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Whether you’re laying a road base, building a retaining wall, or prepping a slope, the success of your project starts with what’s under your feet. Weak subgrade? You’re risking settlement, cracking, and costly failures down the line.
That’s where geogrids and stabilization fabrics add strength and structural stability.
At Stevenson Supply & Tractor Co., we’ve spent four generations supplying Northern California contractors with top-tier geosynthetic solutions. This guide walks you through the basics: what these products are, when to use them, and how to install them right the first time.
Geogrids are high-strength polymer grids (typically made from polypropylene or polyester) used to reinforce soil and spread loads. Their open mesh structure lets aggregate interlock with the grid, increasing bearing capacity and reducing rutting.
Stabilization fabrics (also known as geotextiles) come in woven and nonwoven forms:
Together, these products prevent rutting, washouts, and subgrade contamination, making them essential for contractors who want to build right the first time.
At Stevenson Supply, we stock two trusted names: Winfab and Mirafi. Here’s a side-by-side look to help you pick the right fit.
Use Winfab for general jobs and drainage zones. Use Mirafi when the spec calls for it—or when you need high-performance reinforcement.
Proper installation is critical. Here’s a step-by-step guide to getting the most out of your geogrids and fabrics:
Avoid driving equipment directly on exposed fabric or grid. Use a working platform of base material to protect the product.
These materials show up in just about every heavy-duty jobsite:
At Stevenson Supply & Tractor Co., we know that getting the right product matters just as much as how you install it. We’ve supported Bay Area contractors with engineered fabric solutions for over 100 years.
Whether you’re building a vineyard road or laying a heavy-duty haul route, we stock the fabrics and grids that get the job done right.
Come visit our showroom
Give us a call at (707) 575-3335
Contact us online to request a quote
We’ll make sure your next job starts on solid ground.
President/CEO
Kent Stevenson is the owner and president of Stevenson Supply & Tractor Co., a family-owned equipment and supply company serving Sonoma County and the North Bay agricultural community since 1967. Under Kent’s leadership, the company has expanded from a small tractor dealership into a trusted regional provider of agricultural equipment, hardware, fencing, and repair services.
Kent is known for his deep agricultural knowledge, hands-on approach, and commitment to serving the local farming and vineyard community. His business philosophy blends old-fashioned service with modern efficiency, ensuring every customer—from homeowners to commercial growers—receives honest guidance and reliable equipment solutions.
Stevenson Supply continues to reflect the values Kent grew up with: hard work, integrity, and dedication to supporting the people who keep Sonoma County growing.