Install Flashing On Roof Valley

Drip flashing also called drip edge this type of flashing is installed on the edge of roofs and helps guide water away from your roof and into your gutters.

Install flashing on roof valley. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Flashing should be installed in all of the valleys.

Shingle the other side of the valley the same way. 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. Remember to caulk the underside of the flashing with a sealant.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. Stop nailing 6 inches from the center. Valley flashing this flashing is usually formed in a v or w shape and is used where two different roof planes meet forming a valley.

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. Installing metal flashing for your roof project is a challenging but essential step to take to ensure that the new roof remains as weatherproof and as strong as possible the following steps will explain how to install metal flashing in roof valleys. Roof installation how to shingle a valley hd by roofrepair101 more about roofing at. 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.

Roof one side of the valley running the shingles across it. Architectural shingle installation is especially critical in roof valleys where iko recommends an open valley installation. One of the details that varies between homes is the method of flashing the valley areas of the roof. Step 5 begin installation.

Step 6 install the. Then install a non corrosive metal valley flashing of 24 minimum width. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Install an underlayment centered in the roof valley.