Gap around bathroom exhaust fan. What should I fill that gap withto stop air leaks. Use more of whatever kind of insulation is in your attic now. You insulate the air duct connected to the fan which you will. Depending on the size of the gap surrounding the fan youll have to use different approaches to fill it.
1 Stand a stepladder at the area of the fan. I have a small bathroom 85 ft Long 55 ft Wide and 125 ft Tall and Im having a problem in the winter with water dripping down from the bathroom exhaust fan mostly in the winter when its cold. Use more of whatever kind of insulation is in your attic now. I just installed a new bathroom exhaust fan in my bathroom. Depending on the size of the gap surrounding the fan youll have to use different approaches to fill it. That means warm air in the winter and cold air in the summer is leaving even if you finished your shower hours ago. Use expanding foam to seal the crack between the fan housing and the top of the bathroom ceiling.
Caulk or spray foam can be used to seal the box to the ceiling drywall and to seal around the exhaust pipe. It could be as simple as a bead of caulk or could involve flat taping and finishing with joint compound. Make sure the rigid foam notched around the exhaust pipe is sealed perfectly. If you really want to you could run a bead of silicone caulk around the. The box and the duct can be covered with attic insulation. In most cases the gaps are patched in a matter of minutes. And if I seal that gap will the fan work better.