comparisons · 3 min read
Allan Block vs Keystone
Two of the most common segmental block families in California — the practical differences.
The practical differences
- Both are engineered, both stack dry.
- Allan Block uses a hollow-core design that ties into geogrid layers cleanly.
- Keystone uses fiberglass pins between courses for alignment.
- Availability varies by yard — pick from what your local supplier stocks.
Related guides
Stay in the loop
Get new calculators and estimating updates.
Stay updated as Yardexa launches new calculators and estimating tools. One short email per month.
These results are estimates only. Confirm final quantities, compaction, waste, and delivery requirements with Yardexa before ordering materials.