Geogrid vs Geotextile: What’s the Difference and Which Should You Use?

When it comes to soil stabilization, base reinforcement, and drainage in construction, two products often come up in conversation — geogrid and geotextile. While they might seem similar at first glance, their design, function, and benefits are very different. In this guide, we’ll break down exactly what each product does, when to use them, and why many projects use both together.

What is a Geogrid?

A geogrid is a high-strength polymer grid with open, interlocking apertures designed to reinforce aggregate and soil. It’s engineered to improve load distribution, stabilize weak subgrades, and extend the life of pavements.

Key Features of Geogrids:

• Constructed from polypropylene, polyester, or HDPE
• Biaxial or triaxial designs for strength in one or multiple directions
• Open-grid structure for aggregate interlock
• High tensile strength for superior load support
• Designed for reinforcement, not filtration

Common Geogrid Applications:

• Base reinforcement for roads, parking lots, and airport runways
• Slope stabilization and erosion control
• Retaining wall reinforcement
• Industrial yards and heavy-load areas

What is a Geotextile?

A geotextile is a permeable synthetic fabric designed for separation, filtration, and drainage. Unlike geogrids, geotextiles do not add structural reinforcement — instead, they act as a barrier that allows water to pass while keeping soils and aggregates from mixing.

Key Features of Geotextiles:

• Made from woven or nonwoven synthetic fibers
• Permeable — allows controlled water flow
• Prevents contamination between soil layers
• Maintains stability by keeping materials separate

Common Geotextile Applications:

• Separation between aggregate base and subgrade soil
• Erosion control under riprap or slope protection systems
• Drainage behind retaining walls and in French drains
• Filtration in stormwater management systems

Geogrid vs Geotextile: The Core Difference

In many cases, geogrid and geotextile are used together — the geotextile provides separation and drainage, while the geogrid adds reinforcement strength.

Which Should You Use?

• If your goal is to reinforce a weak base layer → Use geogrid.
• If your goal is to separate materials and allow drainage → Use geotextile.
• If you need both functions → Install geotextile beneath geogrid for maximum performance.

Why Choose Asphalt Fabrics & Supply?

At Asphalt Fabrics & Supply, we supply a full range of geogrids and geotextiles for road construction, commercial paving, and civil engineering projects. Our experts can recommend the right material type, strength, and installation method to ensure long-lasting performance.