This looks like what happened at our house..But ours was old vinyl
flooring..The floor started turning black in the center, and got bigger..We
had a flooring guy come out and he indicated we had a plumbing leak..We had
an engineering company check and the drain lines under the house were
leaking in the slab...They dug a tunnel under the house, jack hammered out
the old cast iron pipe and replaced it with pvc..But our problem was twice
fold..The leak also caused the soil under the house to swell causing the
house to heave up four inches causing foundation problems..You don't even
want to know what that cost to fix...Gosh I hope yours was something spilled
and leached into that carpet..I can't imagine who would install laminate
flooring over carpet..But have it checked carefully....
John


"Roger" wrote in message
news:UUqtc.4448$eY2.4013@attbi_s02...
You need more time to let it dry. Perhaps several days.
Also, if this area got wet from leakage from below, from a plumbing leak
within the slab, or springs under the house, further diagnostic work needs
to be done before any new, especially expensive, flooring is considered.
Best case, there may have been a surface spill that seeped under the
flooring, causing mildew and mold. Whatever, the pic looks like there is a
major moisture source in that area, that needs to be examined.