My floor is concrete with sealer and gloss painted. I covered the entire walking area with interlocking anti-fatigue mats that are about 12" (305mm) square and about 3/4" (20mm) thick. These mats have a matrix of 1" (25.4mm) holes open to the floor. There is no drain in the floor for spills, but when the first spill occurred - a slow leak when a gate valve inadvertently left partially open put pressure on a flimsy hose joint for the sink sprayer - most of the water was contained within the holes in the mats. Fortunately, I was at home at the time and was able to mop up before damage was done. The hose joint was then made much more substantial, and a dedicated mop/bucket have been placed in the darkroom. Incidentally, it's a good idea to have all cabinets etc high enough off the floor to allow mopping under them.
Last edited by silveror0; 06-30-2012 at 01:37 PM. Click to view previous post history.