Floating floors: These are floors installed over an existing subfloor without the use of adhesive or mortar and remain stable due to gravity.
In the last decade of the 20th century, this installation technique was used with laminate flooring, whose tongue-and-groove planks were glued together onto an expanded polyethylene base, which provided some leveling and partially improved its acoustic performance. Later, the click system was incorporated, which milled the tongue and groove joints with specific sections that allowed for tongue-and-groove installation without glue and provided excellent support. Other types of floating installation systems use metal clips under the wooden planks or, on top of a waterproof and insulating membrane (Everlay) laid on the subfloor, the upper part of which is glued to a flexible underlayment, resulting in a glued “floating” floor.