Installation Guide
8
5. Install The First Row
A. Place two glass blocks in the sill channel, sliding one 
block into the right jamb and one block into 
  the left jamb. Make sure the blocks are seated in 
  the channels.
Note: No mortar is applied to the edges 
of the blocks that meet the channel. 
DO NOT apply mortar to the 
channels.
5A
B. Install the next block:
• Apply 3/8" to 1/2" of mortar to the edge of the 
  next block.
• Place the block in the channel with the mortar 
facing a previously installed block.
• As you install the block, insert a “REGULAR” spacer 
with the cross arm down where the two blocks 
meet.
• Push the block rmly in place, forming a 1/4" 
  mortar joint. Make sure the joint is completely 
  lled with mortar.
5B










