Permeable Industrial Foundation (37.6sq.ft)

Engineered for Strength. Built for Industry. 15+ years of product testing has brought us this foundation.

The CORE Gravel™ 65-40 is our most robust stabilizing grid yet - designed specifically for industrial-grade applications where performance is non-negotiable. With a 65mm cell diameter and 40mm depth, this grid offers unmatched strength and stability under heavy loads, while maintaining the flexibility needed for high-traffic areas and frequent turning movements.

Whether you’re building a yard for transport trucks, machinery access routes, or high-use service lanes, the 65-40 delivers reliable performance where other surfaces fail. Its cell structure ensures exceptional drainage, preventing puddling, erosion, and surface degradation - even in the toughest weather conditions.

Why Choose the 65-40:

• Ideal for: High-traffic areas, heavy machinery, or farm equipment with lots of twisting and turning

• Heavy-Duty Strength: Rated for 350 t/m² - built to withstand industrial loads and high-pressure use

• Flexible Design: Perfect for areas with constant tire movement and turning - the foundation bends instead of breaking under immense pressure

• Exceptional Drainage: Permeable system eliminates runoff and improves surface longevity

• Low Maintenance: No more ruts, potholes, or constant refilling of gravel

Integrated Heat-Welded Geotextile - Built-In Protection from the Ground Up

The CORE Gravel™ 65-40 foundation features a durable, heat-welded geotextile fused directly to the underside of each grid. This heavy-duty layer is essential in industrial applications, where long-term performance and stability are critical.

Why It Matters in Industrial Settings:

• Prevents Gravel Undermining: In open cell systems without backing, loose gravel can work its way underneath the grid due to constant vehicle pressure and turning tires—causing panels to heave or lift over time. Our heat-welded geotextile eliminates this issue by acting as a secure barrier.

• Locks Fill Material in Place: Maintains a flat, even surface under heavy traffic, reducing rutting and washouts.

• Controls Weeds and Fine Migration: Prevents weed growth and keeps fines from washing into sublayers, preserving the integrity of your surface.

• Enhances Drainage & Filtration: By preventing your clean infill from mixing with your dirty subbase, your foundation stays clean and permeable overtime. Any system that does not have a bottom clogs nearly immedietely.

What's in the box?

• 12 sheets of 65-40
• Sheet size 14.5" x 30.5" (37.6sq.ft)
• Tapered H clips for connecting sheets
• Instructions 

This built-in backing isn’t just a feature - it’s the foundation of the system’s reliability. By protecting from below, it ensures your surface performs above expectations.

Project exceeding 10 boxes? Please contact us for palletized shipping rates.