EXPOL INSULATION - R1.8

Expol Black R1.8 is a graphite-enhanced underfloor insulation board engineered to deliver a product R-value of 1.8 m²·K/W—30 % more efficient than standard EPS. Designed for 410 mm joist centres, its rigid profile won’t sag over time and it’s backed by a 50-year limited warranty. Concertina edges allow quick scoring with a utility knife and clean snapping for a precise fit. Moisture-resistant and containing fire-retardant additives, Expol Black also reduces impact noise from timber floors. Lightweight and easy to handle, it helps lower energy bills and your carbon footprint, while providing year-round comfort—keeping your home warm in winter and cool in summer.  

Key Benefits of Expol Black R1.8

✔ High Thermal Performance – R-value of 1.8 m²·K/W (30 % more efficient than standard EPS)
✔ Perfect Joist Fit – Engineered for 410 mm joist centres for a seamless install
✔ Long-Term Stability – Rigid graphite-enhanced board won’t sag over decades
✔ Easy Precision Cutting – Concertina edges score with a utility knife and snap cleanly
✔ Moisture-Resistant – Closed-cell EPS repels water, preventing damp and mould
✔ Fire Safety – Contains non-halogen fire-retardant additives for enhanced protection
✔ Noise Reduction – Dampens impact noise from timber floors for quieter living spaces
✔ Lightweight Handling – Simple to carry and position beneath suspended floors
✔ Eco-Friendly Offcuts – Leftovers can be recycled at polystyrene collection points
✔ Carbon & Cost Savings – Helps lower energy bills and reduce your home’s carbon footprint