Operating Guide
C. Measure the opening
diagonally from corner to
corner in both directions, and
compare the dimensions to
check for squareness. These
dimensions should be equal to
within 1/8".
Note: If there are any problems with
the opening, make adjustments before
proceeding.
Mortar I System
The tools required for the Mortar I glass block
installation system are a margin trowel, mortar pan,
polyfoam brush, sponge, tin snips, screwdriver or power
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"
to 1/2" striking tool
and 2' level.
sure the opening is level
and plumb.
1B
1C
1. Prepare The Rough Opening
A. Make sure the opening
is the correct size. To
determine the correct
size of the rough opening,
add 1/4" to the sum of the
nominal block sizes for
both the height and width.
Example: Panel (using
8" x 8" block) is four block
wide (8 x 4 + 1/4" = 32-1/4")
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+ 1/4" = 40-1/4"). Rough
opening needs to be 32-1/4"
wide and 40-1/4" high.
B. Use a level to make
1A
3