Bathroom Exhaust Fan Vented Into Attic

This will cause mold and could leave your home unlivable.

Bathroom exhaust fan vented into attic.

Through the roof or an exterior gable wall. Most municipalities require extractor and exhaust fans to be vented to the outside of the building with an vent cap. Options for venting a bathroom exhaust fan include best to worst. 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.

Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems. However you can vent a bathroom fan through an attic while it terminates on the roof or gable end. It may also violate a shingle warranty. Excessive moisture will cause condensation on roof members and insulation.

It seems like such an easy solution just leave a bathroom vent hose in an attic. No you cannot vent your bathroom exhaust fan into the attic. Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons. It s never okay to vent directly into the attic even if you re attic is vented.

No you should not vent a bathroom fan directly into an attic. You should never exhaust the bathroom fan directly into the attic.