Bathroom Echaust Duct In Attic

Bathroom exhaust fans perform an important function by removing excess moisture from your home.

Bathroom echaust duct in attic.

That condensation drips from the duct work in the attic space and the exhaust fan. It may also violate a shingle warranty. 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. These steps outline how to install a flexible duct with an attic roof vent.

An insulated duct will help prevent condensation when the warm air from the bathroom meets the cold duct in the attic. These ducts should be insulated or replaced with pre fab insulated ductwork or flexduct and a better installation would have shortened that very long duct as much as. Dumping bathroom exhaust into an attic or under roof space invites costly mold contamination frost under the roof in freezing climates moisture damage to roof sheathing possibly even plywood delamination or rot roof failures and shorter roof shingle life. If you re not comfortable working on a ladder call a professional for help.

Our photo above shows a long routing of bath vent fan ducts across an attic floor to an exit at the building soffit or eaves and the condensation of moisture in such vent lines. No you cannot vent your bathroom exhaust fan into the attic.