CORE's flagship foundation
CORE Gravel 60-40 HDV
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Discover what's possible
CORE Gravel 60-40, our flagship product since 2010.
12.4sq.ft per unit
These larger units help larger projects go down fast.
40mm (1.6")
The CORE Gravel 60-40's height is 40mm or 1.6"
Lateral Drainage
The openings between cells allow water to move freely beneath the gravel, following the natural slope and maintaining uninterrupted drainage.
Geo-textile backing
Our grids feature a welded, non-woven geotextile that will not rot and remains fully permeable. It helps suppress weeds, separates clean infill from the subbase, and prevents gravel from migrating underneath and dislodging the grids overtime (essential for slopes).
Fire Marshal Approved
Fire marshals across the United States have approved our products for use on steep slopes, confirming they provide a safe, strong, and reliable foundation for fire truck access.
3rd party tested
Third-party testing has certified this product as meeting steep slope slip resistance standards.
Bypass bylaws
In many cases, our products are exempt from bylaws for two key reasons: they are 100% permeable and fully removable. Installing CORE Gravel Foundations does not count toward your allowable impermeable surface area.
300 tons per sq.m
When filled, CORE Gravel 60-40 can take up to 300 tons per square metre.
Designed with purpose
Tested and proven for 16 years in North America
Need help?
Frequently Asked Questions
Yes! This foundation is specifically designed for driveways and commercial parking areas.
We have been successfully installed on fire truck access lanes exceeding 18% slopes.
For projects below 350 sq.ft, you can buy right here online! For orders exceeding 350 sq.ft, please reach out for a custom quote and delivery options.
Before/after
Before
After
60-40 resources
Below are resources to help you learn more, spec the product into projects, and more
Video