In a Mortar II System, you have to add _____ to the height and to the width of the glass block when determining a rough opening.
A) ¼"
B) ½"
C) ¾"
D) 1"

Name: In a Mortar II System, you have to add _____ to the height and to the width of the glass block when determining a rough opening. A) ¼" B) ½" C) ¾" D) 1"
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In a Mortar II System, you need to add ¾" to both the height and the width of the glass block to account for the mortar joints when determining a rough opening.

In a Mortar II System, You Have to Add _____