Installation Guide

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4. Mortar Preparation
The following gives an idea of the number of blocks
that can be installed per 50 pound bag of mortar.
A. Mix mortar according to the instructions on the
premix mortar bag. When mixed to the proper
consistency, mortar should stick to the edge of the
glass block when turned on edge. Be sure to read
and understand all precautions outlined by the
mortar manufacturer. Freshly mixed mortar may
cause skin irritation.
Note: Slowly add water to mortar mix. DO NOT mix
more mortar than you can install in one hour.
Note: Avoid direct contact when possible and wash exposed
skin areas promptly with water. If any gets into eyes, rinse
immediately with water and seek prompt medical attention.
White Premixed Glass Block Mortar
Block Sizes
(Nominal) 4" x 8" 6" x 6" 6" x 8" 8" x 8" 12" x 12"
No.of 4-in Series
(4"thick)
Based on 1/4" mortar joints
34 34 30 26 18
No.of 3-in Series
(3"thick)
42 42 36 32 N/A
Number of blocks per 50 lb. bag of mortar