- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 25 Sep 2019
Floating floors in buildings
Floating floors may be constructed from materials such as timber planks or boards, engineered timber, laminate flooring and some types of tiles. These materials can be glued, snapped or otherwise fixed to one another, but are not fixed to the substrate layer beneath (which may be, for example, the structural floor, an underlay, an underfloor heating construction or acoustic or thermal insulation).
A floating floor is not the same as a raised floor (sometimes referred to as an access floor or raised access floor), which is a floor created above a solid floor slab, but with an open void between the two within which building services may be distributed.
Floating floors can be easier, faster and less expensive to install than fixed flooring, and may be easier to remove, for example, if access is needed to the floor structure itself or to a floor void or ceiling where services might be installed. They can be less deep than other types of flooring and cause less damage to the substrate below.
They can generally accommodate some movement between the flooring and the substrate, for example where the humidity of a room changes. This requires that a gap is left around the perimeter of the flooring, between it and the wall or skirting. These gaps may be filled with a flexible filler or concealed beneath an edge trim or skirting.
Floating floors are held in place as a result of their own weight, the boundaries of the room in which they are laid, the fixings between the elements of the floating floor, and friction between the floating floor and the substrate.
However, as they are not fixed down, they can move under loading, for example when walked on, in particular at the edges. This can lead to delamination, or cracking or separation of joints, as can differential movement between the flooring and the substrate. Where there is substantial movement, for example if the flooring becomes wet and expands, floating floors can be prone to buckling or bowing.
 Related articles on Designing Buildings Wiki
Featured articles and news
Our duty to prevent harm and protect each other.
A quality perspective.
If buildings were people, they would be just starting to walk on two legs.
Air filtration and clean air standards.
The Dukes of Normandy and the second world war.
Conserving structures in historic designed landscapes.
Online platform to showcase acoustic solutions.
The drivers of value and how it is measured.
Do you know your Ionic from your Doric?
Construction output has been stronger than anticipated.
But blame is directed at the construction industry.