Instructions / Assembly

STEP 3. Mix the mortar according to package directions.
It is best to prepare the mortar to the consistency of a
spreadable mud. Using a grout bag or trowel, push the mortar
mix filling the spaces around the outside perimeter of the
glass block window. Repeat this process around the the
inside of the window until the entire space between the
wall and the window is completely filled. Once the mortar
begins to set, remove the shims and fill in these spaces
with the leftover mortar mix.
TIP: A good way to check to see if the mortar is set and that
the shims are ready to be pulled is to press your thumb into the
mortar joint. If it is difficult to leave an imprint, then the shims
are ready to be removed.
STEP 3. Use silicone to completely fill in the open gaps
around the outside perimeter of the glass block window. Repeat
this process on the inside until the space between the wall and
the window is completely filled. Wait 24 hours to allow the
silicone to completely set and support your window, then
remove the shims and fill the remaining gaps with silicone.
IMPORTANT: Do not leave any empty spaces or voids for
water to leak into or around your window.
Glass Block Window
New Construction Installation Instructions
New/Replacement
Construction application
Wood Frame Openings
Masonry or Brick Opening
MORTAR
MIX
SEALANT
(not included)
HACKSAW SAFETY GLASSES
SHIMS
CROWBAR
MORTAR MIX
HAMMER
HELPER
TROWEL
REQUIRED TOOLS
BEFORE REMOVING THE EXISTING WINDOW
Double check that the new window you are putting in will
properly fit into the opening and is the correct size. To ensure
a good fit, measure the window opening as if the existing
frame had been already removed. The rough opening mea
-
surement should be 1/2” in. to 1” in. wider than the actual
size of your replacement glass block window & frame. The
gap between the new window and the rough opening will be
filled with mortar (not included).
NOTE: ALWAYS WEAR SAFETY GOGGLES.
DO NOT carry pre-assembled windows flat.
Always carry vertically.