If the moisture is comming from the outside, check the slope of the yard. If slope is tords the house, that is your problem, You can dig out from the house a trench that is about 18 inches wide and goes deep enough to be 6 inches below floor line, Fill ie with crushed stone and sand that will improve drainage. Did you do a moisture test before putting down the pergo? Is there a moisture barrier under the pergo?
cholbach, June 2005