High-Performance Slab Edge Insulation
Building Product Information SheetThermaSlab Edge is EXPOL's next‑generation slab‑edge insulation system engineered for New Zealand's updated Building Code requirements. It's designed for both new builds and retrofit projects, giving specifiers and builders a straightforward, high‑performance solution that boosts a building's thermal efficiency and holds its integrity for decades. Compared with many traditional edge systems, ThermaSlab Edge cuts installation time, resists moisture, and avoids the need for painting when using the pre‑coated boards.
Available ThermaSlab Edge Options
- Pre‑coated boards
Ready to go, no paint required, ideal when you want the cleanest, quickest install.
- Uncoated insulation boards
Standard boards that are plastered after the concrete pour, giving flexibility for finishes and detailing.
Key Features & Benefits
Why Choose ThermaSlab Edge?
Code-Compliant Performance
Specifically engineered to meet the latest NZ Building Code H1 requirements, ThermaSlab Edge provides confidence that your design meets modern insulation and energy efficiency standards with ease.
Long-Term Durability
Manufactured from high-density expanded polystyrene (EPS), ThermaSlab Edge is moisture-resistant and non-degrading, ensuring lasting performance throughout the building's lifecycle.
Design and Installation Flexibility
Suitable for both new construction and retrofit applications, the system integrates seamlessly with a variety of foundation designs.
Learn more about specific applications
Click a solution below to view installation guides and full system details
Technical Data
| Properties | Test Results |
|---|---|
| Material | Uncoated - Extruded Polystyrene. Coated - Extruded Polystyrene with a water-based, waterproof resin coating. |
| Density | 30 kg / m³ |
| Sheet Size | 2500 mm x 300 mm 2500 mm x 400 mm |
| Thickness / Product R Value | |
| 30mm | R 1.0 |
Warranty & Compliance
Warranty and New Zealand Building Code information as published in the ThermaSlab Edge (XPS) technical data sheet.
| Specification | Detail |
|---|---|
| Warranty | 15-year warranty on EXPOL XPS foam insulation products |
| NZ Building Code clauses | Clause B2 Durability B2.3.1(a), B2.3.1(b); Clause E3 Internal moisture E3.3.1; Clause F2 Hazardous building materials F2.3.1(a) |
| Energy efficiency | BRANZ, H1 Energy efficiency performance H1.3.1(a), H1.3.2(e) |
| Building Act 2004 | EXPOL XPS is not subject to a warning or ban under the Building Act 2004 |
For full warranty details see the Warranty page, or download the technical data sheet above.