Floating floor is floor that does not require be glued or nailed to the subfloor.

Engineered wood floor normally has a real hardwood top layer that gives amazing look of real timber. The undelaying layers are made of multiple plywood, the graining of each layer runs in the opposite direction, thus acting as a check and balance system, keeping the wood from expanding or shrinking too far in one direction which makes engineered floor more strong and stable.