Asphalt Shingle Roof Valley Flashing

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.

Asphalt shingle roof valley flashing.

Closed valleys or open valleys. The underlayment is an integral part of every valley and provides a waterproof base all valley installations require appropriate underlayment layers. Open valleys have metal flashing to protect this critical area of the roof. Download pdf downlaod dwg.

To secure the roof valley flashing nail it down carefully. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Failure to extend the entire width of the metal valley flashing beyond the eave of the roof. Only nail at the edges with only enough nails.

One of the details that varies between homes is the method of flashing the valley areas of the roof. Installing laced shingles in a roof valley when shingle manufacturer does not approve of. Underlay d226 roof wrap. Then starting at the base of the valley center your first piece of flashing in the valley.

How to shingle a valley with architectural shingles. Download pdf download dwg. There are two common methods for completing the flashing of a valley in a shingle roof system. Stop nailing 6 inches from the center.

Preparation of the valley with an underlayment is a critical part of your roof installation. Installing corrosive type metal flashing in valley. Ensure ice and water protector has been installed along the valley first. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

The three methods to shingle a roof valley. D226 sure grip ii. Download pdf download dwg. To understand what makes a valley either closed or open it is important to understand how a valley is constructed.

Asphalt shingle document library ashpalt shingle. Roof one side of the valley running the shingles across it. Hire the best roofing. Need help with your roof repair.

Installing a closed valley a k a. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.