In article , "Edwin Pawlowski" wrote:

2) Do I need to seal the cracks in the slab before I put down the
flooring? The house is 9-1/2 years old, and settling cracks have
developed in the concrete in just about every room - none over 1/16" wide,
but I'm thinking these cracks could be a path for ground dampness (and
maybe termites?) to get at the flooring.

They don't have to be sealed, but there usually is a barrier.

Yes, I'd be amazed if the manufacturer doesn't require a vapor
barrier when installing over slab as a condition of the warranty.

Hey, it's cheap and easy -- there's no reason to skip on the barrier.

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