How To Build A Lead Roof Valley

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.

How to build a lead roof valley.

This recommendation includes iko s premium shingles. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. 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.

There are occasions when a roof valley is in good condition but the cement holding the tiles in place has washed out or crumbled. To replace a 4metre long zinc or swept valley on a slated or tiled roof with a nice new lead one. This should be laid in two 1500mm lengths with a third length at the top. It is therefore worth asking the valley manufacturer for guidance on this.

Framing a complex roof is one of the trickiest parts of home building. We will look here at the basic installation of an open lead lined roof valley. Installation procedures differ depending on the roof type and materials used. 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.

The three methods to shingle a roof valley. Roof valleys are a frequent source of leaks in older houses. A roof valley is basically a gutter set between two meeting pitched roofs. Some grp valleys are sufficiently robust to enable them to be laid directly over the rafters rather than being supported on valley boards.

In these circumstances it may be possible to just leave the existing valley base in place and replace only the cement. Check the entire roof valley carefully to locate the source of these problems. 450mm wide code 4 lead should be used turned back at the edges.