Roofing Shingles How To Install Valleys

From the ground the long island valley is indistinguishable from a cut valley.

Roofing shingles how to install valleys.

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. When you reach the end of a row cut the last shingle to size before installing it. Stop nailing 6 inches from the center. A proper valley installation is a critical component of any roof ensuring the long term protection of this vulnerable area.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. 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 result of this layout leaves a small triangle of the valley shingle that is exposed on each course. Roof one side of the valley running the shingles across it.

Install the shingles so that each one is overlapping the shingle directly below it which will conceal the nails. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. Attach it by driving nails into the outside edges only. Shingle the other side of the valley the same way.

Drive nails at high points on the underlying roof the bottoms of the shingles. Nail the drip edge in place using your hammer and roofing nails. Finish installing valley shingles by embedding each shingle into three inches 75 mm of asphalt plastic cement. Install new flashing metal flashing is often called drip edge along the bottom of the roof near your gutters.

However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. After you have laid all of the shingles in the valley it should look uniform like the roof below. The two pieces should meet neatly at the corners. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

Valleys can either be open or closed open valleys are not covered with shingles closed valleys are. Closed valleys are completed during shingle installation. I install the shingles for each course with the lower corner lined up with the edge of the valley shingles.