XPS insulation

Maximise the efficiency of your underfloor heating system with high-performance underfloor heating insulation boards. At Underfloor Heating 1, we supply premium-grade XPS insulation to reduce heat loss, cut energy bills, and ensure your heating system performs at its best.

XPS insulation (Styrofoam LBH-X-P) available in 10mm / 20mm / 30mm.
All boards are 1200mm x 600mm, 300kPa (compressive strength).

Why Use Underfloor Heating Insulation?

Installing underfloor heating insulation boards beneath your system can make a huge difference in both performance and energy savings. Without proper insulation, a significant portion of the heat generated by your system can be lost downwards into the subfloor, reducing effectiveness.

By using XPS (extruded polystyrene) underfloor heating insulation boards, you benefit from:

• Reduced heat loss into the subfloor
• Faster heat-up times
• Greater energy efficiency
• Lower running costs
• A more responsive and consistent heating system
• Improved comfort throughout your home

Benefits of Our XPS Underfloor Heating Insulation Boards

• Lightweight and easy to cut to size
• High compressive strength – suitable for both tiled and floating floors
• Water-resistant and long-lasting
• Compatible with most underfloor heating systems
• Available in various thicknesses to suit your project requirements
• Ideal for both renovation and new-build projects

Perfect for Electric Underfloor Heating Systems

Our underfloor heating insulation boards are especially effective when used with electric underfloor heating mats and wet underfloor heating kits, helping to reflect heat upwards and improve overall performance.

Installation Is Quick and Simple with Our Underfloor Heating Insulation Boards

Our XPS boards are lightweight, easy to cut, and simple to lay. They’re designed to sit directly on the subfloor, with heating elements installed over the top. For tile floors, a flexible tile adhesive is recommended to secure the boards before adding your UFH system.

If you're using a timber subfloor, our underfloor heating insulation boards also help reduce floor movement and provide a more stable base for tiling.

Get Your Underfloor Heating Insulation Today

Enhance the performance of your flooring system with our high-quality XPS Insulation boards—ideal for both new builds and renovations. Designed to provide superior thermal efficiency and long-lasting durability, our insulation helps you reduce heat loss and cut energy costs.

Not sure which insulation solution is right for your project? Our team of experts is here to help—reach out today for tailored advice and product recommendations.

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Underfloor Heating Insulation Boards FAQs

Do I need insulation under underfloor heating?

Yes – without proper insulation, much of the heat generated by your underfloor heating system will be lost downwards into the subfloor. Underfloor heating insulation boards help reflect heat upwards where it’s needed, improving both comfort and efficiency.

What type of insulation is best for underfloor heating?

XPS insulation boards are ideal due to their high compressive strength, moisture resistance, and thermal insulation properties. They’re also lightweight and easy to install.

Can I use insulation boards with electric underfloor heating?

Absolutely. In fact, they’re especially recommended with electric systems to ensure quick heat-up times and minimise energy loss.

What thickness of underfloor heating insulation board do I need?

This depends on your subfloor and floor finish. Common thicknesses range from 6mm to 20mm. Thicker boards offer better insulation, but may slightly raise the floor height.