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 | (11) | EP 1 726 737 A3 | 
| (12) | EUROPEAN PATENT APPLICATION | 
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| (54) | Apparatus for releasable fixation of tiles to a tile support board | 
| (57) A tile (401) having a front face (202) for displaying and an underside (203) for
                     securing to a tile support surface, the underside having a closed path seal wall (204)
                     extending backwards. The seal wall is configured to provide a seal between the tile
                     and a tile support surface to prevent substance ingress interior of the closed path
                     of the seal wall. A tile having a seal wall also configured to provide a seal between
                     the tile and a second like tile. A tile having an underside that presents tile coupling
                     means configured to communicate with tile support coupling means to provide a first
                     releasable coupling arrangement. A tile support board (404) having a rear face for
                     securing to a support surface and a front face providing a tile support surface and
                     presenting tile support coupling means, such that the tile may be releasably coupled
                     to the tile support board. |