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.
As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.
The shingles on the second layer are then cut ideally creating a clean line down the center of the valley.
Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies.
Next i smear roof cement a couple of inches away from my snapped line.
The lowest of these valley shingles is cut back at an angle in line with the lowest course line.
Secure the cut 3 tab shingles to the valley starting at the bottom of the valley and working toward the top.
Adam and isaac share on which roof slope shingles need to be install.
Valleys are a prime leak area so it s important to be careful.
Then i install a line of shingles up the valley with the top edge aligned with my snapped line.
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.
The open woven and closed cut methods are demonstrated.
Roofers must install shingles on the right slope when installing a closed valley system.
Do not drive nails within 6 inches of the center of the valley.