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Setting Mosaic Tile

In some ways, setting mosaic tile is just like setting any other tile. But because the individual tiles are small (usually two inches or less), mounted on sheets and often made of glass, mosaic tiles present some unique challenges. So we asked Dean Sorem, our go-to tile expert, to show us his best tips for cutting and setting mosaic tiles.

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Flatten Wavy Walls

Dean says that one of the most important tips for any tile-setting job, including mosaics, is to start with a perfectly flat surface. Before you begin tiling, check the surface with a straightedge. If you find a dip in a wall, flatten it by screeding a layer of setting-type joint compound over it as shown here. For floors or walls in wet areas, use thin-set instead of joint compound. Let the joint compound or thin-set harden and you’re ready to set tile.