Attic Insulation Over Bathroom Fan

But some consider it somewhat flimsy and may not support the weight of insulation over any distance.

Attic insulation over bathroom fan. I think you need to go into attic regardless as the fan housing probavly has brackets attached to the attic joists. How well the insulation around the bath fan will work depends on the ducting greatly. The air being removed from your bathroom is warm moist air. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing.

Seal the exhaust duct to the fan box with approved metal tape or mastic. It is very important that you exhaust your bathroom fan outside. Another approach could be an insulated hvac duct approach. If you see that your duct isn t insulated at all pick up duct insulation at the home center.

Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in. Or you rent a blower. Bathroom vent fan ductwork insulation. Insulate the bathroom exhaust vent fan ducts.

The first step is to head to the attic. Never exhaust your bath fan into your attic. Seal holes in the fan housing with caulk sealing putty or metal tape. If bath fan ducting isn t properly insulated the moist air from your house will condense inside the duct.

Install the fan then seal around the fan with caulk or canned spray foam. Seal around the exterior fan duct vent with caulk or a pre made exterior wall gasket. There are several options available for the ducting like flexible aluminum ducting. Mar 8th 2018 2 12 pm.

You may find that the insulation simply needs to be refastened.