Roofers must install shingles on the right slope when installing a closed valley system.
How to lace singles in tee valleys on a roof.
When i ve finished shingling the first roof plane i snap a chalkline 2 in to 3 in.
The open woven and closed cut methods are demonstrated.
The shingles on the second layer are then cut ideally creating a clean line down the center of the valley.
Next i smear roof cement a couple of inches away from my snapped line.
As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.
Do not drive nails within 6 inches of the center of the valley.
Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
Adam and isaac share on which roof slope shingles need to be install.
The lowest of these valley shingles is cut back at an angle in line with the lowest course line.
Away from the valley center just as i did with the closed cut valley.
Valleys are a prime leak area so it s important to be careful.
Drive the 1 inch roofing nails into the part of the cut shingle extending out into the roof s plane and press the part of the cut shingle in the valley into the roofing cement.
Asphalt shingles roofing how to install valley by roofrepair101 more about roof installation at.