Open Valley Roofing

This video demonstrates the proper installation technique for installing roofing valleys.

Open valley roofing.

The open woven and closed cut methods are demonstrated. 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. Once the shingles are installed they don t run through the valley area.

After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. This metal lining can be made of any type of metal that is resistant to the effects of weather acid rain or other contaminants. That flashing is left exposed so the roof has visible lines of metal running down the valley. Open valley when compared to a closed valley and open valley adds an additional layer of lining.

This leaves a metal strip or line on the surface of the roof that serves as the valley line. This valley flashing material can be manufactured from any metal that will resist the effects of weather acid rain and other contaminants. In comparison to a closed valley an open valley adds another layer of lining into the valley. After the underlayment is placed a pre bent metal valley lining is installed.