Roofing Shingles How To Install Valleys

When you reach the end of a row cut the last shingle to size before installing it.

Roofing shingles how to install valleys.

The two pieces should meet neatly at the corners. Attach it by driving nails into the outside edges only. Stop nailing 6 inches from the center. In addition it is important to avoid nailing the shingles through the valley metal.

Nail the drip edge in place using your hammer and roofing nails. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. The result of this layout leaves a small triangle of the valley shingle that is exposed on each course. I install the shingles for each course with the lower corner lined up with the edge of the valley shingles.

Shingle the other side of the valley the same way. Then begin nailing the shingles to the roof working in rows and starting at the edge of the roof. 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.

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

As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. From the ground the long island valley is indistinguishable from a cut valley. 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.

Roof one side of the valley running the shingles across it. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Drive nails at high points on the underlying roof the bottoms of the shingles.