Installing Exhaust Fan In Bathroom Through Roof

Cut a piece of drywall to make the ceiling hole the right size for your fan.

Installing exhaust fan in bathroom through roof. Attach the bathroom fan to the joist. Wrap the joints with duct tape. If the hole is too big you ll need to patch the ceiling. Access the attic and bring your light cordless drill screws and bathroom fan housing.

Leave the drill bit sticking through the roof so you can find the hole. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. The patched areas can be repaired with spackling later. Place the fan in the cut out hole so that the bottom edge of the fan is flush with the bottom of the ceiling drywall.

Attach the drywall filler to a larger piece of wood set it in the hole and drive screws through the ceiling into the wood. Start in the attic and drill a hole through the roof in the desired vent location. Slide clamps over the flexible duct at both the roof cap and the fan housing then slip the clamps over the tailpieces. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.