redland bonding gutter installation instructions 3

REDLAND DRY BONDING GUTTER

Installation Instructions for Redland Dry Bonding Gutter

Version:

3

Date: April 2013

Author: Michael McHugh/Kevin Ley

Department: Redland Technical Solutions

Redland Dry Bonding Gutter – Installation Instructions 26 April 2013 Page 1 of 8

1 Introduction

1.1 TECHNICAL DATA

Dimensions: 3 m long x 210 mm wide

Material: Glass-fibre/polyester composite.

Pitch Range: 17.5-60.

Maximum Rafter Length: 10 m. For longer rafter lengths contact Redland Technical Solutions to check

suitability (Tel. 08708 702595).

No sealing or jointing material is required if the following overlaps are used for adjoining Redland Dry

Bonding Gutter sections :

Rafter Pitch Below 22.5 22.5-29 30-39 Over 39

Overlap 350 mm 300 mm 200 mm 150 mm

1.2 DESCRIPTION

Redland Dry Bonding Gutter is a product designed for tiled pitched roofs where you want to weatherproof the

junction between two different roof coverings. It is manufactured from glass-fibre/polyester laminates in a

continuous process to two profiles:

Dry Bonding Gutter for Low Profile Tiles (9580) – with central upstand 70 mm, available in standard lead

grey colour in 3 m lengths.

Compatible with double lapped natural slates and fibre-cement slates, flat interlocking tiles including all

Redland Slate Range tiles (Cambrian Slate, Landmark Slate 10, Richmond 10, Saxon 10, Mockbond

Richmond 10, Mini Stonewold, Mockbond Mini Stonewold, Stonewold II) and Redland DuoPlain.

Dry Bonding Gutter for High Profile Tiles (9578) – with central upstand 100 mm, available in standard lead

grey colour in 3 m lengths.

Compatible with double lapped plain tiles including Redland Plain Tile, Heathland, Rosemary Clay, profiled

interlocking tiles including all Redland Profile Range tiles (Cathedral Clay Pantile, Old Hollow Clay Pantile,

Landmark Double Pantile, Landmark Double Roman, Grovebury, 50 Double Roman, Regent, Renown,

Norfolk Pantile, 49 Tile), and metal profiled sheet.

For other roof coverings please contact Redland Technical Solutions (Tel. 08708 702595) to check

suitability.

The Dry Bonding Gutters can be retro-fitted either into existing roofs or installed in new roofs.

1.3 STORAGE

The Dry Bonding Gutters can be stored outside above the ground on a flat, clean and level surface. The profiles should be stacked such that crushing and distortion is avoided and for long or indeterminate periods of storage outside the Dry Bonding Gutters should be protected with an opaque weatherproof covering.


2 Installation

2.1 GUIDANCE NOTES

Redland Dry Bonding Gutters are suitable for both traditional cold roof and warm roof construction. They can

be used wherever you want to join two different roof coverings on a pitched roof slope. Typical construction

scenarios include, but are not restricted to, adjoining roofs over fire-break masonry party walls, and also non-

fire-break walls. Typical construction details can be found in Section 2.2.

It is important when constructing bonding gutter details that the roof tiles that abut the bonding gutter lie in an

even and level plane at the same pitch as the roof tiles adjacent. Tiles that “kick up” where they meet the

bonding gutter should be avoided as this can compromise the weathertightness of the roof covering at these

junctions. The choice of Low or High Profile Dry Bonding Gutter will depend on the roof coverings to be

joined; it is recommended that the Dry Bonding Gutter chosen reflects the deepest profile tile to be joined. It

is also critical that all the tiles that abut the bonding gutter are nailed and/or clipped in accordance with the

Redland fixing specification for the roof in question.

2.2 DRY BONDING GUTTER CONSTRUCTION DETAILING

To ensure that the tiles adjacent to the Redland Dry Bonding Gutter lie in an even and level plane it is

important to follow the construction details in this section. For situations where the Bonding Gutter is

to be used over a fire-break party wall the underlay and tiling battens must be terminated either side

of the mortar-bed fire-stop. When using 25 mm tiling battens the Dry Bonding Gutter is fixed to 6 mm

WBP ply either side of the fire-stop. The thickness of the WBP ply required can be calculated as

follows: WBP ply thickness = (Tiling batten thickness – 19mm)


For situations where the Bonding Gutter is to be used over non-fire-break walls the underlay can be

carried through underneath the bonding gutter but again the tiling battens should be terminated either

side of a central 6 mm WBP plyboard, into which the Dry Bonding Gutter is fixed.


When using Redland Cathedral Clay Pantiles ensure on the side of the bonding gutter where the tiles abut either that the tiles abut uncut, or are cut at least 30 mm from crown of profile. Alternatively the WBP ply thickness can be increased to 12mm.

2.3 FIXING INSTRUCTIONS

2.3.1 INSTALLATION OF DRY BONDING GUTTER

Establish the position of the Dry Bonding Gutter. Underlay and batten the

roof in accordance with the construction details in Section 2.2. Position Dry

Bonding Gutter onto established line and nail through outer flange into 6

mm WBP ply below at maximum 500 mm centres. When joining lengths of

Dry Bonding Gutter use the minimum overlaps specified in Section 1.1.


The slates and tiles should be laid as close as possible to or touching the

central upstand on both sides with care taken to avoid any distortion and

maintain the straight line appearance of the profile. Mark the centre line of

the Dry Bonding Gutter and remove slates or tiles for cutting as required

so as to maintain the correct bond of the slating and tiling . At the ridge a

Rapid Flashing saddle should be dressed over the Dry Bonding Gutter. At

the eaves ensure the Bonding Gutter projects 50mm over the fascia board

to match the overhang of the slating and tiling.

Where the tile nibs interfere with the Dry Bonding Gutter they should be

removed.

Ensure all tiles and cut tiles adjacent to the Dry

Bonding Gutter are mechanically fixed in

accordance with the Redland fixing specification

for the roof. The standard nails and clips can be

used. For half slates and other small cut tiles

either Redland C-clip (9518) (shown adjacent),

and/or Redland Kro-clips (9142) can be used.

Complete the slating and tiling as required.


2.3.2 FINISHING OF DRY BONDING GUTTER AT EAVES

To prevent birds, insects and rodents from entering it is important to close

the cavity at the bottom of the Dry Bonding Gutter. It is recommended that

Redland Kompriband expandable foam (9467) is used to close of the

cavity as shown in the photo adjacent. Peel off the backing off the sticky

side and adhere the Kompriband to the inside bottom of the bonding

gutter.

The Kompriband foam expands to fill the available space closing the cavity

at the bottom of the Dry Bonding Gutter at the eaves.

2.3.2 FINISHING OF DRY BONDING GUTTER AT RIDGE-LINE

There are two different scenarios for finishing of the Dry Bonding Gutter at the ridge depending on

whether you want to break the ridge-line at that point in the roof or not. Reasons for breaking the

ridge-line could include the wish to use a different ridge tile on one side of the bondin g gutter,

differences in height between the new roof covering on one side of the bonding gutter and the roof

covering on the adjacent roof slope etc. For our recommended detail on finishing the Dry Bonding

Gutter where the ridge-line is to be broken see next section 2.3.2.1. For the scenario where the ridge

is continuous across the junction see section 2.3.2.2.

2.3.2.1 BREAKING THE RIDGE-LINE

Extend the Dry Bonding Gutter to the ridge apex and mitre with the

bonding gutter on the other side of the roof. Using the 370 mm wide Rapid

Flashing roll (9957) (or 560 mm wide roll (9959) if required) form a saddle

over the Dry Bonding Gutter upstand, the ridge apex and the roof tiles on

both sides of the roof; this can be carried out using two pieces if required.

Ensure that the saddle is wide enough to cover over one roll and pan of a

profiled interlocking tile and a minimum 150 mm over any flat interlocking

tile. Ensure that the saddle extends down the tile a minimum 150 mm,

increasing to 200mm for low pitched roofs or exposed roofs. Ensure the

Rapid Flashing is stuck down to the roof tiles as per fixing instructions.


At the sides of the Rapid Flashing saddle turn the free edges up to form a

welt to prevent water ingress over the sides.

Complete the ridge tiling up to the junction with the Dry Bonding Gutter

ensuring the ridge tiles are butted tightly up against the upstand of the Dry

Bonding Gutter as closely as possible.

Seal the butt joints between the ridge tiles and the upstand of the Dry

Bonding Gutter junction using Redland Rapid Flashing Sealant (9995).

2.3.2.2 CONTINUOUS RIDGE-LINE

Where the ridge is to be carried through across the junction of the Dry

Bonding Gutter it is first essential to cut and trim the Dry Bonding Gutter at

the ridge apex to allow the ridge tiles to run across the junction. This is

most easily carried out using a pair of snips as shown.


Using the 370 mm wide Rapid Flashing roll (9957) (or 560 mm wide roll

(9959) if required) form a saddle over the Dry Bonding Gutter upstand, the

ridge apex and the roof tiles on both sides of the roof; this can be carried

out using two pieces if required. Ensure that the saddle is wide enough to

cover over one roll and pan of a profiled interlocking tile and a minimum

150 mm over any flat interlocking tile and that welts are formed at the

sides as shown. Ensure that the saddle extends down the tile a minimum

150 mm, increasing to 200mm for low pitched roofs or exposed roofs.

Ensure the Rapid Flashing is stuck down to the roof tiles as per fixing

instructions.

Complete the ridge tiling over the junction in continuous fashion as per the

manufacturer’s fixing instructions using proprietary ridge seals or mortar as

required.

redland bonding gutter installation instructions 3

Documents

bonding gutter details

redland duoplain

roof tiles adjacent

redland plain tile

double lapped plain

low profile tiles

high profile tiles

flat interlocking tiles