It's difficult to pull back laminate floor to look underneath though??just look upstairs under any carpet. see if there are floorboards. ( for anyone who doesn't know, these are parallell strips of wood, about 6" wide, usually keyed together with tongues and grooves. as long as a wet-pants hasn't been at them, you should not ne able to see through to the ceiling below and they shouldnot bounce up and down when you walk on them..).