Roofing Shingles How To Install Valleys

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.

Roofing shingles how to install valleys.

A proper valley installation is a critical component of any roof ensuring the long term protection of this vulnerable area. After you have laid all of the shingles in the valley it should look uniform like the roof below. The result of this layout leaves a small triangle of the valley shingle that is exposed on each course. 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.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Install new flashing metal flashing is often called drip edge along the bottom of the roof near your gutters. In addition it is important to avoid nailing the shingles through the valley metal. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.

Finish installing valley shingles by embedding each shingle into three inches 75 mm of asphalt plastic cement. Valleys can either be open or closed open valleys are not covered with shingles closed valleys are. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Install the shingles so that each one is overlapping the shingle directly below it which will conceal the nails.

I install the shingles for each course with the lower corner lined up with the edge of the valley shingles. From the ground the long island valley is indistinguishable from a cut valley. Nail the drip edge in place using your hammer and roofing nails. Stop nailing 6 inches from the center.

Then begin nailing the shingles to the roof working in rows and starting at the edge of the roof. Attach it by driving nails into the outside edges only. 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. Closed valleys are completed during shingle installation.

Roof one side of the valley running the shingles across it. The two pieces should meet neatly at the corners. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed.