Roofs With Closed Valleys

The main advantage of closed valleys is that they protect the roof from snow and ice build up however in florida this is not an issue that needs to be considered.

Roofs with closed valleys.

Closed cut valleys also called closed valleys are installed. Woven valley shingle installation. It is popular because the two roof planes do not need to be shingled at the same time. The three methods to shingle a roof valley.

In general the closed cut valley method implies stretching one side of the shingles beyond the valley while those on the other side are trimmed. 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. The shingles act as the valley lining and protect the surface from water runoff. In the closed valley method the shingles are installed onto the roof.

The closed variation is a flashing that has been completely covered with shingles while in the open variation will have the flashing completely exposed to the elements. 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. When finished the valley and its underlayment will be completely covered with asphalt shingles.

With each new course roofing shingles continue up the valley. If you are looking to install shingles you might want to consider the closed cut valley method. For a closed valley the roofer will install the shingles onto the roof deck and extend the asphalt shingles through the area where opposing roof planes meet so that the shingles cover or close the valley area. To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them.

Closed cut shingle valley installation. 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. Roofing material manufactures or roofing associations may have recommended installation guidelines for their products or for various roofing materials. If you are installing a closed valley the roofer will install shingles to the roof deck and extend the shingles through the valley so that it covers the entire valley area.

Closed valleys protect the roof lining from abrasion that water run off would cause and are therefore quite durable options. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. The shingles completely cover the underlayment and they become the valley lining itself. This essentially extends the asphalt shingles through the valley so the roof surface covers or closes the valley area hence the name.

With a closed cut valley there s no need to shingle the two roof planes at the same time.