Not true. Know two trailers with parquet floor glue directly and no adverse efforts. Pergo does float. It is glued to each other and not down to a surface. It uses an underlayment, again loose laying. Roy Lashway '78 Argosy,'56 Bubble WBCCI 1610 VAC rlashway@zianet.com web site: www.zianet.com/rlashway (polishing report included)