EXPOL Under Floor Insulation ( R1.4 & R2.5 )

30% Recycled Content

Overview

The UnderFloor Insulation range delivers proven thermal performance for New Zealand homes, helping create warm, dry, and healthy living environments. Designed to fit snugly between timber floor joists, these rigid insulation panels are ideal for both new builds and existing homes.

Available in two R-value options — R1.4 White and R2.5 — the range includes products engineered to meet the latest Building Code changes (effective 1 May 2023). Each panel is lightweight, easy to install, and available in four standard joist widths (360mm, 410mm, 470mm, 560mm), making it a popular DIY insulation solution.

Manufactured from Expanded Polystyrene (EPS), with options featuring graphite infusion for higher performance, these durable boards won't degrade over time and require no maintenance. With a 50-year product warranty, homeowners can be confident in long-lasting comfort and energy efficiency.

All products contain recycled content and can be fully recycled at the end of their life, supporting a more sustainable New Zealand.

R-Grade Comparison

1200mm in length, 60mm and 100mm thick in four standard widths 360, 410, 470, 560.

Premium UnderFloor Products Range

R1.4 White UnderFloor Insulation

A proven solution for timber floor insulation, the R1.4 White UnderFloor panel is a rigid white board made from Expanded Polystyrene (EPS). Each panel measures 1200mm in length and comes in four standard widths to fit between most joists.

Trusted by New Zealand homeowners for over 25 years, this durable and effective insulation helps create warmer, drier, healthier homes. Made with recycled content, it's a cost-effective choice for improving comfort and reducing energy use.

R2.5 UnderFloor Insulation

The R2.5 UnderFloor panel represents the next generation of insulation, engineered to meet the updated Building Code requirements (effective 1 May 2023). Manufactured from Expanded Polystyrene containing recycled content, the boards are 1200mm long, 100mm thick, and available in four standard widths (360, 410, 470, 560mm).

Perfect for typical New Zealand suburban and rural homes, this insulation provides excellent thermal protection without compromising sustainability. It's BRANZ appraised, recyclable, and backed by a 50-year product warranty for long-term peace of mind.

Why Choose EXPOL Premium?