How To Install Flashing On Roof Valley

Now nail this first flashing at both its far ends.

How to install flashing on roof valley.

Remember to caulk the underside of the flashing with a sealant. In this video i show you how i do the valleys on a shingle roof. 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. Shingle the other side of the valley the same way.

Step 6 install the. 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 an underlayment centered in the roof valley. Then install a non corrosive metal valley flashing of 24 minimum width.

Roof one side of the valley running the shingles across it. 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. Step 5 begin installation. Stop nailing 6 inches from the center.

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. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Architectural shingle installation is especially critical in roof valleys where iko recommends an open valley installation.

Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.