Installing a Glass Block Wall

Capping the Edge With Limestone

For the cap, the author rips 4-inch-wide strips of limestone from 12-inch limestone tile, and then rounds over the edges of the strips with an abrasive wheel on an electric grinder. After the thinset coating on the edge of the glass-block wall has fully cured, the author spreads another layer of modified thinset for installing the limestone cap tile.

He then butters the back of each stone tile …

… and presses the tile into the fresh thinset.

Starting with a partial tile at the bottom lets him finish at the top with a full tile, and using plastic wedges helps him to maintain even grout joints between the tiles.

He continues installing the stone strips across the top of the wall to finish wrapping the edges of the glass block wall.