How To Install Flashing On Roof Valley

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

How to install flashing on roof valley.

Remember to caulk the underside of the flashing with a sealant. Many roofers cut the shingles across because they say it s safer. W type valley flashing is more rigid for handling so it stays straight and it stops waler rushing down one side of a roof from rushing back up the other side. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.

Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present. Now nail this first flashing at both its far ends. Shingle the other side of the valley the same way.

Architectural shingle installation is especially critical in roof valleys where iko recommends an open valley installation. Roof one side of the valley running the shingles across it. Step 5 begin installation. Install an underlayment centered in the roof valley.

In this video i show you how i do the valleys on a shingle roof. Learn the three methods of shingling a roof valley the advantages and disadvantages of each how to choose valley flashing and how to shingle an open valley. Stop nailing 6 inches from the center. Step 6 install the.

Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. Then install a non corrosive metal valley flashing of 24 minimum width.