Open Valley Roofing

That flashing is left exposed so the roof has visible lines of metal running down the valley.

Open valley roofing.

This leaves a metal strip or line on the surface of the roof that serves as the valley line. In comparison to a closed valley an open valley adds another layer of lining into the valley. Lile points out that valleys lined with roll roofing are not as durable. This metal lining can be made of any type of metal that is resistant to the effects of weather acid rain or other contaminants.

After the underlayment is placed a pre bent metal valley lining is installed. 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. Open valley shingle installation an open valley relies on metal flashing for protection. 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. Once the shingles are installed they don t run through the valley area. This valley flashing material can be manufactured from any metal that will resist the effects of weather acid rain and other contaminants. The open woven and closed cut methods are demonstrated.