How To Trim Asphalt Shingles At Edge Of Roof

Inspect the roof line of your house.

How to trim asphalt shingles at edge of roof. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Along the rakes install a new j channel drip edge which wraps around the old rake flashing and starter courses. Strip off old shingles. Hold a ruler or yardstick over your shingle 1 2 inch beyond the roof line.

Install flashing on any valleys for waterproofing. Install your starter row of shingles at the bottom of your roof making sure to follow the. Are there any gaps buckled eaves or irregularities in this line. Typically this will happen when you need to trim an edge off several shingles at once such as downsizing all the pieces that will go along the edge of the roof.

Gently lift up the shingles on the edge of the roof and locate the nails holding the existing drip edge onto the roof. Nail the shingles with no tabs such as precut pro start shingles and apply asphalt cement from a caulk gun in many dots along the drip edge under the edge then press the tab less shingles down onto the line of asphalt cement dots with adequate spaces between the dots. How to trim asphalt shingles at the edge of a roof. A continuous bead of asphalt could trap condensation or windblown water under the roofing at some point.

After each shingle line has been laid one shingle will overhang the rake edge. If so you. Cover your roof with felt paper and overlap the ridges at the peak. Position the side of hook knife against the drip edge beneath the shingle with the blade facing upward against the.

Use a flat pry bar and hammer to pry the nails out of the drip edge gently. Install the drip edge. You ll need to use a strong tipped saw blade such as one designed for cutting through old nails otherwise it will wear down extremely fast from cutting through the shingles. Is it straight across.

Install the self stick underlayment. Leave the old valley flashing in place and install new over it.