairing and/or removing and replacing a damaged roofing system.
The roofing system is a critical asset in the overall building envelope, and should be treated as such.
Identifying and correcting potential problems early is paramount to ensuring that small problems do
not become major issues. It is also essential in maintaining the integrity of the roof, protecting the
building’s contents, and avoiding interruption of the building’s intended function. A thorough and
consistent maintenance schedule will not only extend the life of the roofing system and lower life
cycle and replacement costs, but will help protect other building components as well.
UNDERSTANDING THE IMPORTANCE OF PROPER ROOF MAINTENANCE AND REPAIR
Like all roofing systems, roofs that have been coated require regular maintenance and repair to
enhance long-term service life. The Roof Coatings Manufacturers Association (RCMA) recommends
that roofs and coatings be inspected twice each year, generally in the spring and fall, and after any
major storms or high speed wind events. Additional coating should be applied as necessary to repair
damage to the coating or underlying roofing substrate. Additional coating can also be applied where
the existing coating has worn away. Refer to the specific sections of this Manual for more information
on coating and re-coating applications.
GENERAL CARE & PREVENTATIVE MAINTENANCE
The following is a list of general care and maintenance recommendations that will help achieve
maximum performance from the roofing system.
•
Provide proper drainage...to minimize standing water on the roof. Keep the roof surface
clean from leaves, pine needles, twigs, paper, accumulated dirt and other debris, which
tends to accumulate at and clog drains. Cut back trees or branches growing too close to the
roof. Ponding of water on the surface of the roofing system will increase the probability of
moisture entering the structure in the event of a puncture or other mechanical damage to
the roofing membrane.
•
Check the building exterior...for settlement or movement. Cracks in the walls are a warning
of possible cracks in the roof substrate and flashing. Ensure that overhangs, cornices, fasciae,
and edging are in good condition.
•
Avoid damaging the roofing system by exposing it to any of the following, which could cause
premature degradation of the coating or membrane:
•
Liquids containing petroleum products
•
Solvents
•
Grease used for lubricating rooftop units or from restaurant vents
•
Oils (new or old) used for air conditioning or compressor units
•
Kitchen waste or other animal fats
•
Chemicals
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•
The use of catch pans (including proper drainage of these pans or other means of protection)
may be used to protect the roofing membrane from exposure to grease, chemicals, and
other materials that would otherwise be expelled onto the roof surface. Prolonged exposure
to these materials can cause swelling and possible degradation of the roofing system if spills
are not removed in a timely manner.
•
Check for signs of algae, mold, mildew or other plant growth on the roof, particularly in
shaded areas that hold water.
•
Unprotected areas of the roofing system are more susceptible to damage from heavy foot
traffic and additional measures must be taken to avoid damage to the system. Contact
GAF at 1-800-ROOF-411 (1-800-766-3411) for recommendations where heavy foot traffic is
expected.
•
If snow removal is necessary, use plastic shovels and be careful when working around
protrusions or other areas where detail work could be damaged. Snow blowers, picks, axes
and shovels with sharp edges must not be used on the roof.
•
Remove foreign debris, such as glass, bolts, nails, screws, metal shavings, and any other
materials that may cause punctures or cuts to the liquid-applied coating or roofing system.
•
Limit roof access. Most roof damage is caused by individuals that are not authorized to
access the roof, or by individuals that are not aware of the damage that can be caused when
proper precautionary procedures are not followed. Roof access should be strictly limited
to authorized personnel and outside personnel should be informed as to the precautions
necessary when accessing the roof. Make a log of all visitors and maintenance personnel
accessing the roof.
•
Make sure that maintenance personnel are warned against dropping tools and equipment
on the coated roof surface in order to avoid puncturing the membrane. When servicing
the rooftop HVAC units, antennas, solar panels, satellite dishes, etc., care should be taken
when placing tools, metal doors, lids, pans, or sharp objects on the coating system surface.
When moving roof-mounted units or equipment over coated roofs, avoid damage by placing
smooth plywood over the coating membrane prior to moving any equipment.
•
Repair of any damage caused by misuse of the roofing system is the responsibility of the
Building Owner. The Building Owner is also responsible for ensuring that any such damage
is properly repaired by either the original contractor of record or another GAF-certified
contractor. If timely repairs are not made to rectify mechanical damage or other misuse of
the roofing system, this can result in the need for major repairs or replacement of the roof or
roof coating system at the building owner’s sole expense.
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SEMI-ANNUAL INSPECTIONS & MAINTENANCE
When conducng a semi-annual inspecon, the liquid-applied roong system or coang may be
slippery when wet. Exercise cauon when walking on the liquid-applied roof system or coang during
or aer a rain shower, or if moisture is present in the form of dew, frost or ice. Pay aenon while
walking on light-colored surfaces as ice or frost build-up may not be as visible as on a dark surface.
Semi-Annual Inspecon & Maintenance
Consist of cleaning the membrane and then a visual examinaon of the roof coang system. The
inspecon should include the overall coang condion as well as the integrity of ashings, vent
pipes and other protrusions, skylights, drains, guers, parapet walls and caps, adjacent walls, and
mechanical equipment. Also check for evidence of any biological growth or other foreign debris.
Preventave Maintenance Program
Consists of regularly scheduled inspecons and subsequent correcve acons, intended to maximize
the life expectancy of the roong system. It is recommended that preventave maintenance semi-
annual inspecons be scheduled in the spring and fall.
Addional Inspecons
In addion to the scheduled semi-annual inspecon, addional inspecons should be scheduled if
the roof is exposed to abusive or unusual condions including but not limited to those listed below.
Maintenance programs that include semi-annual inspecons can usually be arranged through the
installing contractor or another GAF-cered contractor. They can also be performed by a registered
roof consultant or other qualied personnel who have been properly trained in liquid-applied roong
systems and safety. These inspecons should be aended by the Building Owner and/or in-house
maintenance personnel responsible for the roof. Addional roof inspecons should be conducted
whenever any of the following condions occur:
1. Exposure of the roof to severe weather, such as strong winds, hail or connuous heavy
rainfall.
•
Examine the roof for severely ponded areas, accumulated debris, and any damage
to building components that may allow moisture to inltrate the roong membrane.
The coang or liquid-applied system should also be examined in areas where severe
condions may have caused punctures, tears, abrasions or loose coang.
2. Aer repair or replacement of rooop equipment, or at any other me when the roof may
be exposed to acvies from other trades where damage may occur.
•
Examine the roof for spills, debris, sharp objects, punctures, excessive wear, or other
damage caused by heavy trac or modicaons to the roof.
Cleaning Procedures
WARNING: The liquid-applied roong system or coang may be slippery when wet. Exercise cauon
when walking on the liquid-applied roof system during cleaning.
1. Remove any build-up of rocks, branches, leaves, pine needles and other foreign debris,
as well as excessive dirt build-up around drains and other low areas. Use a plasc rake,
medium-bristle push brush or other appropriate method for removing accumulated debris
from the roof, using the least amount of pressure possible. Remove any excessive build-up or
blockage from drains, guers and downspouts. Ensure that downspouts on mul-level roofs
do not dump directly onto the coated roof surface below. Trim any overhanging trees to
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prevent excessive leaf and pine needle accumulaon, allowing as much sunlight to the roof
as possible to help eliminate mildew and algae growth.
2. Liberally apply GAF United Cleaning Concentrate, diluted at a rao of 1 part concentrate to
10 parts water, under low pressure to a given secon of the roof at the rate of 0.4 to 0.7
gallons per 100 2 (1.6 to 2.9 L/m2). Allow the cleaner to sit for a minimum of 15 minutes.
3. Make sure that areas where algae, mold, or mildew growth has occurred are thoroughly
saturated. These areas should also receive addional scrubbing with a medium to s bristle
brush to assure the most complete removal possible.
4. Pressure rinse toward the drains using clean water and a 1,200 to 1,500 psi pressure washer.
Use a fan p on the extension wand, held no closer than 12” (305 mm) from the coated roof
surface. Low areas where the dirt has accumulated may require addional agitaon using a
broom or cleaning pad.
IMPORTANT: Roof wash-o catchment systems should be in place when required. Be sure to
follow state and local requirements for roof-wash o catchments during the cleaning process.
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INSPECTION CHECKLIST
Pre-Inspecon
1.
Prior to the actual roof inspecon, a detailed roof plan should be prepared, on which any
defects and notes can be recorded.
2.
Prior to going onto the roof itself, inspect the underside of the deck (if accessible), as well
as the outside of the building. Note any signs of excessive moisture or deterioraon. These
observaons can give clues to not only problems with the roof, but also other condions
aecng the performance of the building envelope.
GAF Inspecon Checklist
Area of Concern Treatment ü
Roof Membrane & Flashings
•
Ensure that the overall roof coang membrane is sound and free
of mechanical damage, splits, crazing, and cracking. In areas prone
to standing water, inspect the coang surface for signs of blisters,
delaminaon, or degradaon caused by biological growth.
Roof Drains & Scuppers
•
Ensure that roof drains and scuppers are clear and free of all debris to
allow for proper drainage. Check drain covers to verify that they are
ght and properly fastened. Ensure that the coang around drains and
scuppers is sound and free of blisters, tears, and delaminaons.
Parapet Walls & Caps
•
Inspect interface between roof deck and parapet walls to ensure that
there are no splits or tears, and that the coang membrane is fully-
adhered and sound. Examine parapet walls and caps to ensure that there
are no cracks or breaks in the substrate or membrane that will allow
moisture to enter beneath the coang system.
Protrusions
•
Inspect the reinforced coang around all protrusions, such as vent pipes,
for any signs of splits, tears or delaminaons around the base. Ensure that
vent pipes have the proper caps installed. Inspect coang to ensure that it
is sll self-ashing and secure around the top of all protrusions.
Roof Mounted Equipment
•
All rooop equipment should be inspected to ensure that it is well-
secured to the base risers, and that the coang and reinforcement around
the base is sound and free of blisters, tears and delaminaons.
Skylights
•
Check the reinforcement around all skylights to ensure that it is sound and
free of blisters, tears and delaminaons.
Other Details
•
Check the bricks and mortar on chimneys, as well as caulking or joints in
metal ashings such as copings, counter-ashings, rooop units, curbs,
caps, expansion joints, etc. Repair or replace caulking as necessary.
Moisture Analysis (oponal)
•
If damage has caused concern with moisture penetraon into the roof
substrate, a non- destrucve moisture detecon survey can be conducted
to provide an accurate analysis. Two common methods are nuclear
metering and infrared thermography. A moisture meter probe can also be
inserted through the coang; however, this is a destrucve method and
will require the damage be repaired.
Minor Repairs
•
Areas found to need minor repairs (e.g., small punctures and tears) during
the inspecon may be repaired with Roof Mate Buer Grade. More
extensive repairs may be treated with Roof Mate Buer Grade product
with fabric. For project-specic recommendaons, please contact GAF’s
Technical Services.
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ROOF SPECIFIC LEAK INVESTIGATION
On metal decks, it is important to idenfy the direcon of the deck utes and deck slope. Moisture
may inltrate through the roong system, migrate in the lower utes of the deck, and leak inside the
building in low areas.
On concrete decks or on projects where the exisng roong material is le in place, leaks may result
from moisture entrapment in the original installaon.
On poorly insulated roong assemblies, leaks may occur as the result of condensaon. It is therefore
important to determine the leak locaon and frequency. Sources of air leakage should be sealed if
possible.
1. Begin leak invesgaons by conducng a thorough visual inspecon of the general locaon
on the roof where leaks have been detected inside the building.
2. Inspect detail areas such as drains, vents, scuppers, HVAC and other roof-mounted
equipment, parapets, ponded water areas, etc. If the roof is dry at the me of invesgaon,
areas where water ponds can be idened by evidence of accumulated residue on roof
membrane.
3. Examine lower areas of the roof for moisture beneath the roof coang system (so
insulaon can be detected when walking over the roof).
4. Check areas around mechanical rooop equipment, drains, skylights, roof hatches,
expansion joints, pipes, vents, etc. to idenfy cuts or punctures in the coang membrane.
5. Examine the condion of metal ashings (i.e., edging, coping, expansion joint covers,
parapet caps, etc.) for cracks and improperly sealed joints.
6. When a visible source of the leak has not been idened, wet the system at the ancipated
leak area with water and examine the interior area for leaks.
7. Oen, an inspecon of the underside of the deck will reveal signs of water leakage and/or air
inltraon.
EMERGENCY REPAIRS
GAF must be notified of any leaks within 30 days of discovery of a leak or GAF will have no
responsibility for making repairs or replacing that portion of the products that leak as a result of a
manufacturing defect. The Building Owner may make temporary repairs to minimize damage to the
building or its contents in an emergency. Only qualified workers should perform temporary repairs.
These repairs will not result in cancellation of the applicable guarantee or warranty as long as they
are reasonable and customary and do not result in permanent damage to the GAF roofing materials.
When weather conditions permit, permanent repairs should be completed by a GAF-certified
contractor at GAF’s direction if it is a covered leak or at the building owner’s direction for non-covered
leaks.
Repairs should not be made with asphalt-based products unless a wet patch type product is needed
for emergency purposes. If wet patch products are used they must be completely removed at the time
permanent repairs are made.
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Temporary Dry Surface Emergency Repairs
•
Clean the coating surface around the damaged area using GAF United Cleaning Concentrate.
•
Rinse the area with clean water and allow it to dry.
•
Apply HydroStop® PremiumCoat® Buer Grade Flashing and embed with fabric as needed to
provide additional strength. Contact GAF Technical Services before any other product is used
to confirm its suitability.
Specific Repairs to Liquid-Applied Roofing Systems over Spray Polyurethane Foam (SPF) Insulation
•
Minor breaks in the coating or mechanical damage to sprayed polyurethane foam (SPF)
may be repaired with approved urethane caulk and then top-coated with HydroStop®
PremiumCoat® Buer Grade Flashing with or without fabric. The damaged foam must be
completely cut away prior to repairing. If the repaired area is larger than 2” (51 mm) in
diameter, consult GAF Technical Services for proper repair procedures. Note: If silicone is
used for repair, the area must be filled with Unisil with Unisil Fibers.
•
Large blisters that are not leaking but have broken open should be removed and repaired. If
the blister has not broken open, GAF recommends leaving it in place.
Specific Repairs to Liquid-Applied Roofing Systems Not Over Spray Polyurethane Foam (SPF)
Insulation
•
Repair minor mechanical damage to the liquid-applied coating membrane with HydroStop®
PremiumCoat® Buer Grade Flashing and/or approved urethane caulk, and then top-coated
with an approved GAF product. The damaged membrane must be completely cut away prior
to repairing. If the repaired area is larger than 2” (51 mm) in diameter, consult GAF Technical
Services for proper repair procedures.
•
If the liquid-applied roofing system incorporates reinforcement fabric, then the repair should
use HydroStop® PremiumCoat® Buer Grade Flashing with or without fabric.
ROOF ALTERATIONS
General
GAF must be notified of any planned roof alterations prior to such alterations being made. Coverage
under the guarantee or warranty may be jeopardized if:
•
GAF is not notified of alterations.
•
The original contractor of record (or another GAF-certified contractor) does not do the
required work.
•
Non-GAF products are used.
All alterations must be pre-approved, including but not limited to modifications such as roof-top HVAC
units or other equipment, pipes, satellite dishes, antennas, conduit, general penetrations, skylights,
etc.
NOTE: These maintenance and inspection procedures are provided for guideline use only. Your
GAF-certified contractor or professional roof consultant may provide a more detailed maintenance
program. Maintain records of roof damage and maintenance inspections for each building roof.
Architectural Design
Drawings
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Section 5
Architectural
Detail Drawings
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Drawings
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HydroStop® PremiumCoat®
Architectural Design Drawings
Drawing Number Substrate Specicaon Page #
HS-101 Typical Metal Roof Joint Detail 50
HS-102 Secon at Vercal Panel Seam 51
HS-104 Deck Joint Stripping Detail 52
HS-201 Standard Drip Edge Detail 53
HS-202 Guer With Standard Drip Edge Detail 54
HS-203 Concrete Roof Deck Edge Detail 55
HS-300 Alternate Wall Flashing Detail 56
HS-301 Wall Flashing Detail 57
HS-302 Drip Edge Parapet Wall Detail 58
HS-303 Typical Roof Cant At Corner 59
HS-304 Typical Equipment Curb Flashing Detail 60
HS-305 Scupper Detail 61
HS-401 Curb to Curb Expansion Joint Flashing Detail 62
HS-502 Vent-Pipe Flashing Detail 63
HS-503 Vent-Stack Flashing Detail 64
HS-504 Standard Roof Drain Detail 65
HS-505 Exhaust Fan (for Cooking) Flash Detail 66
Architectural Design
Drawings
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Architectural Design
Drawings
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I
I
•�. SECTION AT VERTICAL PANEL SEAM
HS 102
.gaf.com
07054
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Drawings
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Architectural Design
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Architectural Design
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Architectural Design
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Architectural Design
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Architectural Design
Drawingss
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Architectural Design
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NOTES
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NOTES
