Glass Tile / January 9, 2019 / Fleurette Theriault
The reason so much more grout is removed than when grouting conventional tile is because light refracts better through the glass tile when the sides of the tiles are exposed to the light. Work 3x3 spaces for about ½ hour or until the grout begins to dry then sponge off the grout. Bring several buckets of clean water and a sponge to the work area before you begin. Soak up some water into the sponge and gently wipe away the excess grout that is adhered to the tile. Smooth the grout lines with the sponge using one continuous swipe. Flip the sponge over and swipe more grout from the tiles until it becomes full of grout. Rinse the sponge in a clean bucket of water and repeat.
In situations where glass tile is exposed to extreme temperature differences an elasticizing polymer is added to the mix allowing the grout to stretch and flex preventing breaks from occurring in the delicate glass tiles. Using a grout float scoop a manageable amount of grout onto the float. Start at the farthest or highest spot away from you and spread the grout in between the tiles diagonally across the pattern. Dont worry about getting grout all over the tiles. The grout must be firmly pressed into the grout lines with the grout float covering all spaces and voids. Once a 3x3 section of grout has been applied to the tile use the small rubber edge of the grout float to remove about a third of the grout from between the tiles.
In addition there are two other eminent glass surface treatments for these tiles: slumping and etching. Smalti tile is type of tile which is an opaque glass. It has been in use from ancient times. "Smalti" is an Italian word and refers to a glass paste. Smalti is made by mixing molten glass with metal oxides for color. Translucent Smalti is a popular variant of smalti glass tile. It looks like stained glass with uniform colors. Byzantine Glass is another smalti variant made from thinner slabs of glass. Metallic Smalti is a swirl of a copper-bearing mineral added into the molten glass before it is pressed. Gold Smalti are made by applying a gold leaf and a thin layer of blown glass. Fused Tile is manufactured using the fusion method. In this type a flat glass is cut into tiles shapes and then fired in a furnace. The clear glass will show the tile until treated with a color.