GAP 20 (Coarse Builder Mix)
Our GAP 20 (Coarse Builder Mix) is a widely used basecourse aggregate combining a full gradation of fines and coarse particles up to 20mm. When compacted, it forms a dense and durable base ideal for construction work that requires strength, stability, and reliable performance.
This is one of NZ’s most popular basecourse materials for small to medium construction projects.
Ideal Applications
- Driveways & accessways
- Patios & concrete slab preparation
- General construction bases
- Footpaths & light roading
- Paver foundation layers
- Under concrete pads for sheds, workshops, or small buildings
GAP 20 delivers excellent compaction strength while remaining workable and easy to spread.
Why Choose GAP 20?
✔ Strong Structural Performance
A go-to basecourse for foundations that must resist movement and settling.
✔ Excellent Compaction
Fines interlock with coarse particles, forming a dense, load-bearing surface.
✔ Ideal for Builders & Contractors
Reliable, predictable performance in slab prep, driveways, and general groundwork.
✔ Durable & Long-Lasting
Perfect for surfaces that will support vehicles or foot traffic.
✔ Delivered Locally & NZ-Wide
Supplied from Hamilton with wide distribution across Waikato.
Specifications
Size: 0-20mm GAP
Material: Full-grade compaction aggregate
Use: Driveways, slabs, general construction bases
Performance: High compaction, stable, load-bearing
