I'm trying to mouse-proof a 24'x24' garage on my property and could use some advice. The garage has plywood floors on one side that are in decent shape, though I need to replace a 4'x4' section. The other side has tight plank flooring. I'm considering a couple of options for sealing it off: 1) filling all seams with steel wool, spray foam, or construction adhesive, or 2) completely re-sheathing the existing floor with 5/8" plywood, which seems like it might be overkill and more expensive. I'd also go around the perimeter to fill any holes. What would you do if it were your garage? I'm leaning towards the plywood option but I've read that I should secure it to the floor joists instead of just the subfloor. Is that right?
1 Answer
Mice can squeeze through holes the size of a pencil, so sealing up any gaps is crucial. I've been mouse-free for a year by filling plumbing holes with foam and steel wool, and I finally blocked my dryer vent with spray foam. Just remember, if mice are accustomed to a path, they might chew through spray foam, but they won't without a reason. Using steel wool combined with foam is great because, trust me, their teeth will wear out before they can pull it out. If you seal everything and still find a hole later, you'll know where they're getting in. Also, trapping any that are already inside ensures they won't die in your walls. Good luck!
Thanks for the tips! How did you handle the garage door? It seems like a tricky spot to seal off!