When you say "not dry" do you mean still liquid like a puddle or it just looks a darkish colour? Can you remember what was actually underneath those spots on the floor? Do they relate to particularly deep patches?
If he has levelled the floor perfectly in one session then it might be worth waiting a bit longer because if you take it up and try and level it again you will get a seam where the new levelling meets the old. It depends on what flooring you are putting down as to whether this matters (it usually doesn't).
Making the decision to go and clean it up might be the only way you will find out what's underneath and why it's not set. All my previous experiences with levelling it's been dry enough to walk on overnight, even when I've put it down an inch or more thick in places.
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cborg1
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bathroom self leveler cracks
I have a small second floor bathroom floor (5x6 feet) that I want to tile with 8x8 porcelain tile over top of a Nuheat membrane and in floor heating cable. It had a few small dips (3/8's deep in some places) as well as a slight slope towards the door approx. 3/8 inch. The floor is 1/2 inch plywood over the original 1 inch subfloor. I screwed down the plywood every 6 inches so it's down pretty solid. I decided to use some Mapei Self leveler plus to level it out. First I rolled the floor with the suggested Mapei primer. It's not a big area and the slope not very deep so I decided that 1/2 a bag would be enough for the area I needed to fix. Before I started, I went on line and to a number of forums where I read about a number of leveling stories gone bad because the mixture did not level out properly. I initially used exactly half of the suggested amount for a full bag (5 litres) but because it looked like really thick pea soup, and because I was nervous after having read aout some bad experiences, I decided to add a small amount more of water (so 2.5 litres plus approx. 150 - 175ml). It flowed well and I was able to get it well leveled without too much trouble however after the 24 hour waiting period it still did not seem to be totally dry. I called Mapei and they instructed me to use a pointed screw driver to see if it was dry. Some areas were still soft so I was to told get a heater and wait another day or so which I did. A week later, there are still some darker areas than others but it does seem to have hardened however, I have noticed some hairline cracks in leveler and they are making me nervous. I contacted Mapei and I was told to check for hollow spots. One area does sound alittle bit more hollow than the rest but not to bad. They also told me to get a chisel and tap the floor. I was told if it brakes away or crumbles that I will have to rip up everything I poured. I didn't want to just go ahead and do that so I asked a contractor I know and he brushed what I was told by Mapei off telling me not to worry about it and that the membrane will buffer any movement or loosness of the floor leveler but he's not a tiler so I thought I should I should put my dilema to the pros. Does anyone out there have any advice for me?
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