Roofing Shingles How To Install Valleys

After you have laid all of the shingles in the valley it should look uniform like the roof below.

Roofing shingles how to install valleys.

Then begin nailing the shingles to the roof working in rows and starting at the edge of the roof. Finish installing valley shingles by embedding each shingle into three inches 75 mm of asphalt plastic cement. Closed valleys are completed during shingle installation. Step 6 install valley flashing if you have an open valley install new w shape metal or vinyl valley flashing to fit directly over the old flashing.

A proper valley installation is a critical component of any roof ensuring the long term protection of this vulnerable area. Drive nails at high points on the underlying roof the bottoms of the shingles. The result of this layout leaves a small triangle of the valley shingle that is exposed on each course. If your roof will have open valleys which iko recommends now is when the valleys should be lined with a pre formed width of corrosion resistant metal.

The two pieces should meet neatly at the corners. Valleys can either be open or closed open valleys are not covered with shingles closed valleys are. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. Shingle the other side of the valley the same way.

Attach it by driving nails into the outside edges only. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Always install flashing around a chimney and other valleys where two roof planes meet as these areas are more prone to leaks if not protected. 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. Install the shingles so that each one is overlapping the shingle directly below it which will conceal the nails. When you reach the end of a row cut the last shingle to size before installing it. Stop nailing 6 inches from the center.

From the ground the long island valley is indistinguishable from a cut valley. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. I install the shingles for each course with the lower corner lined up with the edge of the valley shingles.