How To Weave A Roof Valley

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How to weave a roof valley.

To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down.

Often they are dammed by debris. There are three ways to roof valleys. In downpours torrents from two planes of the roof meet. Some homeowners prefer the consistent look that a woven valley provides.

With a closed cut valley there s no need to shingle the two roof planes at the same time. But if the shingles are not laid properly in the valley a woven valley may not lay flat creating bumps and detracting from the overall look of the roof. These factors can cause water to go under nearby shingles resulting in leaks. So if you are installing a woven valley you must push the shingles snugly into the valley while not nailing within six inches of the valley center.

The woven valley shingle installation method does not call for roofing cement relying instead on the weave pattern to protect from water infiltration. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.