Wall Insulation

Walls are a major source of heat loss in New Zealand homes and commercial buildings. EXPOL solid EPS wall insulation panels deliver long-term thermal performance in narrow or restricted wall cavities — supporting warmer, healthier indoor environments without increasing wall thickness or compromising design.

EXPOL ThermaSlab offers an economical solution for meeting Building Code requirements, while EXPOL Platinum Board, a graphite-infused premium EPS product, achieves higher R-values relative to thickness — ideal for energy-efficient new builds or retrofit upgrades where space is limited.

Manufactured from 98% trapped air within a 2% cellular matrix, EXPOL insulation sheets are lightweight, rigid, easy to handle and fast to install. Resistant to moisture, decay and pests, and will not slump, sag or settle over time, ensuring the R-value is retained for the life of the building. Both products can be supplied in standard widths or cut to custom sizes, allowing efficient installation between timber or steel studs.

Used in wall cavities, EXPOL insulation helps manage internal moisture and condensation risk between lining and cladding — supporting a dry, comfortable and healthy indoor environment. Containing recycled material and fully recyclable through EXPOL's nationwide programme, these solutions support sustainable construction outcomes in both new builds and renovations.

Accessories such as EXPOL WireGuard provide safe separation from electrical wiring, and specification support and installation guidance are available to help achieve performance expectations for residential, commercial and retrofit projects.