A client recently asked me if I had any ideas why his house was so dusty. I stopped by to take a look and figured out the problem right away. The air vent boots in the ceiling weren’t sealed at the drywall, so when the heat or air conditioning turned on, air was being pulled in from the attic along with dust. The dust around the vent cover was a clue this was the case. When I pulled the cover off, sure enough, I could see right into the attic.
This is an easy do-it-yourself project. Here’s what you need to do to caulk your vent boots: