Roof Valley Shingle Weave

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

Roof valley shingle weave.

The woven valley shingle installation method does not call for roofing cement relying instead on the weave pattern to protect from water infiltration. 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. 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. Water has a small chance of even getting up under the woven valley shingles even though it flows in either direction.

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. Closed valleys or open valleys. Weaving a shingle valley by dunn contracting 727 410 5717 james dunn.

Pros of woven valley shingle installations. All of the shingle rows will need to be lined up correctly.