Laminate floor in my basement

packat · 2012-01-17T05:29:35+00:00

I bought laminate floor from Costco. The kind that has thin insulatedpadding underneath. My contractor recommended to put plastic sheetover the concrete and lay the laminate floor over the sheet directly.He said the floor will easily fell apart if we use the underlaymentthe guy from home depot recommended (the soft grey material about 1/4"thick.) I agreed and he just finished laying the floor today. Itturns out the floor creaks all over! Is this normal? When I steppedon a few spots, I can actually feel a gap between the floor and theconcrete.I would appreciate it if some one here could recommend how to correctthis problem? Would it help if we use the underlayment (which meanwe will have to re-do the floor...).Thank you in advance.pax