Attic Insulation Over Bathroom Fan

I just added r19 unfaced insulation to my attic.

Attic insulation over bathroom fan.

There are several options available for the ducting like flexible aluminum ducting. If bath fan ducting isn t properly insulated the moist air from your house will condense inside the duct. 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. The box can be made from rigid foam.

You may find that the insulation simply needs to be refastened. Insulate the bathroom exhaust vent fan ducts. Bathroom exhaust fans perform an important function by removing excess moisture from your home. Another approach could be an insulated hvac duct approach.

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. 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. I want to make sure that is ok. How well the insulation around the bath fan will work depends on the ducting greatly.

I had insulation from 1952 that was less than an inch thick. If you see that your duct isn t insulated at all pick up duct insulation at the home center. The first step is to head to the attic. The exhaust fan housing should be covered with an insulated airtight box.

In un conditioned space such as an attic where otherwise your fan duct will be exposed to cold attic air in winter use insulated solid metal ducting or insulated flex duct. Caulk or spray foam can be used to seal the box to the ceiling drywall and to seal around the exhaust pipe. The seams can be taped with housewrap tape.