GATT Surfacing, or Graded Aggregate Total Treatment, is a specialty pavement solution designed to transform gravel roads into durable, skid-resistant, and dust-free surfaces. Using a unique binder and graded aggregate system, GATT offers a cost-effective alternative to routine grading and re-gravelling, delivering long-term performance for rural and metropolitan networks.

Why Choose GATT Surfacing?

Gravel roads require frequent grading and re-gravelling, increasing maintenance costs and safety risks. GATT Surfacing provides a sealed surface that:

• Prevents erosion caused by traffic and weather
• Improves travel times and all-weather accessibility
• Enhances community amenity by reducing dust
• Offers a higher initial cost but lower whole-of-life cost compared to routine maintenance

Technical Details

• Self-priming binder penetrates the base and graded aggregate
• Creates a mastic of binder, fines, and aggregate for strength
• Can be applied without costly reconstruction of the existing pavement
• Requires well-compacted gravel base and effective drainage for best performance

GATT Surfacing vs Basic Spray Seal

Frequently Asked Questions

What makes GATT different from other spray seals?
GATT uses a special binder and graded aggregate that penetrates the base, creating a flexible, durable surface with self-healing properties.

Can GATT be applied to any gravel road?
It works best on roads with a strong, well-compacted base and good drainage.

Is GATT suitable for heavy traffic?
Primarily designed for light to medium traffic, but has been used successfully in specific heavy-loading applications.

Does GATT reduce dust?
Yes. It eliminates dust and improves quality of life for communities near unsurfaced roads.