Shingle Roof Valley Detail

Water collects in a valley to flow off the roof.

Shingle roof valley detail.

A roof valley is formed where two roof slopes meet. Woven closed cut and open. Videos are intended for u s users only unless otherwise noted. Valleys are a prime leak area so it s important to be careful.

This video demonstrates the proper installation technique for installing roofing valleys. Extend the end of each shingle at least 12 inches beyond the valley centerline and avoid placing any butt joints near the valley center. There are two common methods for completing the flashing of a valley in a shingle roof system. 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.

The open woven and closed cut methods are demonstrated. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. 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. How to shingle roof valleys gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.

Essentially there are three main ways to shingle a roof valley. One of the details that varies between homes is the method of flashing the valley areas of the roof. Closed valley s or open valleys.