Our 30mm XPS Insulation Boards offer an advanced insulation layer ideal for underfloor heating systems where maximum thermal retention is required. Designed for use on concrete or screeded subfloors, they significantly improve efficiency and comfort.
Despite the thicker profile, the boards remain lightweight, easy to handle, and simple to install—making them ideal for both tiled and floating floor systems.
- Approved by Ultra Tile – Assured compatibility with adhesives.
- Advanced Insulation Value – Thermal conductivity rated at 0.031 W/mK.
- Generous 30mm Thickness – Exceptional thermal efficiency.
- Sound Reduction – Helps control room-to-room noise.
- On-Site Flexibility – Easily cut and adapted as needed.
- Standard Sizing – 1200mm x 600mm per board (0.72m² coverage).
- High Compression Strength – Tested to 30 tonnes per m².
Installation Guidance
The Fastwarm® XPS insulation boards can be used beneath both tiled flooring and floating floor installations (such as laminate or engineered wood). However, installation methods will vary depending on the type of flooring and subfloor surface.
Undertile Installations:
Fix boards to the subfloor using a suitable flexible tile adhesive. When tiling over a timber subfloor, we recommend using our dedicated Fastwarm® Tile Backer Boards, which can be mechanically fixed in addition to being bonded with flexible adhesive.
Underwood Installations:
Lay the XPS insulation boards directly onto a clean, dry, and level subfloor in a brickbond pattern. Secure the joints using our heat-resistant Fastwarm® Duct Tape for added stability beneath floating floor finishes.
Please note: Boards are supplied in black. Blue colour shown in some images is for illustration only.
Choose the ideal board thickness to suit your project's build-up and insulation needs: 6mm | 10mm | 20mm | 50mm
| Thickness | 6mm, 10mm, 20mm, 30mm & 50mm |
|---|---|
| Board Dimension | 1200mm x 600mm |
| Material Type | Expanded Polystyrene |
| Thermal Conductivity | 0.031 W/mk |
| Material Density | 33 kg/m3 |
| Compressive Strength | 30 t/m2 |
| Moisture Absorption | < 0.1 vol % |
| Euroclass Fire Rating | E Euroclass |
Delivery Options
2-3 working day delivery
Next working day
Next working day before 10:30
Saturday Delivery
Delivery cut off times
Our final delivery time for Mondays to Thursday is 4:30pm. To give us a bit more time to ensure weekend deliveries are handled and our couriers have time to collect, the final delivery time on Fridays is 4:00pm.
Bank holidays may affect these delivery times, so please contact our team if unsure on 01268 744 479
Other Delivery Options
Pre 10:30am and Saturday delivery services are available on orders placed before 4:30pm. Any order placed before 4:30pm on a Friday will be delivered on the following Monday (unless its a bank holiday) so please select a Saturday service if a weekend delivery is required.
Delivery outside the UK
Delivery outside the mainland UK may be arranged by prior agreement. You will be notified of the amount of the charge for this service and will at that point have to make a decision whether you wish to proceed wth your order.
Important: Our deliveries rely on third party couriers, so, whilst we make every effort to deliver your order on the specified date and time, unfortunately there may be occasions when this will not be possible due to external influences. Due to this we strongly recommend you ensure you have received your order before any tradespeople/builders are scheduled to commence work.
Still Unsure? Talk to an expert
If you need any guidance or further information our highly experienced team are on hand to help.
Get in touch using our contact form or give us a call on 01268 744 479.
