Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
How to lace singles in tee valleys on a roof.
The shingles on the second layer are then cut ideally creating a clean line down the center of the valley.
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.
Roofers must install shingles on the right slope when installing a closed valley system.
Away from the valley center just as i did with the closed cut valley.
Do not drive nails within 6 inches of the center of the valley.
The lowest of these valley shingles is cut back at an angle in line with the lowest course line.
Valleys are a prime leak area so it s important to be careful.
As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.
Adam and isaac share on which roof slope shingles need to be install.
When i ve finished shingling the first roof plane i snap a chalkline 2 in to 3 in.
Secure the cut 3 tab shingles to the valley starting at the bottom of the valley and working toward the top.
Then i install a line of shingles up the valley with the top edge aligned with my snapped line.
Next i smear roof cement a couple of inches away from my snapped line.