U-value Calculator
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Choosing the best heavy-duty floor insulation for your project
Selecting the right heavy-duty floor insulation is essential for ensuring durability and energy efficiency in any construction project.
Our heavy-duty floor insulation is made from rigid extruded polystyrene (XPS) with a closed-cell structure, which effectively resists groundwater absorption and prevents the passage of water vapour.
We offer heavy-duty floor insulation in a variety of thicknesses, thermal conductivity levels, and compressive strength. Kingspan’s heavy-duty floor insulation is available in multiple grades, making it suitable for a wide range of service loads.
Benefits of our heavy-duty floor insulation:
- Low thermal conductivity – as low as 0.033 W/mK
- High compressive strength – from 300 - 700 kPa
- Minimal water absorption and resistant to ground moisture penetration
- Withstands freeze / thaw cycling
Compare heavy duty floor insulation products
Product | Type | Thermal conductivity (W/mK) | Density (kg/m3) | Compressive strength (kPa) |
Rigid extruded polystyrene insulation | 0.033 W/mK (30 - 180 mm) | 30 | 300 | |
Rigid extruded polystyrene insulation |
| 35 | 500 | |
Rigid extruded polystyrene insulation | 0.035 W/mK (50, 60 & 80 mm) | 45 | 700 |
Page Updated 01/08/2025
