Many roofers cut the shingles across because they say it s safer.
Woven roof valley installation.
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.
Pros of woven valley shingle installations.
Here we have a laminated shingle roof that has been installed with a woven valley detail.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Some homeowners prefer the consistent look that a woven valley provides.
Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.
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But if the shingles are not laid properly in the valley a woven valley may not lay flat creating bumps and detracting from the overall look of the roof.
A woven valley is one method of installation for asphalt shingles at a valley where two intersecting roof slopes meet see featured photo above.
Some homeowners prefer the consistent look that a woven valley provides.
Water has a small chance of even getting up under the woven valley shingles even though it flows in either direction.
In this video i show you how i do the valleys on a shingle roof.
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.
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.
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.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Woven valleys woven valleys are constructed by interlacing the rows of shingles from intersecting roof planes.
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.
This system is acceptable with three tab and low profile architectural shingles and valley slopes greater than 4 12 18 degrees.
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.
