Closed Valley Roof Installation

Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.

Closed valley roof installation.

With a metal liner nail 1 2 inch outside the liner. Further they wear out faster than a metal valley. Fasteners placed in the exposed center area. Closed cut valley fully replaced with new metal valley flashing.

With each new course roofing shingles continue up the valley. Roof mastic applied along sides of valley flashing. Punctures in the center of the valley. One layer of shingles actually crosses the valley beneath the other.

Incorporated into the underlayment may be a self adhering ice and water shield or another type of underlayment that is a heavier gauge than the underlayment that covers the remainder of the. With a roll roofing valley keep the nails at least 6 inches from the valley centerline. 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. 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.

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. Closed cut valley installation details for asphalt shingle roofs. This might lead to annoying leaks in heavy rains or at the very least a damaged roof underlayment. 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. Avoid the following common errors. Closed cut valleys also called closed valleys are installed quickly and have a cleaner sharper look than woven valleys. What is a closed valley roof.

Indeed the overlapping shingles make the roof look very unsightly. 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. Closed cut valleys are notorious for their ugly looks. For a closed valley shingles are installed across the joint where planes intersect.

Seal each shingle to the liner and overlapping shingle with a 3 inch wide bead of plastic roofing cement. When finished the valley and its underlayment will be completely covered with asphalt shingles.