Can rubber tiles be laid loose in layers?
Where rubber tiles are installed in more than one layer, the layers should not be bonded to one another but loose-laid.
PU-bound rubber granules expand and contract with changes in temperature and moisture, swelling in warm conditions and shrinking in the cold. With loose-laid layers, each layer can move independently of the others.
The interlocking profile of the tiles in the top layer, together with the weight of the whole construction, helps hold it in place. If maintenance or repair work is needed later, the layers can be lifted one at a time, so that each can be checked and replaced where necessary.