Step 1: Size the Flashing

Flashing will need to be fabricated to seal the hole in the roof. Measurements are taken of the area to be patched (Image 1).

Use tin snips to cut the flashing to size. Cut two pieces to fit together, if needed, in order to create counter flashing (Image 2).

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    Image 1

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    Image 2

Step 2: Secure the Flashing

Slide the flashing underneath the shingles and position it flush against the roof.

Once the flashing is in position, use a caulk gun to hold it in place (Image 1).

Also run a bead of caulk in the back where the flashing meets the roof and underneath the shingles (Image 2).

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    Image 1

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    Image 2

Step 3: Screen the Gable Vent

Measure the area to be covered with mesh wire. Use cutting pliers and gloves, cut the mesh wire to size; use heavy-duty 1/4" galvanized hardwire mesh for optimum results.

Nail the mesh in place, be careful not to knock the attic gable askew