Table 11 gives the minimum recommended valley widths for different roof pitches and plan areas.
Lead valley gutter construction.
4 or 5 lead slates chimney flashings back gutters apron and side flashings parapet box and tapered gutters 5 to 8 table 3 sizing guidelines to good practice recommended maximum sizes of individual pieces of lead for the following applications.
The reason for this was that traditional wall head gutters that were made from concrete and lined with lead which can be found on many older buildings up and down the country needed the leadwork replaced.
In the old days the lead lining pieces were just lapped and water ingress was inevitable.
Decorative lead hopper head dated 1662 durham castle a rain gutter eavestrough eaves shoot or surface water collection channel is a component of a water discharge system for a building.
All three types of construction can be attractive.
We will look here at the basic installation of an open lead lined roof valley.
The width of the open valley is dependent upon the roof pitch and the volume of water expected to drain into the gutter.
The grp closed valley roof has just been refurbished.
3a flashings apron and cover.
Thin plywood linings are fitted over the valley boards to maintain a smooth finish under a lead lined valley.
A roof valley is basically a gutter set between two meeting pitched roofs.
Parapet and tapered gutters our basic fitting guides are designed to assist installing rolled lead sheet in a range of roofing applications including flashings valleys gutters and flat roofing.
Steve hempstock former chairman of the lead contractors association looks at the methods and materials involved in the production of lead gutters and identifies the most common defects their causes and how to prevent and remedy them.
Fixing of lead sheet flashings fixings to abutment walls 29 soakers and step flashings step and cover flashings and secret gutters 30 cover flashings 31 apron flashings 32 chimney flashings 33 pitched valleys 34 ridges and hips 35 mitred hip and valley soakers 36 parapet and tapered gutters 36 drips and rolls for gutters 37.
To prevent it damaging the walls drenching persons standing below or entering the building and.
Depending on the roof area it serves the valley is the exit point for a large volume of water so extreme care should be taken with installation.
It is necessary to prevent water dripping or flowing off roofs in an uncontrolled manner for several reasons.
In the photo above two of these roofs need repairing.
He focusses on lead lined parapet and valley gutters and also briefly addresses the problem of underside corrosion.
