Shingling both a closed cut valley and a long island valley is the same for the first half of the process.
Roof valley weave.
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.
Some homeowners prefer the consistent look that a woven valley provides.
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.
Woven valleys should only be used with strip shingles.
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.
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.
Roof one side of the valley running the shingles across it.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Here we have a laminated shingle roof that has been installed with a woven valley detail.
Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.
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.
A woven valley is one method of installation for asphalt shingles at a valley where two intersecting roof slopes meet see featured photo above.
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.
Shingle the other side of the valley the same way.
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.
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