Asphalt Shingle Roof Valley Flashing

Install roofing paper membrane.

Asphalt shingle roof valley flashing. Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles. Each layer overlaps the lower one by at least 2 in. Ashpalt shingle roofing installation labor basic basic labor to install asphalt shingle roof with favorable site conditions. A variation of closed cut valley.

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. 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. The shingles in the valley may lose their granules and thus their coloration and protective capability faster than the rest of the roof. Follow this step by nailing drip edge along rakes sides of roof on top of the underlayment.

Layout fabricate overlap and secure asphalt shingles per manufacturer instructions. Cover the rest of the roof with no. In addition it is important to avoid nailing the shingles through the valley metal. 15 asphalt saturated felt underlayment some codes may require no.

However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. Experience the total owens corning roofing system and high quality roofing shingles. Flashing requirements for asphalt shingle roofs flashings for asphalt shingles should be corrosion resistant metal with a minimum thickness of 0 019 inch. 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. Take care not to place any fasteners in the exposed center area of the metal flashing. Install drip edge eave trim and valley flashing. 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. Ultimately laying any shingle in a valley can restrict proper water and debris flow unlike the metal flashing used in an open valley. Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you.