As part of a remodel we are re-covering the walls in our garage, which sit on a concrete cinderblock foundation/footing of sorts. The problem is that mice seem to be tunnelling through from beneath/outside somehow:
I had already vacuumed most of it up and also down into that hole by the pipe before I took the picture, but the block was full and overflowing with a whole pile of dirt spilled out onto the floor behind the freezers along that wall!
So it seems these walls might be a little bit too unfinished in their current state? I live and let live but I'd like to encourage the wildlife to stay outside these walls as much as practical.
I thought about just getting some cans of Great Stuff, but it's two 24 foot walls and seems like I could end up needing a lot of cans. We will be having some sprayfoam insulation done elsewhere, so perhaps I could get an estimate from them to do it in bulk if a foam fill is even a good idea here.
Otherwise should we just fill these in with concrete? And if so, should we do it completely (like try to completely fill all the rows of bricks from bottom to top) with concrete and even rebar while we're at it? Or maybe just pour sand or even just stuff some cardboard or batten down in each hole and sort of just mort in some cement/concrete to sort of cap off just the top few inches of the top row holes?
We've also considered just simply covering it with a wooden sill of sorts (which we might do regardless) but I suspect the mice could still squeeze through along that. Perhaps there's some sort of flexible foam/rubber sealing that would work as sort of a "gasket" underneath and not break down or get chewed through the years?
Basically just wondering if there's a bog-standard way to handle this we should do, or at least what the most practical option is here.
