How to Tile With Glass Blocks

Be sure the space to be tiled measures in 8-inch increments, as the blocks cannot be cut. Measure across and down and multiply the two measurements to get the square inch area.

Load a clear silicone caulk tube into a caulking gun. Release the end by unscrewing the handle slightly and pulling back on it to open up the tube holster. Fit the tube in with the nozzle at the front and the flat part near the handle. Screw the handle in until it stops. Cut the end of the tube off at an angle.

Stretch the measuring tape across the area to be tiled in 8-inch increments. Draw a pencil line across each one after you have made sure it is level. These lines are the guides for the mounting channels.

Test fit a horizontal and vertical row using spacers and channel mounts to verify the dimensions before you begin screwing in the mounts. Trim the channel mounts if necessary with a utility knife.

Hold the channel guides up to the pencil lines and mark the screw holes with the pencil. Use a drill and score the holes for the screws. Hold the guides up again and screw them into the wall.

Begin at the bottom and squeeze a thin silicone bead along the bottom channel guide. Insert one glass block and insert a spacer at the bottom edge. Squeeze a bead of silicone on its vertical side, and push another block onto the opposite side of the spacer. Press them together. Check the level.

Continue to insert spacers and blocks across the bottom. Attach each with a bead of silicone. After the first level is done, work your way across the next level and so on. Keep checking with the level to be sure your work is even.

Run the joint-striking tool along the edges of the tiles to smooth the caulk. Wipe up any silicone that oozes out from the joined edges.