As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.
How to weave shingles in a roof valley.
Asphalt shingles roofing how to install valley by roofrepair101 more about roof installation at.
Away from the valley center.
However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed.
All of the shingle rows will need to be lined up correctly.
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.
One layer of shingles actually crosses the valley beneath the other.
But after that i run the shingles up the valley aligning the top edges with the course lines and the top outside corners with the guide line.
In addition it is important to avoid nailing the shingles through the valley metal.
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.
Woven valleys should only be used with strip shingles.
California cut valleys make for a great closed cut valley however we have an installation trick to improve performance in areas of high winds snow or rain.
I nail the shingles normally except that i keep nails at least 6 in.
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.
Pros of woven valley shingle installations.
Here we have a laminated shingle roof that has been installed with a woven valley detail.
From the ground it looks as the shingles meet in a clean line in the center of the valley.
Now i m ready for the other roof plane.
I always weave my first course.
Water has a small chance of even getting up under the woven valley shingles even though it flows in either direction.