How to find the right Bricks & Blocks AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Bricks & Blocks
- Face brick durability grade
- For exterior brick exposed to freeze-thaw, use Grade SW under ASTM C216. Grade MW suits only mild or protected exposure. Underrated brick spalls once it absorbs water and freezes.
- Concrete block standard
- Load-bearing concrete masonry units should meet ASTM C90. Decorative or landscape block is not a substitute for structural walls. Garden and retaining-wall blocks are not rated for structural loads.
- Firebrick for heat
- Use refractory firebrick, not common brick, anywhere exposed to direct flame, such as fireboxes, pizza ovens and forges. Common clay brick and concrete block can crack or spall under high heat.
- Nominal vs actual size
- Block sold as 8x8x16 is actually about 3/8 in smaller in each dimension to allow for the mortar joint. Layouts planned on nominal sizes come out wrong without joint allowance.
- Breakage on shipped units
- Order extra units, commonly 5 to 10 percent over the count, and check for chipped faces on arrival. Brick and block ship heavy and chip easily, and color varies between lots.
What to avoid
- Using landscape or garden wall block for load-bearing structures
- Common brick or concrete block in fireboxes or ovens
- Mixing brick from different production lots on one visible wall without blending
Questions
Can I use regular brick in a fire pit?
For the inner ring or anything touching flame, use firebrick with refractory mortar. Regular brick and block can crack or spall under heat.