Bathroom Exhaust Fan Through Roof

Start in the attic and drill a hole through the roof in the desired vent location.

Bathroom exhaust fan through roof.

Over there mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. To vent a bath fan through the roof you must first prepare a ductwork connecting the roof top to the bathroom. Going through the roof guarantees it will go up in the air and away from your home i would love to see a copy of the building code that suggests venting a bathroom fan through the soffit is recommended. An exhaust vent fan can exhaust out through a gable end side wall or out through a soffit overhang.

Leave the drill bit sticking through the roof so you can find the hole. Table of contents hide. And of course a bathroom with a window doesn t require an exhaust vent. Bathroom exhaust venting does not have to exit up through the roof and in fact that s not necessarily even the best termination.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Most roof caps for bath fan exhausts have a light aluminum backdraft damper which rests on a sealant strip which is basically a foam piece of weatherstripping. This sealant strip is installed to keep cold air from coming in and according to a broan customer service rep it also helps to prevent unbearable metal on metal chatter. Then drill a hole on the roof top.

The alternative to a roof exhaust if you re concerned about not being able to seal the hole in the roof is to exhaust through a gable end.