I'm working on installing a sleeper floor over a concrete pad in my garage, which I've converted into a living space. I'm planning to put down a vapor barrier first, and then anchor the joists to the concrete with tap-cons. According to building code, sills and sleepers that are in direct contact with the ground need to be pressure treated, unless they're separated by a moisture barrier. While my joists will sit on top of the moisture barrier, the tap-cons will penetrate it. So, given this situation, should I opt for pressure treated wood?
3 Answers
Just a heads up, not all vapor barriers are the same—some don't act as moisture barriers! If you're worried about moisture, definitely go with treated wood. It’s a safer bet, even if it isn’t directly exposed.
I would skip the pressure treated wood for living spaces. It’s not needed and you might deal with some chemical fumes.
Instead of using tap-cons, consider floating the floor. And like someone mentioned, if there’s any chance of moisture, pressure treated wood is your best friend. Plus, it’s tougher against critters!