How to install glass block windows?

Installing a glass block window requires a blend of masonry and traditional glazing techniques to build a secure, heavy, and weatherproof structural assembly. First, the existing window frame must be completely removed, and the rough masonry or wood opening must be cleaned down to a smooth, solid substrate. A thick layer of specialized glass block mortar, which contains specific additives for moisture resistance, is spread evenly along the bottom sill. The first row of glass blocks is pressed firmly into the mortar bed, utilizing specialized plastic T-shaped alignment spacers to maintain perfectly even horizontal and vertical grout lines. As you build upward row by row, metal panel reinforcing anchors must be embedded into the mortar joints every few courses and tied directly into the side wall framing to provide essential lateral wind load support. Once all blocks are set, the joints are packed firmly, struck for a clean profile, and the outer perimeter is sealed with premium silicone.