Roof Valley Shingle Weave

Pros of woven valley shingle installations.

Roof valley shingle weave.

Woven valleys should only be used with strip shingles. Water has a small chance of even getting up under the woven valley shingles even though it flows in either direction. 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.

Closed valleys or open valleys. One of the details that varies between homes is the method of flashing the valley areas of the roof. Here we have a laminated shingle roof that has been installed with a woven valley detail. There are two common methods for completing the flashing of a valley in a shingle roof system.

To understand what makes a valley either closed or open it is important to understand how a valley is constructed. 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.