Roofing A Valley With Flashing

Roof one side of the valley running the shingles across it.

Roofing a valley with flashing.

One of the details that varies between homes is the method of flashing the valley areas of the roof. Closed valleys or open valleys. There are two common methods for completing the flashing of a valley in a shingle roof system. Fold the top of the flashing over the ridge.

Shingle the other side of the valley the same way. W valley flashing protects the critical area of your roof where two slopes come together to form a valley. Ensure ice and water protector has been installed along the valley first. To secure the roof valley flashing nail it down carefully.

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. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Now nail this first flashing at both its far ends.

Apply an approximately 3 inch. Next install a 36 inch wide strip of self adhering bituminous membrane in 10 to 15 foot lengths up the valley. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter. Install an underlayment centered in the roof valley.

Stop nailing 6 inches from the center. Only nail at the edges with only enough nails to. Make sure to cover the gap at the bottom of the raised ridge. Recommended procedures of basic valley flashing installation.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Step 6 install the flashing. 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. Remember to caulk the underside of the flashing with a sealant.

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. Be sure to check local building codes to ensure you have the proper width for your application. Then starting at the base of the.