Western Cut Roof Valley

Cut each side at the upper end of the valley to conform with the corresponding slopes of the roof.

Western cut roof valley. Further they wear out faster than a metal valley. I have my valley custom made with water trough to help with leaking b. Alternatives for the closed cut valley installation are the woven metal open cut and long island installation. A chalk line is then used to strike a line from the top of the valley to the bottom of the valley.

The top joinery of both valleys when they meet on the same plane of roof is shown here. The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment. Provided the rest of the roofing shingles were properly installed and are performing properly my experience has been that an open valley system holds up better over time tessaro says. These disadvantages are neutralized by their simplicity of installation.

Attach the valley in place with 1 1 4 inch roofing nails and a shingle hatchet or hammer. This might lead to annoying leaks in heavy rains or at the very least a damaged roof underlayment. It is essential to only use whole not cut shingles during this step. Roofing shingles are installed then cut and sealed where they overlap the metal channel.