I am in the process of removing vinyl flooring from a cement slab and need some advice on preparation for the new flooring. The flooring was installed in 1990 and therefore no asbestos. The floor is in a heated room between my kitchen and garage. I am not sure if I need to seal the slab with Drylock before putting down a sub floor or if I need to put down a vapor barrier before putting down a sub floor or if I need to put down a sub floor at all. I am looking to install a laminated product.