Installation Guide

 Fill with the Perimeter Around the Window
Mix the mortar according to the instructions on the bag. Apply the mortar around the
perimeter using a grout bag or a margin trowel. Make sure the joints are packed
completely full. Do not leave voids in the mortar.
When the mortar begins to set, remove the shims, and fill the holes with mortar. Trim
out the exterior and interior with moldings to create inside and outside stops
Note: Glass Block Mortar is recommended. However, a Type S or Type N premix
mortar will work when mixed to a consistency where it will hold its’ shape when
squeezed in your hand
If you have used Option B, “Line the wood frame opening with a cement board”,
and wish to finish the sill, jambs and header with ceramic tile:
When the mortar begins to set, remove the shims, fill the holes with additional mortar
and slightly strike back the interior mortar joint around the perimeter.
Finish the exposed cement board on the sill, jambs and header with ceramic tile. When
you grout the joints on the ceramic tile, you may float the same grout over the mortar
joints around the perimeter of the window. Seal the grout joints with a grout sealer.
 Finish the Exterior
Finally finish the outside of the glass block window
to complete your project.
- These are general instructions. -
- Due to variations in window construction your installation may differ. -