the costco tiles are race-deck tiles. they do snap together and they are about 1 inch thick. they work great. almost every professional race team have them and bring them as portable working surfaces to the track should they not have a garage to use.

but if you drop a small screw or liquids, they do pass on to the floor underneath.

like juan, i have a 3 car garage and am looking at CVT as the cheaper solution.. but these need to be glued down...