Open Vs Closed Valley Roof

With each new course roofing shingles continue up the valley.

Open vs closed valley roof.

For a closed valley shingles are installed across the joint where planes intersect. An open valley has a gap usually about 6 inches between the tile or shingles at the valley area. Furthermore the description of the roofing company whose closed valley failed seemed to fit the profile of a fly by night roofing company and so i d have to assume that workmanship and expertise was secondary to making a quick buck. Find out the differences before you talk to a roofing expert.

Valleys are created where two roof slopes meet. In comparison to a closed valley an open valley adds another layer of lining into the valley. There are two methods for sealing valleys. Moving on here are a couple of things to think about when deciding open or closed.

Open valleys and closed valleys. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. A closed valley is where the tiles or shingles are butted up against each other in the center of the valley. Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed.

According to long time iko sales representative jeff tessaro closed valleys for residential construction have been popular since he was a roofing contractor in the late 90 s.