I poured a new slab in a part of the barn about 7-8 years ago. It was in front of the barn on a slope, and I filled the area with about 10cm of macadam on an old slab and poured on top of that. The old slab was rock hard/reinforced, but the problem was that water often stood on it.
Now the water is gone, and the space is dry. For example, I've had some wooden beams lying on the slab (unheated) for 6 years, and not a trace of mold or anything similar under the beams. BUT that being said, I absolutely don't think it's very dry... in downpours, there are tendencies for a bit of moisture along the barn edge, but it dries up quickly as it is now.
Now I want to make a nice garage slab out of it, and ideally, I would like to have a white/light gray epoxy floor, but I'm worried it's not a good idea since I didn't lay anything tight under it... what do I know... so what are my options?
If the first choice is a white/gray tight epoxy floor, is there any forgiving system that is strong and "tight" but still breathes, for example?
Just sanding the slab and oil/impregnating is, of course, a solution, but I would have preferred white.
