Open Valley Roofing

This leaves a metal strip or line on the surface of the roof that serves as the valley line.

Open valley roofing.

After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing is used. This video demonstrates the proper installation technique for installing roofing valleys. The open woven and closed cut methods are demonstrated.

After the underlayment is placed a pre bent metal valley lining is installed. Nrca lile recommends that roof valley flashing metal for open roof valleys should be 26 gauge 0 45mm galvanized steel or equivalent noncorrosive nonstaining metal. Open valley shingle installation an open valley relies on metal flashing for protection. Lile points out that valleys lined with roll roofing are not as durable.

This valley flashing material can be manufactured from any metal that will resist the effects of weather acid rain and other contaminants. Open roof valley this is almost the same as the closed roof valley method except a pre bent metal valley lining is installed instead of a secondary roof underlayment. Once the shingles are installed they don t run through the valley area. Open valley when compared to a closed valley and open valley adds an additional layer of lining.