Shingle Roof Valley Flashing

Closed cut valley fully replaced with new metal valley flashing.

Shingle roof valley flashing.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Up to 5 3 4 in. Ice barrier underlayment installed in roof valley. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Roof one side of the valley running the shingles across it. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. This flashing provides protection for pipes cables conduits and wires. Closed valleys or open valleys.

W type valley flashing is more rigid for handling so it stays straight and it stops waler rushing down one side of a roof from rushing back up the other side. 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. Be sure to check local building codes to ensure you have the proper width for your application. Entire width of new metal flashing properly extends over fascia at bottom of roof.

Architectural shingle installation is especially critical in roof valleys where iko recommends an open valley installation. One of the details that varies between homes is the method of flashing the valley areas of the roof. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Open valleys have metal flashing to protect this critical area of the roof.

W valley flashing protects the critical area of your roof where two slopes come together to form a valley. Stop nailing 6 inches from the center. Roof mastic applied along sides of valley flashing. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

Shingle the other side of the valley the same way. Lile points out that valleys lined with roll roofing are not as durable. The soft aluminum base conforms to most metal roof panels. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter.

Shingles being removed in closed cut valley. Learn the three methods of shingling a roof valley the advantages and disadvantages of each how to choose valley flashing and how to shingle an open valley. All shingles removed from closed cut valley. To understand what makes a valley either closed or open it is important to understand how a valley is constructed.