Asphalt Shingle Roof Valley Flashing

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Asphalt shingle roof valley flashing.

Open valleys have metal flashing to protect this critical area of the roof. A closed cut asphalt shingle roof valley starts the same way as a woven valley with the first course of shingles run across the valley from both roof planes lapping the shingle from the larger or steeper roof plane over the shingle from the smaller shallower plane. Download pdf download dwg. Preparation of the valley with an underlayment is a critical part of your roof installation.

Ensure ice and water protector has been installed along the valley first. Stop nailing 6 inches from the center. Hire the best roofing. Then starting at the base of the valley center your first piece of flashing in the valley.

D226 sure grip ii. One of the details that varies between homes is the method of flashing the valley areas of the roof. Download pdf download dwg. Shingle the other side of the valley the same way.

Installing a closed valley a k a. To secure the roof valley flashing nail it down carefully. Installing corrosive type metal flashing in valley. The underlayment is an integral part of every valley and provides a waterproof base all valley installations require appropriate underlayment layers.

Underlay d226 roof wrap. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Roof one side of the valley running the shingles across it. Download pdf download dwg.

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 understand what makes a valley either closed or open it is important to understand how a valley is constructed. Only nail at the edges with only enough nails. The three methods to shingle a roof valley.

Closed valleys or open valleys. Asphalt shingle document library ashpalt shingle. How to shingle a valley with architectural shingles. Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.

While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. Need help with your roof repair. Download pdf downlaod dwg.