Contact us: Kingspan Insulation; Kingspan Technical Insulation

Kingspan Great Britain: Kingspan Insulation; Kingspan Technical Insulation

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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

Our Heavy Duty Floor Insulation Solutions

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Page updated: 24/06/2025

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Compare heavy duty floor insulation products

Product	Type	Thermal conductivity (W/mK)	Density (kg/m3)	Compressive strength (kPa)

Insulation Boards

Heavy-Duty Floor Insulation

Our range of rigid extruded polystyrene heavy-duty floor insulation products come in a range of thicknesses and thermal conductivity values which are perfect for new build and refurbishment projects.

Insulation Boards

Where to buy our products

Our insulation boards are stocked up and down the country. Use the interactive map to find your nearest stockist.

Happy Couple Hanging Picture on the Wall, Boyfriend Moves It, Girlfriend Tells Him when the Frame is Hanging Straight. Funny Moment in Young Couple's Life. Modern Stylish Apartment.

Insulation Boards

Homeowners Hub

Whether you're looking to keep your home warmer, cut energy bills, or upgrade your insulation, you'll find clear advice on choosing the right products.