Flashing On Asphalt Shingle Roof I

Install your underlayment completely and your shingles up to where the wall begins so that the first piece of flashing or the corner flashing will rest on a shingle.

Flashing on asphalt shingle roof i.

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Leave the old valley flashing in place and install new over it. Install roofing paper membrane. How to prevent damage.

The extra kick at the bottom of the face directs run off away from the structure. Layout fabricate overlap and secure asphalt shingles per manufacturer instructions. If you re building a home or replacing the roof choose shingles rated for wind resistance. Install drip edge eave trim and valley flashing.

Use sticky back ice and water shield as underlayment where ice dams or leaf and twig dams are likely to build up and at. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. Every asphalt roofing manufacturer s installation instructions that i have ever seen specify step flashing as the preferred way to flash the roof to wall juncture. And in section 905 which covers the installation of all roof coverings of the 2015 irc the first sentence requires compliance with the code and the manufacturer s.

Ultimately it ll be up to what your contractor finds during your roof inspection that determines if a nail over is an option for you. To make corner flashing take your tin snips and cut a 45 degree line from an outside corner to the center fold. Nail metal flashing called drip edge along the bottom edge of the roof deck near the gutters. This drip edge flashing provides protection from water damage along the eaves and rake of a roof.

Strong gusts may also loosen the metal flashing on the shingles or snap tree limbs causing them to collapse and damage the roofing material. The roof also must have only a few penetrations a small amount of flashing and no walls that have to butt up against your shingles.