An attached garage is the source of a lot of indoor air pollutants for a great many homes. That's because we store gasoline, pesticides, paints, and other toxic materials there, and we exhaust the fumes of automobiles there as well. …
When I go into homes being built before the drywall goes up, one thing I always look for is how well they did with the ceiling joists in the attached garage. I've written about it numerous times here in this…
The I-joists in the photo above run across the top of the wall between the dining room and the garage. In the old days, before anyone worried at all about air moving through those joist cavities, the builder didn't do…