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. When you reach the end of a row cut the last shingle to size before installing it. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

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. In addition it is important to avoid nailing the shingles through the valley metal. Roof one side of the valley running the shingles across it. 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.

Install the shingles so that each one is overlapping the shingle directly below it which will conceal the nails. From the ground the long island valley is indistinguishable from a cut valley. Valleys can either be open or closed open valleys are not covered with shingles closed valleys are. Attach it by driving nails into the outside edges only.

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. Install new flashing metal flashing is often called drip edge along the bottom of the roof near your gutters. A proper valley installation is a critical component of any roof ensuring the long term protection of this vulnerable area.

The two pieces should meet neatly at the corners. Shingle the other side of the valley the same way. Closed valleys are completed during shingle installation. Finish installing valley shingles by embedding each shingle into three inches 75 mm of asphalt plastic cement.

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. I install the shingles for each course with the lower corner lined up with the edge of the valley shingles. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.