Asphalt Shingle Roof Valley Flashing

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

Asphalt shingle roof valley flashing.

Preparation of the valley with an underlayment is a critical part of your roof installation. Failure to extend the entire width of the metal valley flashing beyond the eave of the roof. Asphalt shingle document library ashpalt shingle. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. One of the details that varies between homes is the method of flashing the valley areas of the roof. To secure the roof valley flashing nail it down carefully. There are two common methods for completing the flashing of a valley in a shingle roof system.

Installing corrosive type metal flashing in valley. Need help with your roof repair. Stop nailing 6 inches from the center. Closed valleys or open valleys.

While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. D226 sure grip ii. Download pdf download dwg. Shingle the other side of the valley the same way.

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. The underlayment is an integral part of every valley and provides a waterproof base all valley installations require appropriate underlayment layers. Then starting at the base of the valley center your first piece of flashing in the valley. Ensure ice and water protector has been installed along the valley first.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Only nail at the edges with only enough nails. How to shingle a valley with architectural shingles. Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.

To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Installing a closed valley a k a. Download pdf download dwg. Download pdf download dwg.

Open valleys have metal flashing to protect this critical area of the roof. Download pdf downlaod dwg. Installing laced shingles in a roof valley when shingle manufacturer does not approve of.