Woven closed cut and open.
Shingle roof valley.
Essentially there are three main ways to shingle a roof valley.
A roof valley is formed where two roof slopes meet.
Place the nails along the edge of the valley metal not into it.
Water collects in a valley to flow off the roof.
Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks.
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.
One nail goes into the top section of the shingle where it covers the valley metal.
The open woven and closed cut methods are demonstrated.
How to shingle roof valleys gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
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.