How To Build A Lead Roof Valley

Check the entire roof valley carefully to locate the source of these problems.

How to build a lead roof valley.

This roof valley is a perfect example. In these circumstances it may be possible to just leave the existing valley base in place and replace only the cement. There are occasions when a roof valley is in good condition but the cement holding the tiles in place has washed out or crumbled. The three methods to shingle a roof valley.

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. Installation procedures differ depending on the roof type and materials used. The overlaps should be 150mm minimum and the only fixings should be a few copper nails under the overlaps. This recommendation includes iko s premium shingles.

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. Framing a complex roof is one of the trickiest parts of home building. A roof valley is basically a gutter set between two meeting pitched roofs. It is therefore worth asking the valley manufacturer for guidance on this.

This should be laid in two 1500mm lengths with a third length at the top. To replace a 4metre long zinc or swept valley on a slated or tiled roof with a nice new lead one. The roofing nails are fine so long as the lead of the roof valley is intact but once it starts to crack or fracture due to water pressure corrosion or other damage the nail provides a space for water to run into the home. Roof valleys are a frequent source of leaks in older houses.

450mm wide code 4 lead should be used turned back at the edges. 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. But it doesn t have to be.