Abstract: Tiles are mounted on a substrate by an adhesive strip of material having a backing member mounted thereon. The strip is first adhered to the substrate and subsequently, a facing tile member is affixed to the backing member. The means for joining the tile and backing member comprise an aperture in the middle of the backing member to receive a prong which projects from the back face of the decorative tile. A raised geometric configuration on the front of the backing member engages the mirror image geometric shape on the back face of the tile to prevent rotational misalignment.