How To Shingle A Roof Valley

Roof one side of the valley running the shingles across it.

How to shingle a roof valley.

As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. Each successive shingle should be then placed with a six inch overlap or until the adhesive strip contacts the bottom of the shingle tabs. The open woven and closed cut methods are demonstrated. 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.

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. 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. The open woven and closed cut methods are demonstrated. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. Valleys are a prime leak area so it s important to be careful. Step 6 shingle valley. Shingle the other side of the valley the same way.

Extend the 3 tab shingles on one of the roof s planes past the valley at least 12 inches. Stop nailing 6 inches from the center. In addition it is important to avoid nailing the shingles through the valley metal. 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.

From this starter shingle continue moving up the valley roof. Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys. Continue until you reach the top edge of the valley roof. 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.