Open Vs Closed Valley Roof

An open valley has a gap usually about 6 inches between the tile or shingles at the valley area.

Open vs closed valley roof.

If you have a shingled roof as most torontonians with a sloped roof tend to have then you will have one of two kinds of valleys on your home. In comparison to a closed valley an open valley adds another layer of lining into the valley. Valleys are created where two roof slopes meet. A closed valley is where the tiles or shingles are butted up against each other in the center of the valley.

Open valleys and closed valleys. For a closed valley shingles are installed across the joint where planes intersect. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. What is an open valley roof.

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. With each new course roofing shingles continue up the valley. 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. Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed.

Find out the differences before you talk to a roofing expert.