How To Build A Lead Roof Valley

There are occasions when a roof valley is in good condition but the cement holding the tiles in place has washed out or crumbled.

How to build a lead roof valley.

This should be laid in two 1500mm lengths with a third length at the top. Preformed grp valleys in many ways the roof construction for a pre formed grp valley is the same as that for a lead lined valley. We will look here at the basic installation of an open lead lined roof valley. Some grp valleys are sufficiently robust to enable them to be laid directly over the rafters rather than being supported on valley boards.

Installation procedures differ depending on the roof type and materials used. Check the entire roof valley carefully to locate the source of these problems. To replace a 4metre long zinc or swept valley on a slated or tiled roof with a nice new lead one. The overlaps should be 150mm minimum and the only fixings should be a few copper nails under the overlaps.

This roof valley is a perfect example. Framing a complex roof is one of the trickiest parts of home building. If you begin with accurate as built measurements and use a construction calculator to do the math you can cut all of the rafters for most roofs on the ground in just one shot. 450mm wide code 4 lead should be used turned back at the edges.

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. The three methods to shingle a roof valley. Roof valleys are a frequent source of leaks in older houses. It is therefore worth asking the valley manufacturer for guidance on this.

In these circumstances it may be possible to just leave the existing valley base in place and replace only the cement. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. But it doesn t have to be.