Roof Valley Shingle Weave

For a closed valley shingles are installed across the joint where planes intersect.

Roof valley shingle weave.

There are two common methods for completing the flashing of a valley in a shingle roof system. 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. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Woven valleys should only be used with strip shingles.

The woven valley shingle installation method does not call for roofing cement relying instead on the weave pattern to protect from water infiltration. Weaving a shingle valley by dunn contracting 727 410 5717 james dunn. All of the shingle rows will need to be lined up correctly. Here we have a laminated shingle roof that has been installed with a woven valley detail.

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. One of the details that varies between homes is the method of flashing the valley areas of the roof. A woven valley is one method of installation for asphalt shingles at a valley where two intersecting roof slopes meet see featured photo above. With each new course roofing shingles continue up the valley.

A woven valley shingle installation is one where the shingles from both sides of the roof valley extend over the valley and weave together overlapping courses alternately. Some homeowners prefer the consistent look that a woven valley provides. Closed valleys or open valleys. 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.

It is a method where the valley is completed by overlapping and weaving the shingle courses rather than cutting the shingles back to form a trough lined with a sheet metal flashing see figure wv 1. This is an incorrect installation of this type of roofing material and will be more prone to water intrusion and will void the manufacturer s warranty for this material.