Hi all - Our basement has "floating" laminate flooring that the previous owners installed, as well as a small bit of carpet in one hallway. We recently discovered that the drain in our basement's exterior entry stairwell had clogged up and water was pretty much gushing under the door and... under the floor! We only found this out by stepping on the carpet--that is halfway across the room from the door--and finding it to be sopping wet.

We've temporarily unclogged the drain (though plan to call in a professional to properly unclog it totally) and have been running a fan and a dehumidifier in the basement non-stop. The carpet has dried up, and the water is no longer coming under the door... but what to do now?

Obviously the carpet has to go. I am not sad about this as it is hideous and filthy, there is not much of it, and there is actually visible mold growing on part of it near a bathroom (separate issue). Once we get the carpet up, we'll decide what to do about that part of the floor... BUT, what to do about the floating floor that covers the majority of the floor? It's been dried out for weeks now, there doesn't appear to be any warping or visible mold growth. Should we tear it up? Spray some mold killer underneath?

If we tear it up, it will be quite a cost to replace it--we're looking at options that inhibit any future mold growth and/or are good options for water-prone areas, e.g. carpet tiles, finished concrete, etc.)--but, we don't want to leave it down if it will pose some sort of trouble or hazard later. Can anyone give us some insight?

Additionally... it appears that the water touched a small portion of one of the drywall interior walls, and it has soaked up about 2 feet from the bottom in about a 3-4 feet wide area. A waterproofing professional used a "moisture meter" and determined this. It seems to be the only place this happened. Do we truly need to tear up that part of the wall, or can we get away with leaving it?

Any and all input is very, very welcome. Thanks!