01 08 Book Harmer Roof Outlets

User Manual: Harmer Roof Outlets

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G581

Uniclass

premium products • proven solutions
CI/SfB
(52.5)
October 2010

Alumasc

Harmer Roof Outlets
Roof Drainage Systems

Contents

page

Introduction
■

About Alumasc

■

Harmer Roof Drainage Systems

■

Features and Key Benefits

■

Product Selector and Pipe Connection

■

Product Range Summary

Harmer AV Metal Outlets
■

Introduction

■

Vertical Spigot Outlets

■

Vertical Screw Outlets

■

Retro-Gulley Outlets

■

Multi-Gulley Outlets

Harmer Detail Metal Outlets
■

Introduction

■

45º Spigot Outlet

■

45º Screw Outlet

■

90º Spigot Outlet

■

90º Screw Outlet

■

Two Way Outlet

■

Balcony Outlet

■

Gulley Outlet

■

Car Park Outlet

Metal Outlet Accessories
■

Accessories

Harmer Insulated Outlets
■

Introduction

■

Vertical Spigot Outlets

■

Horizontal Spigot Outlets

■

Graduated Vertical Spigot Outlets

■

Accessories

Application Details and Installation
■

Harmer Metal Outlets

■

Insulated Outlets

Performance Data and Specification
■

Flow Rates

■

Specification

Alumasc Brands
■

Alumasc Technical Helpline 01744 648400

Alumasc Premium Products - All Brands

About Alumasc
Alumasc Exterior Building Products Ltd
Alumasc Exterior Building Products (Alumasc) is a leading supplier of premium
products and systems for specification, generating an annual turnover in excess of
£26 million. The Company has been a major force in the UK construction industry
for over 35 years, during which time Alumasc products and systems have been
used on some of Europe’s most prestigious buildings.
The company is part of the Alumasc Group plc. The Group has over 800
employees, generating turnover in excess of £93 million. The aim is to focus on
high quality, environmentally responsible building products within the construction
arena in order to deliver first class customer service, long-term solutions and
lasting relationships.
By pursuing sustainable building products, systems and manufacturing processes,
Alumasc aims to offer specifiers a wide choice of design alternatives, with longterm peace of mind. Recognised brands such as Harmer, Apex, Derbigum, ZinCo,
Hydrotech, Firestone and M.R., together with Alumasc's well-known architectural
rainwater range have been independently certified, and in some cases have a
lifespan in excess of 60 years or for the life of the building.

Quality and Sustainability
Quality: ISO 9001: 2008
Alumasc operates a quality management
system which is independently audited to
ISO 9001: 2008. The ISO 9001 framework
governs the management of many aspects
of Alumasc support services, manufacturing
and transport operations. Alumasc extends
quality management to its network of
approved installers for single source
accountability and peace of mind.

Alumasc brands are divided into distinct but interrelated groups:
■ Rainwater
■ Drainage
■ Waterproofing
■ Façades

Environment: ISO 14001: 2004

Services and Support
Alumasc leads the way in the field of construction product and system manufacture
and the delivery of proven solutions. This success is founded on four key areas:

Premium Products
A constantly evolving range of quality proven, world class products and systems,
fully accredited to UK, European and North American Standards.

Technical Support
Comprehensive data for specification and use of all products and systems is
available in published form, and on the company website. This is backed up by
proactive project support, led by specialist area managers and using the latest
CAD and calculation technology.

Alumasc's manufacturing sites are
audited to the ISO 14001:2004
Environmental Management Standard.
Alumasc is committed to achieving
improvements across all of its operating
sites, not only as a good neighbour to
the surroundings of manufacturing
plants, but in the responsible sourcing
of raw materials and monitoring of the
impact on the environment as a whole.

BREEAM Standards

National Stockists
Alumasc rainwater and drainage products are available through a national network
of stockists. This allows close control over all matters to ensure first class
customer service.

The BREEAM points system promotes the
use of sustainable materials and allows
designers to differentiate between
products with true ecological credentials
and those not achieving the benchmark.
Alumasc’s aluminium roof outlets are
part of the range of high scoring
Alumasc solutions.

Warranties
Alumasc products come with company backed assurance as to their quality, life
expectancy and suitability for purpose, ensuring long-term peace of mind for
specifiers and end users.

Alumasc Technical Helpline 01744 648400

Harmer Roof Drainage Systems
Introduction

Harmer Detail

Harmer Roof metal and insulated rainwater outlet systems, offer comprehensive
and innovative drainage solutions for all types of flat roof, including those carrying
vehicular traffic, and also for low pitch industrial roofing.

Harmer Roof Detail outlets comprise a
range designed to solve problematic
detailing requirements. The range
includes two way, balcony, car park
and gulley outlets. Detail outlets are
diecast in LM6 aluminium silicon alloy
to BS 1490: 1988.

All products are manufactured in accordance with certificated quality management
systems to the requirements of International Standard BS EN ISO 9001: 2008 —
Registration Nos Q 06401 and FM 35898, and British Standard BS 5750: Part 2.
The outlets may be used with, or kept independent of Harmer SML internal pipework
which is described in a separate brochure.
Harmer Roof rainwater outlet systems are available in three key groups - Harmer AV,
Harmer Detail and Harmer Insulated.

Harmer AV
AV Vertical Spigot or Screw
Outlets
Harmer Roof AV Vertical Spigot and
Screw outlets provide anti-vortex
performance within an economic range
of general purpose outlets. They are
diecast in LM6 aluminium silicon alloy
to BS 1490: 1988. AV outlets are
designed for connection to individual
downpipes and should not be used in
managed rainwater systems.

Detail Outlets

Harmer Insulated
AV Outlet (Vertical Spigot shown)

AV Retro-Gulley Outlets
Harmer Roof AV Retro-Gulley outlets
incorporate anti-vortex performance
and are designed for flat roof upgrading
without necessitating removal of the
old rainwater outlet. The body is
diecast in LM6 aluminium silicon alloy
as above. The Retro-Gulley aluminium
tail pipe connects direct into the
existing pipework via the old outlet.

Harmer Roof Insulated outlets have a
rigid polyurethane foam body with high
insulation value. They are ideal for
installation in flat roofs to avoid any
possibility of condensation forming as a
result of cold bridging.

AV Retro-Gulley Outlet

AV Multi-Gulley Outlets
Harmer Roof AV Multi-Gulley outlets
incorporate an adjustable spigot that
can be rotated to suit any angle of
outflow from horizontal to vertical.
Interchangeable spigots provide for
75mm or 100mm pipe connections.
Bodies and spigots are diecast in
LM6 aluminium silicon alloy to
BS 1490: 1988.

Insulated Outlets

Accessories

AV Multi-Gulley Outlet

Alumasc Technical Helpline 01744 648400

There is also a comprehensive
range of accessories for Harmer
metal and detail systems to ensure
the successful installation of Harmer
rainwater outlets in most types of
roof construction.

Features and Key Benefits
All Harmer Roof metal and insulated rainwater outlets are designed and
manufactured to ensure trouble free performance over a long period, in whatever
type of roof construction they are incorporated.

Insulated Rainwater
Outlets

Metal Rainwater Outlets
The principal design features and benefits of the Harmer metal rainwater outlet
range, which comprises the AV and Detail outlets, are listed below.

Components

Materials

■ An outlet body with a deep integral
sump for controlled flow of water
into the pipe.

Aluminium outlets

■ Fixing of the waterproof membrane
by a clamping ring ensures total
integrity of seal.
■ Domical grates for Harmer Detail
outlets permit a free flow of
rainwater while preventing loose
chippings or debris from entering
the outlet.
■ Domical grates for Harmer AV outlets
also incorporate a patented baffle to
prevent water swirl and air
entrapment enabling the outlet to
drain at 90% of pipe capacity and up
to 40% more roof area than conventional gravity outlets.
■ The side fixing of the clamping ring
and domical grate to the outlet
body, for both Detail and AV grates,
ensures that the throat is completely
unobstructed to facilitate rodding.
■ Optional flat grates are available
for trafficked areas.
■ Extension pieces can be fitted to
gratings in deep set structures.

■ These are cast in aluminium silicon
alloy LM6 to BS 1490:1970 and are
suitable for most types of flat roof.
■ The aluminium alloy is light in
weight and therefore easy to handle
on site and during installation. This
lightness also makes aluminium
outlets suitable for a wide range of
lightweight roof decks.
■ The alloy is stronger and less brittle
than cast iron and is particularly
resistant to corrosion, even in
marine conditions.
Gunmetal outlets
■ These are cast in leaded gunmetal
85/5/5/5 to BS 1400-LG2-C.
Gunmetal outlets are designed for
connection to copper pipework and
for installation in copper or leadclad roofs.
Optional insulation
■ A foamed insulation jacket is
available for vertical spigot and
vertical screw outlets only.

Domical
grate

Clamping
ring

(Optional
flat grate)

The principal design features and
benefits of the Harmer Insulated
rainwater outlet range are listed
below.
■ A one-piece polyurethane foam
body which provides a completely
watertight connection between roof
membrane and rainwater pipe.
■ The outlets are available with a
flexible connecting membrane
fused to the outlet body, which is
then sealed to either single or
multi-layer roof membrane systems.
■ As an alternative to the connecting
membrane, a clamping ring is
available for sealing specialised
single-ply membranes into the
outlet mouth.
■ A domical grate permits a free flow
of rainwater while preventing loose
chippings or debris from entering
the outlet.
■ The high insulation value of these
outlets eliminates the possibility of
condensation on the underside of
the outlet when used in warm roof
constructions.
■ Insulated outlets can also be
supplied with a heat sensor
protected electric element to give
the highest measure of protection
against ice and snow blockage, and
are particularly suitable for installation in areas of permanent
shadow or north facing aspects.

Domical grate

Clamping
ring
Outlet body

Outlet body

Detail Outlet

Outlet
body
with
connecting
membrane

Insulated Outlet
AV Outlet

Alumasc Technical Helpline 01744 648400

Product Selector and Pipe Connection
Harmer AV Outlets
Outlet Type

Code Ref

Pipe Dia

See Page

Cast Iron

HDPE

uPVC

Vertical Spigot

AV200

SML coupling

Post formed socket

AV300

SML coupling

“O” ring socket

AV400

100

SML coupling

“O” ring socket

AV600

150

SML coupling

“O” ring socket

AV200T

2ADP + SML coupling

Harmer adaptor 2ADP

AV300T

3ADP + SML coupling

Harmer adaptor 3ADP

AV400T

100

4ADP + SML coupling

Harmer adaptor 4ADP

AV600T

150

6ADP + SML coupling

Harmer adaptor 6ADP

RAV75

Harmer pipe seal

n/a

Harmer pipe seal

RAV100

100

Harmer pipe seal

n/a

Harmer pipe seal

MAV75

SML coupling

“O” ring socket

MAV100

100

SML coupling

“O” ring socket

Pipe Dia

See Page

(mm)

Vertical Screw

Retro-Gulley

Multi-Gulley

Pipe Material & Connection Type

Harmer Detail Outlets
Outlet Type

Code Ref

(mm)
45º Spigot

45º Screw

90º Spigot

90º Screw

Two-Way

Balcony

Gulley

Car Park

245

Pipe Material & Connection Type
Cast Iron

HDPE

uPVC

SML coupling

Post formed socket

345

SML coupling

Post formed socket

445

100

SML coupling

Post formed socket

245T

2ADP + SML coupling

Harmer adaptor 2ADP

345T

2ADP + SML coupling

Harmer adaptor 3ADP

445T

100

2ADP + SML coupling

Harmer adaptor 4ADP

290

SML coupling

Post formed socket

390

SML coupling

“O” ring socket

490

100

SML coupling

“O” ring socket

290T

2ADP + SML coupling

Harmer adaptor 2ADP

390T

3ADP + SML coupling

Harmer adaptor 3ADP

490T

100

4ADP + SML coupling

Harmer adaptor 4ADP

690T

150

6ADP + SML coupling

Harmer adaptor 6ADP

2TW-M

2ADP + SML coupling

Harmer adaptor 2ADP

2TW

2ADP + SML coupling

Harmer adaptor 2ADP

3TW

3ADP + SML coupling

Harmer adaptor 3ADP

4TW

100

4ADP + SML coupling

Harmer adaptor 4ADP

6TW

150

6ADP + SML coupling

Harmer adaptor 6ADP

2BO

SML coupling

Post formed socket

3BO

SML coupling

“O” ring socket

4B0

100

SML coupling

“O” ring socket

3GO

SML coupling

“O” ring socket

4GO

100

SML coupling

“O” ring socket

400T/CP

100

4ADP + SML coupling

Harmer adaptor 4ADP

600T/CP

150

6ADP + SML coupling

Harmer adaptor 6ADP

Alumasc Technical Helpline 01744 648400

Harmer Insulated Outlets
Outlet Type

Code Ref

Pipe Dia

See Page

(mm)
Vertical Spigot

Horizontal Spigot

Graduated

Pipe Material & Connection Type
Cast Iron

HDPE

uPVC

1000

SML coupling

“O” ring socket

1001

100

SML coupling

“O” ring socket

1003

150

SML coupling

“O” ring socket

1004

SML coupling

“O” ring socket

1005

100

SML coupling

“O” ring socket

1007

150

SML coupling

“O” ring socket

1008

SML coupling

“O” ring socket

1009

100

SML coupling

“O” ring socket

1011

SML coupling

“O” ring socket

1012

100

SML coupling

“O” ring socket

1017

Spigot

PVC socket
with “O”
ring

SML coupling

“O” ring socket

100

SML coupling

“O” ring socket

Harmer
screw
thread
adaptor

Mechanical
coupling

PVC socket
with “O”
ring

Socketless
pipe

Metal or insulated spigot
outlet to PVC pipework
(See note 3)

Metal spigot outlet to cast
iron and HDPE pipework

Metal screw outlet
to PVC pipework

Notes
1

Domical grates are supplied as standard.
To specify flat grate add /F to code reference.

Gunmetal outlets should be specified for use with copper pipework and copper
or lead-clad roofing.

Connection of 45º spigoted gunmetal outlets, 45º spigoted aluminium outlets
and 50mm 90º spigot outlets to pvc pipework requires the use of a socket
fitting (eg Key Terrain 126 post formed socket), which is heat shrunk, with an
“O” ring in position, over the spigot of the outlet. In such cases it is simpler,
and therefore preferable, to use a screw outlet with Harmer screw thread
adaptor, thus avoiding the need for a heat shrunk connection.

Mechanical
coupling

Socketless
pipe

Insulated spigot outlet to cast
iron and HDPE pipework

Alumasc Technical Helpline 01744 648400

Product Range Summary
Harmer AV Outlets
A range of general purpose flat
roof outlets
Pages 10-14

Harmer Detail Outlets
Designed to solve problematic
detailing requirement
Pages 15-23

Accessories - Metal Outlets
Pages 24-26

Harmer Insulated Outlets
Designed with high insulation value
to avoid condensation resulting from
cold bridging
Pages 28-32

Accessories - Insulated Outlets
Page 32

Alumasc Technical Helpline 01744 648400

Metal Rainwater
Outlets

Alumasc Technical Helpline 01744 648400

Introduction to AV Outlets
Main Characteristics
Harmer rainwater outlets provide,
with the Harmer Roof AV range, antivortex performance from an
economic, general purpose range of
outlets. Harmer Roof AV incorporates
a patented baffle within the grating,
to prevent water swirl and air
entrapment, enabling the outlet to
drain at 90% of its pipe capacity.

Bolts and Washers
Stainless steel

AV Grate

Tamper proof, secured to
clamping ring by two
pocketed stainless steel bolts

The performance of AV outlets
accelerates as the depth of water at
the outlet or rainfall intensity
increases. The unique high flow
performance of Harmer Roof AV
outlets demands that each outlet is
connected to a dedicated or individual
rainwater stack. AV outlets should be
used for securing optimum
performance when connected to
individual downpipes, and not as part
of a managed rainwater system.

Key Benefits of the Harmer Roof AV Range:
■ Drains up to 40% more roof area than conventional gravity outlet.
■ Harmer AV can be used with any connecting pipework material, and all popular pipework sizes.
■ Easy installation into roofs and gutters using bituminous and single ply waterproofing systems.
■ High flow performance with increasing head of water at the outlet.
■ Ensures 90% efficiency of outlet capacity.
■ Special retro-gulley for flat roof refurbishment is also available.
■ Multi-gulley available for angled discharge.

Alumasc Technical Helpline 01744 648400

Clamping Ring

Designed to secure the
waterproof membrane to the
outlet body, it is fixed to the
outlet body with two
stainless steel fixing studs

4 Outlet Body

Screwed, through
flange, to
supporting
structure

Vertical Spigot Outlets
Harmer Roof AV Vertical Spigot rainwater
outlets are designed for use with flat
roof structures using either insitu cast
concrete, timber and lightweight metal
deck construction. Harmer Roof outlets
are ideal for connection to continuous
waterproofing systems using single ply
membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof AV Vertical Spigot outlets
are available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper or lead-clad
roofs,or slate roofs using copper nails.
Aluminium outlets are cast in LM6
aluminium silicon alloy to
BS 1490: 1988.
Gunmetal outlets are the same design
as aluminium but are cast in 85/5/5/5
leaded gunmetal to BS EN 1982: 1999 CC491K.

Flat grate (optional)

Connection to Pipework

Vertical Spigot outlets are suitable for
direct connection to:
■ Cast iron pipework to EN 877 and
BS 416: 1973 with appropriate
coupling.

Domical grate

■ HDPE pipework with appropriate
coupling.

■ PVC O-ring socketed pipe to
BS 4514: 1983 (300, 400 and 600
outlets only).

Grates
Harmer AV rainwater outlets are
designed to receive either domical or
flat grates. Flat grates should be used
if the outlet occurs in an area which is
subject to pedestrian traffic. These
grates are also designed for use in
inverted roof constructions, where
paving slabs on special Harmer paving
slab supports are used to ballast the
insulation. Rainwater drains between
the open joints of the paving to the
concealed outlets beneath.

Spigots are sized to suit nominal
diameter pipework shown in the
table below
e

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)

AV200

AV300

AV400

AV600

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

(mm)
150

292

380

233

305

122

108

122

145

110

160

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

Vertical Screw Outlets
Harmer Roof AV Vertical Screw rainwater
outlets are designed for use with flat
roof structures using either insitu cast
concrete, timber and lightweight metal
deck construction. Harmer Roof outlets
are ideal for connection to continuous
waterproofing systems using single ply
membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof AV Vertical Screw outlets
are available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper, lead-clad roofs
and for connection to copper pipework,
or slate roofs using copper nails.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.
Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

Flat grate (optional)

Connection to Pipework
Vertical Screw outlets have a female
socket with parallel thread to BS 21: 1985
for direct connection to threaded tube
conforming with BS 1387:1985. This tube
is supplied with BS 21: 1985 taper male
thread which ensures a completely
watertight joint when screwed home into
the socket outlet.

a
b

Domical grate

Screw outlets are particularly
recommended where a connection to the
outlet occurs within the thickness of a
concrete slab. In such cases, a threaded
connection will create a completely gastight seal within the slab.
Harmer Roof AV screw outlets can be
connected to socketed and socketless cast
iron pipework, HDPE pipework and PVC
pipework by means of the Harmer Roof
screw threaded adaptor with appropriate
coupling. (See pages 6 and 26).

d
Connections to suit nominal
diameter pipe sizes shown in the
table below

Grates
Harmer AV rainwater outlets are designed
to receive either domical or flat grates.
Flat grates should be used if the outlet
occurs in an area which is subject to
pedestrian traffic. These grates are also
designed for use in inverted roof
constructions, where paving slabs on
special Harmer paving slab supports are
used to ballast the insulation. Rainwater
drains between the open joints of the
paving to the concealed outlets beneath.

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)

AV200T

AV300T

AV400T

AV600T

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

(mm)
150

292

380

234

305

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

Retro-Gulley Outlets
Harmer Roof AV Retro-Gulley outlets
are designed to fit within the existing
outlet and pipework of the roof which
is being upgraded.
The use of AV increases flow
performance at the outlet location
regardless of pipe diameter downsizing
by introduction of the retropipe.
There is no need to remove the old
rainwater outlet.
Because of minimal disturbance and
the ease with which the Retro-Gulley is
fitted, it represents an extremely costeffective and efficient solution to flat
roof upgrading.

Materials

The outlet body is in diecast LM6
aluminium silicon alloy to BS 1490: 1988,
and incorporates a welded 300mm
aluminium tail pipe. The tail pipe, cut to
the required length, is simply inserted
through the existing outlet, into existing
pipework, and sealed by means of the
Harmer Roof AV special multi-fin pipe
seal. This seal creates a watertight
junction between existing pipework and
the Retro-Gulley tail pipe.

c
d

The outlet body’s wide fixing flange
incorporates concentric grooves which
enhance the bond with roofing felts or
asphalt.

An LM6 aluminium silicon clamping
ring, also has a ridged under-surface
for improved bond with roofing
membranes.
Two sealable ports in the outlet body are
designed for injection of PU foam to fill
the void between old and new outlet.

Existing Pipe Diameter Ranges Suitable for Connection to AV Retro-Gulley

Connection to Pipework

Outlet ordering code

The Retro-Gulley may be used for any
type of warm roof refurbishment and
with any flat roof waterproofing
system. 75mm and 100mm pipework
options are available, and will
accommodate variations on pipe
internal diameter from PVC through to
cast iron pipe systems.

RAV75

71.5 — 78.5

RAV100

97.0 — 104.0

The AV Retro-Gulley has been designed
in conjunction with the Flat Roofing
Contractors Advisory Board.

Existing pipework internal diameter
(mm)

Table of Dimensions
Outlet ordering code

RAV75

RAV100

Pipe dia (nominal)

(mm)
75

(mm)
100

456

304

266

63.5

88.9

120

205

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

Multi-Gulley Outlets
Harmer Roof AV Multi-Gulley outlets are
designed to provide multidirectional
drainage. Rotated on site, the
interchangeable spigot pipe allows for
any angled outflow from vertical to
horizontal. This flexibility also affords
easier alignment of pipe systems.
Interchangeable spigots lock onto the
single size outlet body, yet enable
connections to 75mm or 100mm
pipework to be made. The special sump
design of the outlet body works in
conjunction with the anti-vortex grate
to provide optimum rainwater
movement. The Multi-Gulley has been
designed in close co-operation with
the Flat Roofing Contractors
Advisory Board. The fixing design
extends the use of the Multi-Gulley
to built-up roofing, single ply and
mastic asphalt waterproofing.

a
b

Materials
Harmer Roof AV Multi-Gulley outlets are
only available in cast aluminium.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490:1988

Connection to pipework
The Multi-Gulley outlets are suitable
for direct connection to:
■ Cast iron pipework to EN 877 and
BS 416: 1973 with appropriate
coupling.

■ HDPE pipework with appropriate
coupling.
■ PVC O-ring socketed pipe to
BS 4514: 1983.
e

Table of Dimensions
Outlet ordering code

MAV75

MAV100

Pipe dia (nominal)

(mm)
75

(mm)
100
460

(For flat grate, add /F to code reference)

460

305

201

115

110

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

Introduction to Harmer Detail Outlets
Main Characteristics

Areas of Application

The Harmer Roof Detail range includes
outlets to cover all the awkward
detailing situations that occur in
building design and in refurbishment.

Harmer Roof Detail includes outlets
specially designed for the following
situations:

Harmer Roof Detail outlets incorporate
all the key features inherent in the
Alumasc design approach to troublefree flat roof drainage:

45º Spigot Outlet

■ Integral and generously proportioned sump ensures an adequate
head of water for a steady flow
into the rainwater pipe.
■ Clamp fixing of the waterproof
membrane to the sides of the sump
completely eliminates any risk of
leakage through capillary action or
back pressure.
■ Elimination of flashings means
there is nothing which might reduce
the effective bore of the rainwater
pipe and restrict the flow of water.

45º Screw Outlet

90º Spigot Outlet

■ Connection to all standard sizes of
pipework.

90º Screw Outlet

Two-way Outlet

■ Spigot or Screw threaded aluminium
outlets cast in LM6 aluminium alloy
for connection to drainage pipework
at 45º and 90º.
■ Two-way screw threaded outlets
cast in LM6 aluminium alloy for
connection to pipework through a
parapet. Two-way outlets can be
installed to provide either vertical
or horizontal take-off, and are
particularly suitable for parapet
type applications.
■ Balcony spigot outlets cast in LM6
aluminium alloy for balcony
drainage or similar applications.
Supplied with a flat grate the
balcony outlet is ideal for use in
areas of pedestrian access. Grates
can be hole punched to receive 50,
75 or 100mm diameter rainwater
down pipes.
■ Gulley spigot outlets cast in LM6
aluminium alloy for narrow gutter
and gulley drainage where an outlet
narrower than the standard AV
outlet is required.
■ Screw threaded car park and
service deck drains cast in LM6
aluminium alloy for drainage
requirements in multi-level car park
and utility areas.
■ All patterns of outlets can be
manufactured in cast gunmetal alloy,
reference CC491K, where outlet
installation is required near to or
within copper or lead roofing systems.

Balcony Outlet

Gulley Outlet

Car Park Outlet

Alumasc Technical Helpline 01744 648400

45º Spigot Outlets
Harmer Roof Detail 45° Spigot rainwater
outlets are designed for use with flat
roof structures using either insitu cast
concrete, timber and lightweight metal
deck construction. Harmer Roof outlets
are ideal for connection to continuous
waterproofing systems using single ply
membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof Detail 45º Spigot outlets
are available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper, lead-clad roofs or
slate roofs using copper nails.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.

Flat grate (optional)

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

a
b

Connection to Pipework
45º Spigot outlets are suitable for
direct connection to:

Domical grate

■ Cast iron pipework to EN 877 and
BS 416: 1973 with appropriate
coupling.
■ HDPE pipework with appropriate
coupling.
Connection to PVC O-ring socketed pipe
to BS 4514: 1983 can be made by means
of a proprietary post-formed socket. The
socket is preformed onto the PVC
pipework and then heat-shrunk over the
spigot of the outlet with an O-ring in
position. However a simpler, and thus
preferred solution in such cases, is to use
a Harmer Roof Detail 45º Screw outlet
with Harmer Roof Screw Thread Adaptor.

c
Spigots are sized to suit nominal
diameter pipework shown in the
table below
d
e

Grates
Harmer Roof Detail 45º Spigot outlets
are designed to receive either domical
or flat grates. Flat grates should be
used if the outlet occurs in an area
which is subject to pedestrian traffic.
These grates are also designed for use
in inverted roof constructions, where
paving slabs on special Harmer paving
slab supports are used to ballast the
insulation. Rainwater drains between
the open joints of the paving to the
concealed outlets beneath.

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)

245

345

445

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

305

372

229

305

229

235

273

175

191

114

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

45º Screw Outlets
Harmer Roof Detail 45° Screw rainwater
outlets are designed for use with flat
roof structures using either insitu cast
concrete, timber and lightweight metal
deck construction. Harmer Roof outlets
are ideal for connection to continuous
waterproofing systems using single ply
membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof Detail 45º Screw outlets
are available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper, lead-clad roofs or
slate roofs using copper nails.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.

Flat grate (optional)

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

Connection to Pipework
45º Screw outlets have a female socket
with parallel thread to BS 21:1985 for
direct connection to threaded tube
conforming with BS 1387: 1985. This
tube is supplied with BS 21: 1985 taper
male thread which ensures a
completely watertight joint when
screwed home into the socket outlet.
45º Screw outlets are particularly
recommended where a connection to
the outlet occurs within the thickness of
a concrete slab. In such cases a threaded
connection will create a completely gastight seal within the slab.
Harmer Roof Detail screw outlets can be
connected to socketed and socketless cast
iron pipework, HDPE pipework and PVC
pipework by means of the Harmer Roof
Screw Threaded Adaptor with appropriate
coupling. (See pages 6 and 26).

Grates
Harmer Roof Detail 45º Screw outlets
are designed to receive either domical
or flat grates. Flat grates should be
used if the outlet occurs in an area
which is subject to pedestrian traffic.
These grates are also designed for use
in inverted roof constructions, where
paving slabs on special Harmer paving
slab supports are used to ballast the
insulation. Rainwater drains between
the open joints of the paving of the
concealed outlets beneath.

Domical grate

Connections to suit nominal
diameter pipe sizes shown in the
table below

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)

245T

345T

445T

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

305

372

229

305

159

186

109

113

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

90º Spigot Outlets
Harmer Roof Detail 90° Spigot rainwater
outlets are designed for use with flat
roof structures using either insitu cast
concrete, timber and lightweight metal
deck construction. Harmer Roof outlets
are ideal for connection to continuous
waterproofing systems using single ply
membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof Detail 90º Spigot outlets
are available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper, lead-clad roofs or
slate roofs using copper nails.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.

Flat grate (optional)

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

a
b

Connection to Pipework
90º Spigot outlets are suitable for
direct connection to:

Domical grate

■ Cast iron pipework to EN 877 and
BS 416: 1973 with appropriate
coupling.
c

■ HDPE pipework with appropriate
coupling.
■ PVC O-ring socketed pipe to BS 4514:
1983 (390 and 490 outlets only).
If the connection to the pipework occurs
within the thickness of a concrete slab,
Harmer Roof Detail 90º Screw outlets
are recommended.

Grates
Harmer Roof Detail 90º Spigot outlets
are designed to receive either domical
or flat grates. Flat grates should be
used if the outlet occurs in an area
which is subject to pedestrian traffic.
These grates are also designed for use
in inverted roof constructions, where
paving slabs on special Harmer paving
slab supports are used to ballast the
insulation. Rainwater drains between
the open joints of the paving to the
concealed outlets beneath.

d
Spigots are sized to suit nominal
diameter pipework shown in the
table below

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)

290

390

490

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

305

329

405

229

305

124

121

142

232

267

285

110

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

90º Screw Outlets
Harmer Roof Detail 90° Screw rainwater
outlets are designed for use with flat
roof structures using either insitu cast
concrete, timber and lightweight metal
deck construction. Harmer Roof outlets
are ideal for connection to continuous
waterproofing systems using single ply
membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof Detail 90º Screw outlets
are available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper, lead-clad roofs or
slate roofs using copper nails.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.

Flat grate (optional)

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

Connection to Pipework
90º Screw outlets have a female socket
with parallel thread to BS 21: 1985 for
direct connection to threaded tube
conforming with BS 1387: 1985. This
tube is supplied with BS 21: 1985 taper
male thread which ensures a
completely watertight joint when
screwed home into the socket outlet.

Domical grate

90º Screw outlets are particularly
recommended where a connection to
the outlet occurs within the thickness of
a concrete slab. In such cases a threaded
connection will create a completely gastight seal within the slab.
Harmer Roof Detail screw outlets can be
connected to socketed and socketless cast
iron pipework, HDPE pipework and PVC
pipework by means of the Harmer Roof
Screw Threaded Adaptor with appropriate
coupling. (See pages 6 and 26).

Grates
Harmer Roof Detail 90º Screw outlets
are designed to receive either domical
or flat grates. Flat grates should be
used if the outlet occurs in an area
which is subject to pedestrian traffic.
These grates are also designed for use
in inverted roof constructions, where
paving slabs on special Harmer paving
slab supports are used to ballast the
insulation. Rainwater drains between
the open joints of the paving to the
concealed outlets beneath.

d
Connections to suit nominal
diameter pipe sizes shown in the
table below

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)

290T

390T

490T

690T

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

(mm)
150

305

356

229

305

127

172

225

140

152

Note:
A range of accessories is available for use with special detail requirements.
See pages 24-26.

Alumasc Technical Helpline 01744 648400

Two-Way Outlets
Harmer Roof Detail Two-Way outlets are
designed for applications where an
angle is formed by the intersection of
vertical and horizontal surfaces (for
example, where a balcony or roof
meets a parapet wall). They can be
installed to provide either vertical or
horizontal take-off.
Two types are available, the regular
Two-Way and the mini Two-Way outlet.
The latter is specially designed for
connection to 50mm pipework in
situations where the drainage
requirement is small, such as domestic
balconies.
e

Materials

Two-Way outlets are available in cast
aluminium or gun metal. Gunmetal
outlets should be specified for copper
or lead-clad roofs and for connection to
copper pipework. Two-way outlets are
supplied with screw connection only.

Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.
b

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

Connection to Pipework
Two-Way outlets have a female socket
with parallel thread to BS 21: 1985 for
direct connection to threaded tube
conforming with BS 1387: 1985. This
tube is supplied with BS 21: 1985 taper
male thread which ensures a
completely watertight joint when
screwed home into the socket outlet.
Screw outlets are particularly
recommended where a connection to
the outlet occurs within the thickness
of a concrete slab. In such cases a
threaded connection, achieved by use
of a Harmer Roof Screw Thread
Adaptor, will create a completely gastight seal within the slab.

g
h

Table of Dimensions

Harmer Two-Way outlets can be
connected to socketed and socketless cast
iron pipework, HDPE pipework and PVC
pipework by means of the Harmer Roof
Screw Threaded Adaptor with appropriate
coupling. (See pages 6 and 26).

Connections to suit
nominal diameter pipe
sizes shown in the
table below

Alumasc Technical Helpline 01744 648400

Outlet ordering code

2TW-M

2TW

3TW

4TW

6TW

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

(mm)
150

125

204

280

140

214

265

130

191

250

190

255

316

107

130

181

45º

Balcony Outlets
Harmer Roof Detail Balcony outlets are
designed for use with concrete balcony
structures and are fitted with flat grates
for safe drainage in pedestrian accessed
areas. The gratings of these outlets can
be punched out to receive an incoming
rainwater pipe from above thus
providing for local as well as continuous
drainage in series. Harmer Balcony
outlets are ideal for connection to single
ply membranes, mastic asphalt or high
performance built up felt.

Materials
Harmer Roof Detail Balcony outlets are
available in cast aluminium or
gunmetal. Gunmetal outlets should be
specified for copper or lead-clad roofs
for connection to copper pipework.

a
b

Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

Connection to Pipework
Balcony outlets are suitable for direct
connection to:
■ Cast iron pipework to BS 416: 1973
or EN 877.

Spigots are sized to suit
nominal diameter
pipework shown in the
table below

f
g

■ PVC O-ring socketed pipe to
BS 4514: 1983 (3BO and 4BO outlets
only).
Flat grates can be supplied with hole
punched out to receive 50, 75 or
100mm nominal bore rainwater
downpipes. If pre-punched grates are
required, add /2H, /3H or /4H to the
code reference when ordering.
Alternatively, the hole can be cut on
site by the installer.
The Balcony outlet can be used with an
extension piece. (See pages 24 and 25).

i
h

Table of Dimensions
Outlet ordering code

2BO

3BO

4BO

Pipe dia (nominal)

(mm)
50

(mm)
75

(mm)
100

270

229

125

180

242

186

110

Alumasc Technical Helpline 01744 648400

Gulley Outlets
Harmer Roof Detail Gulley outlets
should be used in roof constructions
incorporating formed drainage
channels. They are specially designed
to suit restricted width gulleys which
are too narrow for standard outlets.

Materials
Gulley outlets are available in cast
aluminium or gunmetal. Gunmetal
outlets should be specified for copper
or lead-clad roofs and for connection to
copper pipework.
Aluminium outlets are cast in LM6
aluminium silicon alloy to BS 1490: 1988.

Gunmetal outlets are the same design as
aluminium but are cast in 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K.

Connection to Pipework
Gulley outlets have a vertical spigot and
are suitable for direct connection to:
■ Cast iron pipework to BS 416: 1973
or EN 877.
■ PVC O-ring socketed pipe to BS
4514: 1983.
The Gulley outlet can be used with an
Extension Piece. (See pages 24 and 25).

Spigots are sized to suit
nominal diameter
pipework shown in the
table below

f
c

Table of Dimensions

Alumasc Technical Helpline 01744 648400

Outlet ordering code

3GO

4GO

Pipe dia (nominal)

(mm)
75

(mm)
100
188

188

334

121

130

110

Car Park Outlets
Harmer Roof Detail Car Park outlets
have been specially designed for installation in parking decks for cars and
light commercial vehicles (ie, where
there is a maximum single wheel
loading of 1 tonne and total weight of
approximately 255 kg/m2).
The screw body is available in two
types, flanged and flangeless. The latter
is for use in situations that do not
require a waterproof membrane or seal.

Materials
Car Park outlets consist of an
aluminium vertical screw body with
raising ring, two clamping rings and
standard flat grate.

Connection to Pipework
The outlet body has a female socket
with parallel thread to BS 21: 1985 for
direct connection to threaded tube
conforming with BS 1387: 1985.

a
b

Where the outlet is to be connected to
socketed or socketless cast iron
pipework, or PVC pipework, Alumasc
will supply a special ABS adaptor in a
length to suit the thickness of the deck
construction. The adaptor is taperthreaded externally at one end to BS 21:
1985, and chamfered at the other end
to BS 4514: 1983 spigot dimensions.

c
d

The adaptor spigots are suitable for
direct connection to:
■ Cast iron pipework to BS 416: 1973
or EN 877.
■ PVC O-ring socketed pipe to BS
4514: 1983.
Harmer Roof Detail Car Park outlets are
designed for installation into either
insulated or uninsulated decks.

Table of Dimensions
Flanged
Outlet ordering code

Flangeless

400T/CP

600T/CP

400T/DD

600T/DD

Pipe dia (nominal)

(mm)
100

(mm)
150

(mm)
100

(mm)
150

380

—

305

Alumasc Technical Helpline 01744 648400

Accessories - Metal Outlets
A range of accessories is available for
use in connection with Harmer Roof
metal rainwater outlets. The
accessories are designed to permit the
installation of Harmer Roof metal
outlets in both typical and less
standard roof constructions - warm
roofs, inverted roofs, terrace
applications, and concealed under
raised paving slabs.

Terrace Grates
Terrace Grates are designed for
installation in terrace tiles or brick
paviors. They should be used in
connection with Grate Extension Pieces
which raise the Terrace Grate to the
level of the paved surface. The radius
slots in the grate allow for movement
through 90º permitting adjustment to
suit surrounding paving prior to final
tightening.

Materials
Terrace Grates are available in LM6
aluminium silicon alloy to BS 1490: 1988
or 85/5/5/5 leaded gunmetal to BS EN
1982: 1999 - CC491K for use with
aluminium or gunmetal outlets
respectively.

Terrace Grate 23TG

Terrace Grate 46TG

Grate Extension Pieces
Group 1

Grate Extension Pieces
Group 2

This group of Grate Extension Pieces is
used with the following types of outlet:

■ AV Vertical Spigot.

■ Detail Balcony.

■ AV Vertical Screw.

■ Detail Gulley.

■ AV Retro-Gulley.

These Grate Extension Pieces perform
the same function as those for AV
outlets, and Detail 45º/90º Spigot and
Screw outlets.

■ AV Multi-Gulley.
■ Detail 45º and 90º Spigot.
■ Detail 45º and 90º Screw.
They are for applications where it is
necessary to raise the level of the
grate above the body of the outlet such
as in inverted roof construction.

Materials
Grate Extension Pieces are available
in LM6 aluminium silicon alloy to
BS 1490: 1988 or 85/5/5/5 leaded
gunmetal to BS EN 1982: 1999 - CC491K
for use with aluminium or gunmetal
outlets respectively.

Both Balcony and Gulley outlet
extension pieces are available in LM6
aluminium silicon alloy to BS 1490:
1988 or 85/5/5/5 leaded gunmetal to
BS 1400: 1985 for use with aluminium
or gunmetal outlets respectively.

Connection to Outlet
The Grate Extension Pieces will accept
domical grates and terrace grates but
not standard flat grates. Terrace Grates
can be used only in connection with
grate extension pieces. The extension
pieces can be cut down if necessary to
suit the thickness of paving or tiles.
This can be done easily on site with a
hacksaw, or, if required, extension
pieces can be trimmed prior to delivery.
Grate Extension Pieces are supplied
with one set of stainless steel extension
studs per outlet.

Grate Extension Piece 23EP

Grate Extension Piece 46EP

Materials

Alumasc Technical Helpline 01744 648400

Balcony Outlet Extension Piece BO/EP

Gulley Outlet Extension Piece GO/EP

Terrace Grates (Used With Circular Grate Extension Pieces Below)

232

25
160

Code reference: 23TG
(For use with Extension Piece 23EP)

Code reference: 46TG
(For use with Extension Piece 46EP)

Grate Extension Pieces Used With AV and Circular Detail Outlets
161

233

128

150

222

Extension piece code reference: 23EP

Extension piece code reference: 46EP

Grate Extension Piece Used With Detail Balcony Outlets
220

115

Balcony outlet extension piece code reference: BO/EP

Grate Extension Piece Used With Detail Gulley Outlets
240

115

Gulley outlet extension piece code reference: GO/EP

Matching Outlets With Accessories
Accessory
code reference

Outlet
code reference

23EP

AV Outlets
AV 200, AV300, AV200T, AV300T
Detail Outlets
245, 345, 245T, 345T, 290, 390, 290T, 390T

46EP

AV Outlets
AV400, AV600, AV400T, AV600T, RAV75, RAV100, MAV75, MAV100
Detail Outlets
445, 445T, 490, 490T, 690T

BO/EP

Detail Outlets

GO/EP

Detail Outlets

2BO, 3BO, 4BO
3GO, 4GO

Alumasc Technical Helpline 01744 648400

Accessories - Metal Outlets
Screw Thread to Spigot
Adaptor

Metal Deck Support
Plates

The Screw Thread Adaptor has been
designed to facilitate the connection
of Harmer Roof AV and Detail screwthreaded metal rainwater outlets to
PVC pipework. The adaptor is suitable
for connection with all types of pipe
systems and presents an economic
alternative to using a short length of
steel gas tube to BS 1387: 1985 in the
case of cast iron socketed or
socketless systems. (See page 6).

Harmer Roof pressed Metal Support
Plates are recommended for use where
Harmer Roof metal and insulated
rainwater outlets are installed in metal
deck roof construction. They are
designed to provide a secure and stable
junction between roof deck and
rainwater outlet.
The Support Plates incorporate prepunched holes for ease of fixing. Two
sizes are available. The 335 x 335mm
plate will suit 50 and 75mm metal
outlets and all insulated outlets. The
415 x 415mm plate is designed for all
100 and 150mm metal outlets.

Materials
The Screw Thread Adaptor, made of
ABS plastic, is supplied in 305mm
lengths, taper-threaded externally at
one end to BS 21: 1985 and chamfered
at the other end to BS 4514: 1983
spigot dimensions. Sizes are available
to suit 50, 75, 100 and 150mm nominal
bore pipework.

Screw Thread Adaptors
2ADP, 3ADP, 4ADP and 6ADP

Materials
The Support Plates are manufactured
from 1.5mm (16 gauge) steel sheet,
finished in red oxide. They are suitable
for installation in all types of metal
deck roofing.

Connection to Pipework
The Screw Thread Adaptor is screwed
into the base of the outlet using a ptfe
tape to obtain a gas-tight seal. The
spigot end of the adaptor can then be
connected to the pipe socket. If
necessary, the length of the spigot end of
the adaptor can be reduced by cutting as
required with a fine toothed saw.
405

The spigots of Harmer Roof Screw
Thread Adaptors are suitable for direct
connection to:

150

■ Cast iron pipework to EN 877 and
BS 416: 1973.
■ HDPE pipework with appropriate
couplings.
■ PVC O-ring socketed pipe to
BS 4514: 1983.
Table of Dimensions
Code reference

Nominal bore A

Plan view of Harmer outlet body in the
Metal Deck Support Plate fixed to the
structural metal deck.

335

The nominal bore A of the Screw Thread
Adaptor varies in diameter, and is shown
in the table below.
Can also be made to order, maximum
600mm long.

Code reference SP1

(mm)
2ADP

3ADP

4ADP

100

6ADP

150

415

Note:
Screw Thread Adaptors are available with
a longer tail for use in deep slabs. Add
L to code reference and state required
length.
Code reference SP2

Alumasc Technical Helpline 01744 648400

Insulated Rainwater
Outlets

Alumasc Technical Helpline 01744 648400

Introduction to Harmer Insulated Outlets
Main Characteristics
Performance
Harmer Roof Insulated outlets are based
on a rigid polyurethane foam body, with
high insulation value. Harmer Roof
Insulated outlets are
therefore ideal for
installation in cold
and warm roofs,
where the requirement is to completely
eliminate any possibility of
condensation forming on the
underside of the roof outlet
as a result of cold bridging.

Polyamid Domical Grate
Push-fitted into outlet body

Flexible Connecting Membrane
Designed to form a waterproof seal with
the main roofing membrane

2
3

Integral Sump and Pipe Connection
Ensures the free flow of rainwater and
facilitates easy rodding

Designed to reduce heat loss and prevent
condensation

There are three basic body types:

■ Vertical Spigot

One-Piece Polyurethane Foam Body

Spigot Connection

■ Horizontal Spigot.
5

■ Graduated Vertical Spigot
An elastomeric bitumen connecting
membrane is fused to the polyurethane
body and is used for bonding to threelayer felts, torch-on roofing and hot
asphalt. Alternative membrane
specifications are available for PVC,
EPDM, TPO and EB roofing.

Key Benefits of Harmer Roof Insulated Outlets:
Reduction of Heat Loss
■ Consistent with upgradings in the Building Regulations regarding flat roof
U values, the high insulation value of the outlet body cuts down on heat loss.
One-Piece Leakproof Design
■ One piece polyurethane foam body provides a completely watertight
connection between roof membrane and rainwater pipe.
■ Insulated outlets are available with a flexible connecting membrane fused to
the outlet body. The outlet membrane is sealed to the flat roof waterproof
membrane, creating a completely watertight connection
with either bituminous or single ply roofing systems.
The outlets are supplied with a black
polyamid domical grate as standard.
The domical grate is simply push-fitted
into the mouth of the outlet. It is easily
removable for rodding which is further
simplified by the unobstructed throat.
A range of accessories is also available
to extend the range of roof
constructions suitable for Insulated
outlets.

Unobstructed Rainwater Flow
■ Insulated outlets incorporate a polyamid domical grate which permits a free
flow of rainwater while preventing loose chippings or debris from entering the
outlet. A flat grate option is available for certain types of application.
Optional Heating Element
■ For the highest measure of protection against ice and snow blockage and
condensation problems, Harmer Roof insulated outlets can be supplied with a
heat sensor protected electric element moulded into the body of the outlet.
The element is controlled by a heat sensor with a 1 metre length of cable for
connection to an on-site 24 volt power transformer.
■ Heated outlets are particularly suitable for installation in areas of permanent
shadow and north facing aspects.

Alumasc Technical Helpline 01744 648400

Vertical Spigot Outlets
The Harmer Roof Insulated Vertical
Spigot outlet comprises a rigid foamed
polyurethane body 22mm thick and a
495mm square elastomeric bitumen
connecting membrane fused to the
body of the outlet. This membrane
bonds to three-layer felts, torch-on
roofing and hot asphalt.
Alternative connecting membrane
specifications are available for bonding
to PVC, EPDM, TPO and EB roofing.
The outlets are supplied with a black
polyamid domical grate as standard. An
aluminium flat grate is also available,
but should be used only in inverted roof
constructions where the outlet is
covered by paving on Harmer Modulock
or Uni-Ring raised supports.

a
b

Heated outlets

An optional electric heating element**
moulded into the outlet body can also
be supplied.

Connection to Pipework
Vertical Spigot outlets are suitable for
connection to:
■ Socketed and socketless cast iron
pipework to BS 416: 1973 and EN 887.
Socketed pipework will require cold
caulking or PVC to cast iron adaptors.
■ HDPE pipework with appropriate
coupling.
■ PVC “O” ring socketed soil grade
pipe to BS 4514: 1983. Connection
can be made directly, or with heatshrink adaptors where necessary.

Spigots are sized for
direct connection to PVC,
HDPE or cast iron pipe.
Sizes are shown in the
table below

Table of Dimensions
Outlet ordering code

1000*

1001*

1003*

(For flat grate, add /F to code reference)

1004**

1005**

1007**

Pipe dia (nominal)

(mm)
75

(mm)
100

(mm)
150

495

492

339

335

192

180

110

160

* insulated outlet **heated outlet
Note:
A range of accessories is available for use with special detail requirements.
See page 32.

Alumasc Technical Helpline 01744 648400

Horizontal Spigot Outlets
The Harmer Roof Insulated Horizontal
Spigot outlet comprises a rigid foamed
polyurethane body 22mm thick and a
495mm square elastomeric bitumen
connecting membrane fused to the
body of the outlet. This membrane
bonds to three-layer felts, torch-on
roofing and hot asphalt.
Alternative connecting membrane
specifications are available for bonding
to PVC, EPDM, TPO and EB roofing.
The outlets are supplied with a black
polyamid domical grate as standard. An
aluminium flat grate is also available,
but should be used only in inverted roof
constructions where the outlet is
covered by paving on Harmer Modulock
or Uni-Ring raised supports.
a

Heated outlets

An optional electric heating element**
moulded into the outlet body can also
be supplied.

Connection to Pipework
Horizontal Spigot outlets are suitable
for connection to:
■ Socketed and socketless cast iron
pipework to BS 416: 1973 and EN 887.
Socketed pipework will require cold
caulking or PVC to cast iron adaptors.

■ HDPE pipework with appropriate
coupling.
■ PVC “O” ring socketed soil grade
pipe to BS 4514: 1983. Connection
can be made directly, or with heatshrink adaptors where necessary.

e
Spigots sized for direct connection
to PVC, HDPE or cast iron pipe.
Sizes shown in the table below

Table of Dimensions
Outlet ordering code

1008*

1009*

(For flat grate, add /F to code reference)

1011**

1012**

Pipe dia (nominal)

(mm)
75

(mm)
100

495

325

192

120

140

225

110

* insulated outlet **heated outlet
Note:
A range of accessories is available for use with special detail requirements.
See page 32.

Alumasc Technical Helpline 01744 648400

Graduated Vertical Spigot Outlets
The Harmer Roof Graduated Vertical
Spigot outlet is an economy version
of the Harmer Roof Insulated Vertical
Spigot outlet.
Graduated Vertical Spigot outlets are
particularly suitable for:
■ Roof constructions which allow only
a shallow outlet bowl.
■ Cold roofs - where the formation of
condensation on the underside of
the outlet within the ‘cold’ roof void
is unlikely, as in the case of a warm
roof design.

Materials
The thickness of the foamed
polyurethane body is reduced from
22mm to 11mm. A 495mm square
elastomeric bitumen connecting
membrane is fused to the body of the
outlet, and is bonded to three-layer
felts, torch-on roofing or hot asphalt.

a
b
c

Alternative connecting membrane
specifications are available for bonding
to PVC, EPDM, TPO and EB roofing.
The outlets are supplied with a black
polyamid domical grate as standard.

Heated outlets
d

A heated version of the graduated
spigot is not available.

Connection to Pipework
Graduated Vertical Spigot outlets are
suitable for connection to:
■ Socketed and socketless cast iron
pipework to BS 416: 1973 and EN 887.
Socketed pipework will require cold
caulking or PVC to cast iron adaptors.
■ HDPE pipework with appropriate
coupling.
■ PVC “O” ring socketed soil grade
pipe to BS 4514: 1983.

Each outlet is suitable for connection
to either 75mm or 100mm pipework.
When connecting to 100mm pipe, the
75mm section of the spigot should be
cut off. This can be done on site with a
fine-toothed saw.

g
Spigots sized for direct
connection to PVC, HDPE or
cast iron pipe. Sizes shown in
the table below

Table of Dimensions
Outlet ordering code
(For flat grate, add /F to code reference)
Pipe dia (nominal)

1017
(mm)
75 or 100

495

320

192

164

110

Note:
A range of accessories is available for use with special detail requirements.
See page 32.

Alumasc Technical Helpline 01744 648400

Accessories - Insulated Outlets
A range of accessories is available for
use in connection with Harmer Roof
insulated outlets. The accessories are
designed to permit the installation of
Harmer Roof insulated outlets in both
typical and less standard roof
constructions - warm roofs, inverted
roofs, terrace applications, and
concealed under raised paving slabs.

Extension Piece
Extension Pieces are for use in warm
roof constructions, where the
waterproof membrane occurs above the
level of the roof deck. They are
suitable for insulation thicknesses of
50-120mm.
The Extension Piece is available with a
choice of connecting membranes.

Flat Grate

Terrace Kit

Aluminium Flat Grates are also
available specifically for installation
under paving slabs set on Harmer
Modulock or Uni-Ring raised supports.
These supports enable rainwater to
drain away under paving slabs
ballasting the insulation on inverted
roofs. Because the grate occurs under
the paving slabs, there is no
obstruction whatsoever of the paved
area. Rainwater simply drains away
between the paving slab joints and
into the outlets beneath.

Designed for terrace-type applications
exposed to pedestrian traffic. The
aluminium alloy Terrace Kit consists of
a circular fitting ring which is
positioned over the mouth of the
outlet. The terrace grate then rests on
the ring and can be adjusted up or
down to 10 different heights, from 30
to 90mm, to suit varying thicknesses of
insulation and surface finish.

Insulated outlet Flat Grates should not
be used where they would be exposed
to pedestrian traffic. In such
situations, the Harmer Roof Terrace Kit
should be used.

Connecting membrane

Code reference for grate — use suffix /F
after outlet codes if flat grate is required

Code reference 1014

Connection to Outlet
The Extension Piece is sealed into the
mouth of the insulated outlet by means
of a neoprene seal. See application
detail on page 41 showing Extension
Piece with EB connecting membrane
bonded to three-layer roofing felt.
The black polyamid domical grate is
simply push-fitted in the mouth of the
Extension Piece.

Alumasc Technical Helpline 01744 648400

Code reference 1016

Application Details
and Installation

Alumasc Technical Helpline 01744 648400

Metal Rainwater Outlets
Harmer AV Vertical Spigot Outlet in Warm Roof
2 coats of asphalt
Isolating membrane
Rigid insulation
Vapour barrier
Concrete deck
Screed to falls
Alumasc coupling

Socketless aluminium downpipe

Sitework
1

Position outlet with rim 25mm above slab
and grout into pre-formed hole.

Lay sand/cement screed to falls to finish
flush with outlet rim.

Lay vapour barrier to lap edge of outlet rim.

Bond rigid insulation board to vapour barrier.

Prime roof outlet flange with bitumen
primer, then lay isolating membrane and 2
coats of asphalt. Dress asphalt into outlet.

Bolt down clamping ring and outlet grate.

Alumasc Technical Helpline 01744 648400

6
2

4
3

Harmer AV Vertical Spigot Outlet in Warm Roof
Metal faced felt
2nd layer of felt
1st layer of felt
Rigid insulation board
Timber spacing blocks

Plywood deck to fall
Firring pieces
Cast or ductile iron downpipe

Sitework
1

Drill countersunk holes in outlet rim and
screw to preservative treated timber
spacing blocks.

Place outlet in pre-formed hole and secure by
screwing through the deck into the spacing blocks.

Lay vapour barrier and rigid insulation board.

Lay three layer felt. Cut circular hole in
each layer of felt and dress into outlet.

Bolt down clamping ring and grate.

3
2

Alumasc Technical Helpline 01744 648400

Metal Rainwater Outlets
Harmer AV Vertical Spigot Outlet and Extension Piece in Inverted Roof
Gravel ballast
Rigid insulation board
2 coats of asphalt on isolating membrane
Grate extension piece

Screed to falls
Concrete deck

Cast or ductile iron downpipe

Sitework
1

Position outlet with rim 25mm above slab
and grout into pre-formed hole.

Lay sand/cement screed to falls to finish
flush with outlet rim.

7
5
6

Prime roof outlet flange with bitumen
primer, then lay isolating membrane and
2 coats of asphalt. Dress asphalt into outlet.

Bolt down clamping ring.

Bolt extension piece and grate in position.

Lay insulation board leaving circular hole
over outlet.

Lay protective gravel ballast.

Alumasc Technical Helpline 01744 648400

3
2

Harmer AV 90° Screw Outlet in Inverted Roof With Insulation
Ballasted By Paving Slabs on Harmer Uni-ring Paving Slab Supports
Paving slabs

Harmer Uni-ring paving slab support
Rigid insulation
Flat grate
Screed to falls
Concrete slab
Asphalt on isolating membrane

Sitework
1

Screw outlet to steel pipework, place in
position and test for leaks. Outlet rim to
be min 25mm above finished slab level.

Cast concrete slab.

Lay sand/cement screed to falls to finish
flush with outlet rim.

Prime roof outlet flange with bitumen
primer, then lay isolating membrane and
2 coat asphalt. Dress asphalt into outlet.

Bolt down clamping ring and flat grate.

Lay rigid insulation board, leaving hole
over outlet grate.

Place paving slabs on Harmer Uni-ring
paving slab supports.

7
6
5

4
3
2

Alumasc Technical Helpline 01744 648400

Metal Rainwater Outlets
Harmer AV Retro-Gulley Roof Refurbishment
Retaining Existing Cast Iron Outlet
2 coats of asphalt on isolating membrane
Harmer Roof AV refurbishment outlet
Clamping collar

New insulation board
Old cast iron outlet remains undisturbed
PU foam sealant between old and new outlets
Timber frame seating for refurbishment outlet
PU foam sealant injection port

Existing pipework
Refurbishment outlet tail pipe
Harmer multi-finned pipe seal

Sitework

1
2

Remove old asphalt. Leave existing cast
iron outlet and pipework in position.

Wire brush inside surfaces of old outlet
and pipework, and flush through with
clean water.

Form timber frame around old roof outlet.
Lay vapour barrier and insulation.

Check for clearance and shorten tail pipe
of Harmer Retro Gulley as necessary.
Flush through again with clean water.
Fit rubber pipe seal.

Install Harmer Retro Gulley and inject PU
foam between new and old outlet.

Lay isolating membrane and two coats of
asphalt dressed into Harmer Retro Gulley.
Bolt clamping ring and grate in position.

6
3

Alumasc Technical Helpline 01744 648400

Installing Harmer AV Retro-Gulley

1. Strip all roof coverings back to deck
level. Wire brush old outlet and flush
with clean water.

2. Form timber frame around old roof
outlet, lay vapour barrier/insulation
board (35mm+).

3. Check clearance, and cut tail pipe to
required length if necessary.

4. Once correct length of tail pipe has
been established fit Harmer pipe seal.

5. Repeat clean water flush.
Insert tail pipe into existing
pipework with flange seated
on timber frame.

6. Secure flange by screw-fixing
through pre-drilled holes.

7. Inject HARMER PU foam in one
injection port for up to 5 seconds.
Wipe away surplus foam.

8. Close off port openings with the
captive screws and washers. Complete
weatherproofing and clamping
ring/grate installation.
Alumasc Technical Helpline 01744 648400

Metal Rainwater Outlets
Harmer Detail Two-Way Outlet Installed to Provide
Horizontal Take-off From Balcony
Lead flashing
dpc

Harmer screw thread adaptor

Cavity insulation
Rigid insulation board
Vapour barrier
Concrete slab
Three layer felt
Reflective layer of chippings

Sitework

Screw Harmer screw thread adaptor to
outlet. Cut to length and fit 92.5° bend.

Build outlet in position so that horizontal
rim will be level with insulation, and vertical
rim flush with brickwork. Ensure that there
is a 2.5° fall in direction of run-off.

Lay vapour barrier and rigid insulation
board. Cut around outlet as necessary.

Lay three layer felt, dressing into mouth
of outlet.

Bolt down clamping ring and grate.

Alumasc Technical Helpline 01744 648400

5
1

4
2

Insulated Rainwater Outlets
Harmer Insulated Outlet and Extension Piece With Connecting
Membrane in Metal Deck Warm Roof
Reflective layer of chippings
Rigid insulation with integral vapour barrier

Metal deck laid to falls
Harmer metal support plate
Extension piece
Top layer of felt
2nd layer of felt
1st layer of felt

Sitework
1

Fix metal deck to falls and Harmer metal
support plate.

Position outlet in hole, bonding connecting
membrane to metal deck with bitumen.

Bond insulation with integral vapour barrier
to metal decking and roof outlet membrane.
Cut circular hole in insulation board around
outlet.

Lay first layer of felt. Cut circular hole in
felt as shown.

Press raising ring in position and bond its
membrane to first layer of felt.

Lay 2nd and 3rd layers of felt. Carefully
cut back as shown, leaving 20mm clearance
around outlet mouth.

Position domical gravel guard grating.

6
4
5
2

Alumasc Technical Helpline 01744 648400

Insulated Rainwater Outlets
Harmer Insulated Outlet With Connecting Membrane and Cut
Down Extension Piece in Inverted Roof
Protective layer of gravel
Rigid insulation
Cut down extension piece without membrane

Roof outlet with connecting membrane
Concrete slab
High performance single layer waterproof
membrane bonded to outlet connecting membrane
Screed

Sitework

Position roof outlet with rim 25mm above
slab and grout into pre-formed hole.

Lay sand/cement screed to falls, to finish
flush with outlet rim.

Lay waterproof membrane. Bond to
integral roof outlet membrane.

Lay rigid insulation board, leaving circular
hole over outlet.

Position cut-down extension piece with
domical grating.

Lay protective gravel ballast.

Alumasc Technical Helpline 01744 648400

6
5

2
1

Performance Data
and Specification

Alumasc Technical Helpline 01744 648400

Performance Data
Harmer AV Outlets
Pipe Dia

Outlet Type

Code Ref

BS EN 12056: 3: 2000 Flow Rates (litres/sec)
Domed Grate

50mm

75mm

100mm

150mm

Flat Grate

Vertical Spigot

AV200

1.69

Vertical Screw

AV200T

1.69

Vertical Spigot

AV300

4.97

Vertical Screw

AV300T

4.97

Multi-Gulley

MAV75

4.97

Retro-Gulley

RAV75

4.63

Vertical Spigot

AV400

10.71

Vertical Screw

AV400T

10.71

Multi-Gulley

MAV100

9.00

—

Retro-Gulley

RAV100

4.63

Vertical Spigot

AV600

14.07

15.61

Vertical Screw

AV600T

13.51

15.55

Harmer Detail Outlets
Pipe Dia

Outlet Type

Code Ref

50mm

45º Spigot

245

75mm

100mm

150mm

BS EN 12056: 3: 2000 Flow Rates (litres/sec)
Domed Grate

Flat Grate

1.69

45º Screw

245T

1.69

90º Spigot

290

1.69

90º Screw

290T

1.69

Mini Two-Way

2TW-M (horizontal discharge)

—

1.13

Mini Two-Way

2TW-M (vertical discharge)

—

1.69

Standard Two-Way

2TW (horizontal discharge)

—

1.69

Standard Two-Way

2TW (vertical discharge)

—

1.69

Balcony Spigot

2BO

—

1.69

45º Spigot

345

4.97

45º Screw

345T

4.97

90º Spigot

390

3.31

3.62

90º Screw

390T

3.39

3.65

Standard Two-Way

3TW (horizontal discharge)

—

1.47

Standard Two-Way

3TW (vertical discharge)

—

3.94

Balcony Spigot

3BO

—

4.97

Gulley Outlet

3GO

4.97

—

45º Spigot

445

10.66

10.71

45º Screw

445T

10.71

10.69

90º Spigot

490

7.19

6.82

90º Screw

490T

7.29

6.93

Standard Two-Way

4TW (horizontal discharge)

—

2.05

Standard Two-Way

4TW (vertical discharge)

—

6.00

Balcony Spigot

4BO

—

8.41

Gulley Outlet

4GO

10.41

—

90º Screw

690T

10.01

11.81

Standard Two-Way

6TW (horizontal discharge)

—

2.91

Standard Two-Way

6TW (vertical discharge)

—

6.37

Alumasc Technical Helpline 01744 648400

Harmer Insulated Outlets
Pipe Dia

Outlet Type

Code Ref

BS EN 12056: 3: 2000 Flow Rates (litres/sec)
Domed Grate

75mm

100mm

150mm

Flat Grate

Vertical Spigot

1000

4.97

—

Heated Vertical Spigot

1004

4.97

—

Horizontal Spigot

1008

3.49

—

Heated Horizontal Spigot

1011

3.49

—

Graduated Vertical Spigot

1017

4.97

—

Vertical Spigot

1001

6.53

—

Heated Vertical Spigot

1005

6.53

—

Horizontal Spigot

1009

6.10

—

Heated Horizontal Spigot

1012

6.10

—

Graduated Vertical Spigot

1017

6.88

—

Vertical Spigot

1003

6.49

—

Heated Vertical Spigot

1007

6.49

—

Figures in these tables are based on the requirements of BS EN 12056.
1. Flow rates are in litres per second.
2. Head of water is 35mm.
3. Performances are given within 1/3 rainwater pipe capacity limits as required by
BS EN 12056.
4. For regional rainfall characteristics contact Alumasc Technical Services.
5. For variable outlet performances specific to depth of water and rainfall intensity,
contact Alumasc Technical Services.
All flow tests have been determined by laboratory testing carried out at Salford
University’s Department of Civil Engineering.

When designing a rainwater scheme:
■ Incorporate a back-up outlet to prevent failure through blockage even though
a single outlet may be sufficient for the flow.
■ Do not design to absolute outlet capacities, but create a factor of safety of
10% to allow for greater than designed-for storm intensities.
■ Before site completion or handover ensure that all outlets have been
correctly installed.
■ Check that clamps are tight, and grates are fitted and secure.
■ Always ensure that outlets are inspected for blockages and cleaned out not
less than twice yearly.

Alumasc Technical Helpline 01744 648400

Specification
The following is a checklist of rainwater outlet components to assist the specifier
with the correct selection of parts.
Harmer Roof rainwater outlets assemblies can be varied to suit specific
applications by selecting compatible components. The checklist below links these
components into complete product assemblies with code numbers, all of which
are cross-referenced to the preceding pages.

Choice of Material
Grade LM6 Cast Aluminium
OR
Leaded Gunmetal should be specified wherever lead or copper roofing materials
are being used.

Body Type
Spigot
Screw Threaded

Choice of Outlet
AV Outlet (pages 11 to 14)
Detail Outlet (pages 16 to 23)
Insulated Outlet (pages 29 to 31)

Grating Assembly
Domical Grate (fitted as standard)
Flat Grate (suffix product code /F)
Terrace Grate (pages 24, 25 and 32)
Extension Piece (pages 24, 25 and 32)

Accessories
Threaded Spigot Adaptor (page 26)
Metal Deck Support Plate (page 26)

Model Specification Clauses
Supply and install......no. Harmer Roof AV cast aluminium, 100mm nominal bore,
vertical spigot rainwater outlets type AV400 each comprising domical grate, spigot
body and clamp ring.
OR
Supply and install......no. Harmer Roof Detail leaded gunmetal, 75mm nominal
bore, 90º screw threaded rainwater outlets type 390T/F each comprising flat
grate, screw thread body and clamp ring, complete with ABS plastic screw
threaded pipe adaptor type 3ADP.
OR
Supply and install......no. Harmer Roof Insulated, 100mm nominal bore, horizontal
spigot rainwater outlets type 1009EB complete with Extension Piece type 1014EB
all to be supplied with factory fitted EB bitumen bonding flange and adjustable
aluminium Terrace Grate assembly type 1016.

All as manufactured by Alumasc Exterior Building Products Ltd., White House Works,
Bold Road, Sutton, St. Helens, Merseyside, WA9 4JG.

Alumasc Technical Helpline 01744 648400

Alumasc Premium Products - All Brands
Alumasc provides an unrivalled range of premium products for building exteriors and
drainage, along with high levels of technical expertise and project support. Our wealth of
experience combined with networks of approved installers, merchant stockists and a
choice of warranty options ensures we provide appropriate product and system solutions
for all types of buildings.

Alumasc is the UK’s leading
manufacturer of aluminium rainwater
systems and offers a complete range of
gutters, downpipes and fascia/soffits
for both contemporary and traditional
architecture.

Rainwater
■

■

Alumasc’s cast iron rainwater system is
for historic and restoration sites, with
bespoke designs available to match or
replace existing installations.

■

Aluminium Rainwater Systems
Aluminium Fascias, Soffits and
Copings
Cast Iron Rainwater Systems

www.alumascrainwater.co.uk

Alumasc’s Harmer brand provides
market leading solutions for rainwater
handling and building drainage.

Drainage

Aluminium roof, floor and shower drains
are complemented by specialist
drainage ranges in plastic. A choice of
cast iron pipework systems is available
for internal and rainwater drainage.
Specialist rainwater management
systems and paving and deck supports
are also available.
Alumasc is a specialist provider of world
class waterproofing and green roof
systems.
The range includes Derbigum high
performance flat roof membranes,
Firestone TPO and EPDM single ply
membranes, Hydrotech structural
waterproofing and ZinCo Extensive,
Biodiverse, Semi-intensive and Intensive
green roofs.

Alumasc is a specialist in the design
and development of thermally efficient
insulated render systems. Alumasc’s
external wall insulation systems are
available with a choice of insulating
material and silicone, mineral or
polymer-modified decorative render
finishes.

■

Roof, Floor and Shower Drains

■

Cast Iron Soil & Waste Systems

■

Rainwater Management Systems

■

Paving and Decking Supports

www.alumascdrainage.co.uk

Waterproofing
■

Flat Roof Membranes

■

Single Ply Membranes

■

Structural Waterproofing

■

Green Roof Systems

www.alumascwaterproofing.co.uk

Facades
■

External Wall Insulation

■

Render Only Systems

■

Brick Slips & Specialist Systems

■

Decorative Coatings

www.alumascfacades.co.uk

Alumasc Technical Helpline 01744 648400

premium products • proven solutions

ALUMASC EXTERIOR BUILDING PRODUCTS LTD

Rainwater

White House Works, Bold Road, Sutton,

Drainage

St Helens, Merseyside, WA9 4JG
United Kingdom

Waterproofing

Telephone: +44 (0)1744 648400
Facsimile: +44 (0)1744 648401

Façades

Website: www.alumascdrainage.co.uk
E-mail: info@alumasc-exteriors.co.uk

Technical Support

Literature Hotline

+44 (0)1744 648 400

+44 (0)808 100 2008

Printed on 80%
recycled paper stock
All reasonable care has been taken in the preparation of this brochure, all information, recommendations and guidance notes on the use of The
Products are made without guarantee since the conditions of use are beyond the control of Alumasc Exterior Building Products Limited (The Company).
The customer is responsible for ensuring that each product is fit for its intended purpose and that conditions for use are suitable.
The information contained in this brochure and advice arising therefrom is free of charge and accordingly on the terms that no liability nor liability for
negligence will attach to The Company or its servants in relation to any such service arising out of or in connection with this brochure.
The Company pursues a policy of constant product development and information contained in this publication is therefore subject to change without notice.

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01 08 Book Harmer Roof Outlets

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