Glass Tile Installation Tips

Glass tile is very ppular but many installation problems can be easily avoided Do you know the best practices for installing glass tile? What mortars are best? How do I avoid visible mortar voids? And what should I know about glass tile’s thermal expansion/contraction? Read our critical tips below and watch the video above for demonstrations.

When setting glass, it’s important to not cut corners. Thin-set mortar specifically designed for glass, like CUSTOM Glass Tile Premium Thin-set Mortar, are formulated specifically for these applications and won’t sag on vertical applications or shrink. The special formulation of Glass Tile Mortar is exceptionally white, even whiter than other white thin set mortars. This bright white color enhances the appearance of transparent glass tiles.

Take special care not to leave voids that can show through glass that does not have a backing. You can prevent this show through by knocking down trowel ridges with the flat side of the trowel and back-buttering each tile, pressing the two mortared surfaces together with a typical back and forth motion.

Movement joints must be placed at perimeters and changes of plane using a silicone caulk. This is critical with glass tile. Glass naturally thermally expands and contracts, which can lead to cracks in the tile or grout if not caulked properly.  

Lastly, always do a test with your glass tile, mortar and grout, and read all recommendations from the tile manufacturer before you begin. This will ensure that the installation will look great when its complete and for years to come.  If you have any questions, or are setting glass tile larger than 6" x 6" (15 x 15 cm), contact Custom's® Technical Services for recommendations at 800-282-8786.


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