How to Install Solar Roof Vents

Place your solar vent in a south-facing position that will not be shaded by trees. In your attic, mark the location of your solar vent, using a pencil. Measure 2 to 3 feet down from the center ridge cap with a measuring tape, and make a center mark between two roof rafters. Drill a hole at this mark through the roof, so that the 1/4-inch drill bit extends above the shingles.

Scribe a circle around the drill bit, using chalk or crayon and a string with a small loop tied at one end as a compass. The opening for the vent will typically be 12 inches to 14 inches in diameter; follow the vent manufacturer's directions.

Cut the shingles along the circular outline, using a sharp utility knife. The vent will be surrounded by a flat metal flashing that will fit under the shingles surrounding the vent opening. Remove the nails or staples holding the shingles with a pry bar so that they can be carefully peeled back, and the flashing can slip underneath. Double-check the required diameter for the vent opening, and that your saw line will not cut through any roof rafters.

Drill a starter hole if necessary, and cut the vent opening in the roof, using a reciprocating saw or saber saw.

Lay a continuous bead of clear silicone sealant around the outline of the vent flashing, using a caulking gun. Set the roof vent over the silicone and press into place. Press the shingles back into place, attach with new roofing nails and a hammer, and caulk around the flashing. Screw the vent flashing to the roof, using the cordless drill, and finish with caulk over the screw heads to prevent leaks.