Ideally, unglazed tiles is what you want in a working garage, but there's nothing wrong with using glazed tiles as many on this forum have done so with no issues.
Watch a few videos on youtube to get an idea what's involved in laying tiles. You will need to lay down the thinset on the substrate, and back butter the tiles. This application will eliminate all voids (air pockets) under the tiles when being installed.
Watch a few videos on youtube to get an idea what's involved in laying tiles. You will need to lay down the thinset on the substrate, and back butter the tiles. This application will eliminate all voids (air pockets) under the tiles when being installed.

