Imperial sizing is ¼” smaller than the nominal size listed. Metric size block are actually measured in millimeters and are usually smaller than the Imperial size blocks.
Actual size refers to the block’s measurement alone, while nominal size includes a ¼” mortar joint in the block’s dimensions.
Not all glass blocks are load-bearing. A lintel or header is required above the glass block to support the wall material.
In-stock orders typically ship within 1-2 business days from the time the order is placed.
At Glass Block Warehouse, there is no minimum order requirement. Order exactly what you need.
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