Comb the mortar using an appropriate notched trowel in one direction, using the back of the trowel; flatten any notches of the mortar previous to placing the mosaic glass tile.
Place tiles in mortar; beat in, to ensure proper coverage. Do not adjust tiles set in mortar after 15 minutes. Set your sheets into the thinset layer spread on your substrate, taking care to square the sheets as you go.
Sheets should be placed onto the newly troweled thinset on your surface immediately. DO NOT delay this step, or your thinset will begin to dry, and the tiles will not fully adhere to the surface. The thin-set mortar MUST cover the back of each glass piece pushing up slightly into the joints. Air bubbles not pushed out will be visible through the transparent glass and the bonding capacity of the mortar will be reduced.
You can remove excess thinset from the joints, before grouting later. Beating in with your float or beating block across the joint between adjacent sheets will achieve a level field across the entire area.
Properly beating in, and leveling will also prevent air bubbles from being trapped between the thinset and tile. Align each sheet carefully as it is installed to create uniform grout joints from sheet to sheet.
A joint between adjacent sheets should measure the same distance as the joint between the rows of tile within a single sheet. If the joint between the sheets is wider, you will see a series of individual sheets outline on your surface, instead of a smooth, continuous field of tiles that covers the entire area.
Within minutes of applying each section of your area, examine and straighten any joints that are not aligned. These straightening and aligning steps MUST be done while the thinset is still pliable. Do not wait until all of the sheets are installed to begin straightening the joints or the thin-set will be too dry to allow any realigning.
Repeat these installation steps until all sheets have been installed. If you want to adjust the positioning of one or more glass pieces, use a sharp cutter to cut the clear film around the piece s in order to move as desired.
Adjustments must be done immediately after or during the installation process before the setting material has dried. The best all-around mosaic backer is concrete backer board, such as that used in bathrooms as the sub-floor for tile floors.
Push the tile into the saw blade in a slow and steady motion. As the blade approaches the final few inches of the cut, push the remainder of the tile through the blade with a scrap board to keep your fingers clear of the blade.
Using a bar cutter to cut glass tiles is more efficient than using a scoring wheel and pliers, because the machine can both score and cut the tile. Some bar cutters only score the tile, while others include a pressure foot that snaps the tile along the scored line.
Follow up with a sponge and warm water. The less water you use, the better, as too much water can weaken the grout before it sets. Once the tile looks clean, go back over it with fresh water and a damp sponge to reduce surface film.
Allow tile surfaces to dry for 15 minutes, then buff with a soft cloth until shiny. If you wait longer to clean and buff the tile, the resulting grout haze will become difficult to remove. For stubborn haze, use a grout haze remover or tile cleaner that contains sulfamic or phosphoric acid. NOTE: Sulfamic acid and Phophoric acid are toxic substances, and like any chemicals, should be used ONLY with the proper protective gear, and in a well-ventilated area.
No warranty is implied. Glass Tiles may also be cut with a wet saw. If using a wet saw, be sure to use a diamond blade. A diamond blade specifically used for cutting glass has smaller diamond than those used for ceramic tiles. Never use a ceramic blade to cut glass. Ceramic blades tend to be coarser and will chip the glass. It is very important when cutting glass to use adequate amounts of water to cool the blade and to cut slowly.
When cutting glass on a wet band saw, cut tile face down to prevent the face of the tile from chipping. A light piece of cardboard on the saw's cutting table will protect the surface of the glass from scratches during the cutting process. If necessary, finish edges of the glass with a glass grinder or scythe stone. Glass tiles can be routinely cleaned with any non-abrasive cleaning compound or formula that is recommended for both glass and tile.
Follow manufacturer's instructions when using these products. During back buttering, it is not uncommon for thin-set to push through the mesh, which may partially fill the grout joints and rise above the surface of the tile once the sheet is applied to the wall. For this reason, professional installers often prefer "setting in color", or using the same installation material as both mortar and grout.
Check with the manufacturer of the thin-set you choose in order to verify its suitability for setting in color. If you choose not to set in color, you can remove excess thin-set from the joints as described below:.
Wipe excess grout off, first with a dry cloth, such as cheesecloth or any other lint-free cloth to remove excess grout on the tile surface.
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