Venting an exhaust fan is easy if you have an accessible attic and an asphalt-shingled roof.

Step 1: From inside the attic, determine where the roof vent is to be installed. Drill a hole through the roof’s plywood underlayment and poke a pencil or stick through the roof to raise the shingles a bit.

Step 2: From the rooftop, locate the pushed-up shingles and determine the placement of the roof vent.

Step 3: Slide the roof vent flange beneath the top shingle. Mark the edges on the flange on the roof.

Step 4: Leaving enough shingle material intact to cover the top and sides of the flange, cut away excess shingle material below the flange to allow it to sit flush on the roof.

Step 5: Using the drilled hole as a pilot point, cut a 5-inch hole through the roof. A reciprocating saw or jig saw works best for most underlayment materials.

Step 6: Insert the roof flange beneath the shingles, with the duct outlet centered in the roof hole. Trim the shingles more, if necessary, to assure a snug fit.

Step 7: Coat the bottom of the roof flange with roof cement and carefully slide it into place.

Step 8: Nail the flange to the roof beneath the shingles along the top and sides of the flange. Nail the bottom of the flange to the roof through the shingles.

Step 9: Seal the shingles to the top and sides of the flange with roof cement. Seal the nail holes with roof cement as well.

Step 10: Secure the vent hose to the underside of the roof vent with an adjustable clamp. Wrap the connection with duct tape.

If you haven’t done so already, attach the other end of the vent hose to the exhaust fan. Pack up your tools and tidy up your mess. Now, turn on the exhaust fan and take a deep breath of properly vented fresh air.