A woven valley is one method of installation for asphalt shingles at a valley where two intersecting roof slopes meet see featured photo above.
Roof valley weave.
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.
Here we have a laminated shingle roof that has been installed with a woven valley detail.
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.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Roof one side of the valley running the shingles across it.
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.
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 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.
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.
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.
Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.