How To Seal Attic Fan

Seal the exhaust duct to the fan.

How to seal attic fan.

And just as you can feel the air from a leaky balloon you ll be able to confirm leaks in the attic by feeling the draft with your hand. If you have a finished attic seal behind the kneewalls. Four crucial attic air seals to save energy year after year. One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home.

Finished rooms built into attics often have open cavities in the floor framing under the sidewalls or kneewalls. Seal holes in the fan housing with caulk sealing putty or metal tape. Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces. You are not trying to shove foam down the wall but rather make an air tight cap on top.

Take a look at 4 things you should do as. Install the fan then seal around the fan with caulk or canned spray foam. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor. Tape cardboard around the fan to cover large gaps.

Once they are in place you can then place the batts or blankets or blow insulation right out to the very edge of the attic floor. When you turn the fan on high the house will be pressurized like an inflated balloon. Find the lighting electrical box for each room and cover it with a dose of spray foam. Apply a bead of caulk or adhesive around the opening.

Turn off the electricity to attic fan by unplugging or by disconnecting the hard wire from the junction box. Seal the foil to the frame with the caulk or adhesive and staple or nail it in place if needed. Scope using a saw cleanly cut all a hole in the ceiling drywall no more than 1 inch larger in diameter than the fan box. Stick the spray foam nozzle in the hole with it and give it a quick squirt.