Valleys are a prime leak area so it s important to be careful.
How to shingle a roof valley video.
Over driving nails is always a.
Nail down each valley shingle at least two inches 50 mm back from the chalk line.
Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof.
Asphalt shingles roofing how to install valley by roofrepair101 more about roof installation at.
I then move the shingle to the uppermost course on the roof plane line up the mark on the shingle with the valley center and again mark the corner.
The open woven and closed cut methods are demonstrated.
You can use a straight edge to achieve a straight cut.
The most common closed valley is a closed cut valley where shingles are installed on the entire roof area on one side of the valley first with each shingle course extending at least 12 through the valley centerline.
When you reach the valley lay the shingles over the valley and trim the edges to the chalk line.
Begin to install roof shingles on either roof face.