Place the nails along the edge of the valley metal not into it.
Shingle roof valley.
How to shingle roof valleys gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
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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.
A roof valley is formed where two roof slopes meet.
The open woven and closed cut methods are demonstrated.
One nail goes into the top section of the shingle where it covers the valley metal.
Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
Valleys are a prime leak area so it s important to be careful.
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.
Woven closed cut and open.
Water collects in a valley to flow off the roof.