Roof Valley Weave

To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.

Roof valley weave. 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. A woven valley is one method of installation for asphalt shingles at a valley where two intersecting roof slopes meet see featured photo above. Woven valleys should only be used with strip shingles. Shingle the other side of the valley the same way.

Pros of woven valley shingle installations. 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. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. But if the shingles are not laid in the valley properly a woven valley may not lay flat creating bumps and detracting from the overall look of the roof.

All of the shingle rows will need to be lined up correctly. A closed cut asphalt shingle roof valley starts the same way as a woven valley with the first course of shingles run across the valley from both roof planes lapping the shingle from the larger or steeper roof plane over the shingle from the smaller shallower plane. Stop nailing 6 inches from the center. 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.

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. Some homeowners prefer the consistent look that a woven valley provides. For the next two shingling methods closed cut and long island valleys i work out of the valley using laminated shingles instead of working toward the valley with three tab shingles. 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.