Leveling badly patched and uneven garage floor? I just bought a house in PA. I have a 2 car garage. It has a few problems: I don't have pics as I haven't moved in yet, but the garage floor is very uneven. It has cracked or been patched or broken up many time over the years. I am guessing 30-50 years old. It is VERY humid in the garage. Although we are not in a particularly wet area there is a lot of moisture coming up through the concrete. I had a concrete guy come to see about leveling it and based on the age and condition of the building and floor he didn't think it was worth repairing. It is about 500 sq/ft and he quoted $4k to grind it, patch it and level it. Too expensive for a basic detached 2 car garage. I have come up with my own solution and wanted to get thoughts. A couple of years ago I put in a bluestone patio so that is the experience I am drawing from.... First put a 6mil Vapor barrier down to manage the humidity/moisture coming up through the concrete. Around the perimeter build a wood 2x4 or 2x6 frame Next use stone dust across the entire floor as a way to level it. Tamp it down well. Build wood 4x8 frames with interior "joists" using 2x4s throughout the garage. Screw down marine grade 4x8 3/4 or 1" ply wood to create a new floor. Put a garage floor mat down like the G-floor mat over the ply wood. https://www.bltllc.com/products/g-floor-vinyl-flooring/solid-color/ I have a quick lift so I would cut out squares in the ply wood to drop cement tiles down through for the quick lift to sit on and be supported by the stone dust and concrete below.... Hopefully this description makes sense. I think I could do the whole thing for $2,500....maybe not worth the trouble to save $1,500 or maybe the quote was too high. Ideas and thoughts welcome!