How to Install a Low Glass Block Wall in Place of Shower Doors

Decide how many rows of blocks you want to build. For instance, if you want the wall to be 16 inches tall, you'll need to build four rows of block if you're using 4- inch blocks.

Figure how many blocks you'll need by measuring the length of the wall -- to determine many blocks you'll use in each row -- then multiplying the number of blocks by the number of rows you plan to build. Add 1/4 to 1/2 inch between each block, on both the horizontal and vertical measurements, to allow room for the mortar.

Prepare the panel angles. You'll need two panel angles for every other row of blocks you lay. Prepare them ahead of time so you can install them quickly before the mortar starts to set. Measure 3 inches down the panel angle and make a 90-degree bend.

Mix the mortar. Mix as much as you can reasonably use in one hour so it doesn't get stiff. Once it starts to stiffen up you'll have to throw it out. Follow the manufacturer's directions for mixing the mortar. Generally, the mortar should be thin enough to spread but thick enough to stay where you put it.

Build the first row of glass blocks. Spread a layer of mortar across the shower sill. Place a spacer against the existing shower wall and place the first glass block against it. Take another spacer and place it against the first block. Spread mortar along one side of the next glass block and place it against the first one. Scrape away any excess mortar. Continue this process until you reach the end of the row, finishing with a spacer.

Test the wall with a level to ensure that it's even before moving to the next row. Check the levelness of the wall after you complete each row.

Move to the second row. Insert spacers on the top of the existing row to create a 1/4-inch gap between rows. Spread a layer of mortar across the top of the first row. Install the second row in the same way as the first.

Attach the panel anchors. Use drywall screws to attach the 3-inch side of the anchor to the wall. Leave the long end flush against the top of the glass block. The mortar and the next row of glass block will hold it in place. Repeat the same process on the other end of the wall.

Continue the process until your wall is the desired height. Install panel anchors every other row to ensure the wall stays in place.

Finish the wall. Remove the spacers before the mortar completely hardens. Clean off the blocks with a damp cloth to remove excess mortar. Smooth the mortar joints before the mortar is completely dry. Finally, apply a clear sealer to the mortar joints to prevent mold and mildew from growing in the joints.