Installing Bathroom Fan Without Attic Access

The best way to proceed with a bathroom fan installation with no attic is to run the venting duct between the ceiling joists and through a nearby exterior wall.

Installing bathroom fan without attic access. The optimal location for a bathroom fan is between the toilet and the shower. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. Avoid venting through a soffit vent or ridge vent.

Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. I m thinking of cut hole in bathroom drill roof marker in bathroom roof run ducting to marker install roof vent which i can do since i left the ducting so close to the marker electrical wire up attach ducting to fan base secure fan to joist using screws through body of fan sarah szabo dec 29 18 at 1 51. For instance if your home has an attic you can get to the fan from above.

If you have access to the attic the fan can vent either through a gable wall or roof. Determine where the ceiling joists are and do not cut into the joists for any reason. Now installing a bathroom fan in a home with an attic will be a little different than installing a fan in a home without an attic.

How to install a bathroom fan without attic access largely depends on the type of extractor you use.