How To Roof A Valley With Flashing

Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.

How to roof a valley with flashing.

From drip edge to valley flashing december 25 2018 drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies. This video shows the water proofing paper that we installed after re. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. To secure the roof valley flashing nail it down carefully.

Stop nailing 6 inches from the center. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Then starting at the base of the valley center your first piece of flashing in the valley. Fold the top of the flashing over the ridge and nail it off every ten inches or so along the outer edge of the flashing now this valley will carry water off the roof and away from the house.

Only nail at the edges with only enough nails to hold it in place. Shingle the other side of the valley the same way. Roof one side of the valley running the shingles across it. Nrca lile recommends that roof valley flashing metal for open roof valleys should be 26 gauge 0 45mm galvanized steel or equivalent noncorrosive nonstaining metal.

Punctures in the center of the valley. Avoid the following common errors. Open valleys have metal flashing to protect this critical area of the roof. Roof mastic applied along sides of valley flashing.

Closed cut valley fully replaced with new metal valley flashing. Valley flashing is metal or sometimes peel and stick material that protects an important area on the roof where two slopes come together to form a valley. Extra nails may increase the risk of leaks. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch overlap.

Fasteners placed in the exposed center area. Lile points out that valleys lined with roll roofing are not as durable. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.