How To Install Roof Valley Flashing

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.

How to install roof valley flashing. 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. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. A quick step by step guide on how to flash a metal roof. Remember to caulk the underside of the flashing with a sealant.

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. Stop nailing 6 inches from the center. Step 5 begin installation. Now nail this first flashing at both its far ends.

Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. Step 6 install the. Install an underlayment centered in the roof valley.

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. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Then install a non corrosive metal valley flashing of 24 minimum width.

Architectural shingle installation is especially critical in roof valleys where iko recommends an open valley installation. 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. No one of this affirmat. Many roofers cut the shingles across because they say it s safer.

In this video i show you how i do the valleys on a shingle roof.