Here we have a laminated shingle roof that has been installed with a woven valley detail.
Roof valley weave.
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.
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.
Woven valleys should only be used with strip shingles.
Shingling both a closed cut valley and a long island valley is the same for the first half of the process.
Shingle the other side of the valley the same way.
Stop nailing 6 inches from the center.
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.
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.
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.
Some homeowners prefer the consistent look that a woven valley provides.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
All of the shingle rows will need to be lined up correctly.
A woven valley is one method of installation for asphalt shingles at a valley where two intersecting roof slopes meet see featured photo above.
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.
Pros of woven valley shingle installations.
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