Roofing A Valley With Flashing

If eaves flashing is used it should cross the valley centerline each way and be installed before the valley underlayment see eaves flashing discussed in roofing underlayment best practices.

Roofing a valley with flashing.

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. Now nail this first flashing at both its far ends. Install an underlayment centered in the roof valley. Step 6 install the flashing.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Fold the top of the flashing over the ridge. W valley flashing protects the critical area of your roof where two slopes come together to form a valley. Apply an approximately 3 inch.

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. Only nail at the edges with only enough nails to. Next install a 36 inch wide strip of self adhering bituminous membrane in 10 to 15 foot lengths up the valley. To secure the roof valley flashing nail it down carefully.

Ensure ice and water protector has been installed along the valley first. Closed valleys or open valleys. There are two common methods for completing the flashing of a valley in a shingle roof system. Cut the bottom edge and fold it down over the drip edge.

Recommended procedures of basic valley flashing installation. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Stop nailing 6 inches from the center. Then starting at the base of the.

Make sure to cover the gap at the bottom of the raised ridge. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. 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. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Shingle the other side of the valley the same way. Roof one side of the valley running the shingles across it. Remember to caulk the underside of the flashing with a sealant.