Shingle Roof Valley Detail

A roof valley is formed where two roof slopes meet.

Shingle roof valley detail.

Woven closed cut and open. How to shingle roof valleys 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. On the first course across the valley the shingle from the larger or steeper roof plane overlaps the shingle from the smaller or shallower plane.

To understand what makes a valley either closed or open it is important to understand how a valley is constructed. 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. Water collects in a valley to flow off the roof. The open woven and closed cut methods are demonstrated.

Extend the end of each shingle at least 12 inches beyond the valley centerline and avoid placing any butt joints near the valley center. Closed valley s or open valleys. Videos are intended for u s users only unless otherwise noted. Essentially there are three main ways to shingle a roof valley.

Valleys are a prime leak area so it s important to be careful. One of the details that varies between homes is the method of flashing the valley areas of the roof. The open woven and closed cut methods are demonstrated.