Asphalt Shingle Roof Valley Flashing

The shingles in the valley may lose their granules and thus their coloration and protective capability faster than the rest of the roof.

Asphalt shingle roof valley flashing. Take care not to place any fasteners in the exposed center area of the metal 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. Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. A cricket or saddle should be installed on any chimney greater than 30 inches wide and can be covered with flashing or the same materials used as a roof covering.

A variation of closed cut valley. Install roofing paper membrane. Cover the rest of the roof with no. Each layer overlaps the lower one by at least 2 in.

As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. As you did with the flashing always lap upper pieces over lower pieces. Flashing requirements for asphalt shingle roofs flashings for asphalt shingles should be corrosion resistant metal with a minimum thickness of 0 019 inch. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic clip the top corner of shingles along valleys to keep water flow toward center of valley.

We can even help you find a professional to install it. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. 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. Open valleys have metal flashing to protect this critical area of the roof.

Ultimately laying any shingle in a valley can restrict proper water and debris flow unlike the metal flashing used in an open valley. Experience the total owens corning roofing system and high quality roofing shingles. Ashpalt shingle roofing installation labor basic basic labor to install asphalt shingle roof with favorable site conditions. Layout fabricate overlap and secure asphalt shingles per manufacturer instructions.

In addition it is important to avoid nailing the shingles through the valley metal. Follow this step by nailing drip edge along rakes sides of roof on top of the underlayment. 15 asphalt saturated felt underlayment some codes may require no.