What can be replaced in a sandwich system?

In a sandwich system, when the surface of the top tile becomes worn, usually only that tile needs replacing. The tiles beneath it generally last much longer and need replacing much later than the top tile.

The Wearing layer is subject to abrasion as people walk, exercise and play on it. The tiles beneath are not exposed to direct sunlight or surface abrasion, so in most cases they can remain in place and be reused.

Reusing the lower tiles and replacing only the top tile costs considerably less than replacing the entire floor covering. A new top tile in a different colour also allows the surface colour to be changed without relaying the entire floor.