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.
Bathroom fan insulation attic.
The first step is to head to the attic.
While insulating you can make some mistakes.
If you see that your duct isn t insulated at all pick up duct insulation at the home center.
Insulate the bathroom exhaust vent fan ducts.
Insulate your attic access door hatch with weatherstripping and foamboard to r10.
Bathroom vent fan ductwork insulation.
To avoid mistakes not running it at all consider installing switches with built in timers.
If bath fan ducting isn t properly insulated the moist air from your house will condense inside the duct.
Bathroom exhaust fans perform an important function by removing excess moisture from your home.
Options for venting a bathroom exhaust fan include best to worst.
Seal off the chimney chase with sheet metal and or non combustible caulk.
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.
You may find that the insulation simply needs to be refastened.
The building code requires a bathroom exhaust fan to vent outside the building so installation of a new bathroom fan necessarily involves installation of ductwork.