Roof Valley Shingle Weave

Closed valleys or open valleys.

Roof valley shingle weave.

Woven valleys should only be used with strip shingles. To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together. 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. Water has a small chance of even getting up under the woven valley shingles even though it flows in either direction.

To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Some homeowners prefer the consistent look that a woven valley provides. All of the shingle rows will need to be lined up correctly. 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.

One of the details that varies between homes is the method of flashing the valley areas of the roof. The woven valley shingle installation method does not call for roofing cement relying instead on the weave pattern to protect from water infiltration. For a closed valley shingles are installed across the joint where planes intersect. Here we have a laminated shingle roof that has been installed with a woven valley detail.

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. Weaving a shingle valley by dunn contracting 727 410 5717 james dunn. There are two common methods for completing the flashing of a valley in a shingle roof system.

Pros of woven valley shingle installations. With each new course roofing shingles continue up the valley.