I looked at it...all the descriptions say not to install on wood/sleepers below grade, but I hope it can be used with Dri-core subfloors since they have a moisture barrier.

Here is a link that might be useful: Marmoleum floors

Forbo specifically states that their Marmoleum is not to be installed below-grade. The issue is that moisture coming-up through the slab, or coming from an improperly-cured slab will cause the adhesive to fail.

This said, lots of people have installed Marmoleum in a basement. This basically means that their warranty is void, but the warranty mostly covers manufaturer's defects, which you would notice before installation anyway.

If you're going to install in your basement, first do some calcium chloride moisture tests, and compare with Forbo's installation instructions for moisture tolerances. If your basement is prone to leaks and/or floods, don't even bother.

Thanks all, my hopes are still alive. Our basement is dry. How can I perform the calcium chloride test? Hope this isn't oversimplifying, but is there a place I can buy a kit? One thing I don't want to do is install a vapor barrier. We are following the philosophy of buildingscience.com.

Interesting site. Wouldn't dri-core flooring follow the philosophy, though? There's air space underneath the vapor barrier, and you're supposed to install it with vents every ten feet.

Ugh.. I've been reading all the past postings about basement floors.... Can anyone tell me:

What is the BEST option for a basemet floor if there is a risk of moisture under the house and/or flooding? We need to rip ours up and replace (currently Pergo) because we took in a lot of water recently and are getting french drains put in.

I'd love to know what we should do to protect our finished basement, so what needs to go down first, followed by, and then the best flooring. This is causing us so much worry, as we have home offices, bedrooms, play room in the basement.

THANKS!