Install Bathroom Exhaust Fan Vent Roof

Cut the exterior vent location depending on where you intend to exhaust to the exterior access either the side wall or the roof of the house.

Install bathroom exhaust fan vent roof. Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. Options for venting a bathroom exhaust fan include best to worst. Also bring your reciprocating saw cordless drill pencil and silicone caulk. When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form.

Through the roof or an exterior gable wall. Install the roof vent install the roof vent by sliding the top flange under the shingles above it and resting the bottom flange on the shingles below. Nail the lower corners with roofing nails and tar the heads. Typically the bathroom vent fan motor is powered by the bathroom ceiling light fixture circuit.

Some installers particularly in hotels or rental units hard wire the bath exhaust vent fan to force it on when the bathroom ceiling light is on thus assuring that the vent fan is in fact used. Slide the vent under the shingles so they cover the top half of the vent flange. From the roof find the nail and use the utility knife to cut roof shingles from around the nail. Apply roofing adhesive on the underside of the flanges to seal.

Center the nail between two rafters. This involves running ductwork from the fan usually though an attic and out through the roof. Then drill a hole on the roof top. The lower half of the flange sits on top of the shingles.

In this video this old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Attach the drywall filler to a larger piece of wood set it in the hole and drive screws through the ceiling into the wood. Table of contents hide. Cut a piece of drywall to make the ceiling hole the right size for your fan.

The patched areas can be repaired with spackling later. Apply a bead of asphalt roof cement on the bottom of the vent. If the hole is too big you ll need to patch the ceiling. To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. Secure the vent flanges with roofing nails before installing the shingles. It is because of this that many builders tend to advise against this method.