Closed Valley Roof Installation

When finished the valley and its underlayment will be completely covered with asphalt shingles.

Closed valley roof installation.

With a metal liner nail 1 2 inch outside the liner. One layer of shingles actually crosses the valley beneath the other. Further they wear out faster than a metal valley. Punctures in the center of the valley.

Then rather than cutting the shingles on the high volume roof plane a row of shingles is installed with the exposure edge facing the valley center. It installs and looks almost the same as a regular cut valley where the shingles on the low volume roof plane are installed first and pass through the center of the valley by at least 12 in. 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. For a closed valley shingles are installed across the joint where planes intersect.

With a roll roofing valley keep the nails at least 6 inches from the valley centerline. Before the installation of a shingle roof assembly the roofing contractor installs an underlayment over the entire roof deck. Closed cut shingle valley installation. From the ground it looks as though the shingles meet in a clean line in the center of the valley.

California cut valleys make for a great closed cut valley however we have an installation trick to improve performance in areas of high winds snow or rain. What is a closed valley roof. Failure to extend the entire width of the metal valley flashing beyond the eave of the roof. Closed cut valleys are notorious for their ugly looks.

Closed cut valleys also called closed valleys are installed quickly and have a cleaner sharper look than woven valleys. Indeed the overlapping shingles make the roof look very unsightly. Avoid the following common errors. Fasteners placed in the exposed center area.

Roof mastic applied along sides of valley flashing. Closed cut valley fully replaced with new metal valley flashing. With each new course roofing shingles continue up the valley. This might lead to annoying leaks in heavy rains or at the very least a damaged roof underlayment.

Seal each shingle to the liner and overlapping shingle with a 3 inch wide bead of plastic roofing cement. 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.