How To Shingle A Roof Valley

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

How to shingle a roof valley.

From this starter shingle continue moving up the valley roof. Valleys are a prime leak area so it s important to be careful. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. Secure all of the 3 tab shingles to the roof plane with the 1 inch roofing nails using the local building codes as a placement guide except for the shingles covering the flashing material.

Extend the 3 tab shingles on one of the roof s planes past the valley at least 12 inches. The next shingle should be directly atop the first one. The open woven and closed cut methods are demonstrated. Stop nailing 6 inches from the center.

Roof one side of the valley running the shingles across it. In addition it is important to avoid nailing the shingles through the valley metal. Shingle the other side of the valley the same way. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

The open woven and closed cut methods are demonstrated. A woven valley shingle installation has other drawbacks including that they are slow to install especially in cold weather and more difficult to repair than the other types. In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow. 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.

Continue until you reach the top edge of the valley roof. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. This video demonstrates the proper installation technique for installing roofing valleys. Each successive shingle should be then placed with a six inch overlap or until the adhesive strip contacts the bottom of the shingle tabs.