How to Install Glass Blocks
Installing glass blocks is a job you can easily do yourself with only basic carpentry experience. Just collect the tools and supplies that you need, and jump right in, following this how-to guide.
First: Construct a frame
Using 1 X 2 lumber, construct a frame for the wall or window to fit inside. Nail it together at the corners, and install it in the wall, or room, where the glass blocks are to go. Make sure that you coat the wood with a water-resistant sealer if it is on the exterior of the home, or in an area like a shower, where it could get wet.
Second: Set the first row
To set a row of glass blocks into the frame, begin by coating the bottom piece of lumber in the frame with a layer of mortar. Then, set the first brick into position in the left bottom corner. Using plastic spacers to keep an exact space between bricks, set a spacer next to the glass block, and put a layer of mortar on the block's right side. Then set the second block. Continue this across the frame until you put the last block in the row at the right side of the frame.
Third: Set each consecutive row
Continue the process by mortaring across the top of the first row of blocks to create a base for the second row. Then, install each glass block, with spacers, just like you did with the previous row. When the frame is complete, allow the mortar to dry for no less than 24 hours.
Fourth: Seal the window or wall
Caulk around the blocks along the frame to seal it completely and insure that the wall or window is water tight. Follow the directions on the caulk packaging to insure the best finish.