Improve the thermal efficiency of your building projects with the Sopratherm XR4000 PIR insulation board, supplied in a 2400 x 1200 x 120mm size. This multi-purpose rigid foam board delivers excellent thermal performance with a low thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit target U-values in new builds and refurbishments.

The board features a low emissivity foil facing on both sides, which provides improved thermal performance in sealed cavity air spaces to help lower achievable U-values further. Light and rigid, Soprema boards assist with ease of transportation, handling, and fitting on site.

Targeted at cut-to-fit applications between rafters and joists, this board is suitable for concrete slabs, beams and blocks, suspended timbers, and underfloor heating flooring applications. Sopratherm XR4000 has been assessed by the BBA as fit for use in defined roof, wall, and floor applications if installed, used, and maintained as set out in the certificate.

• 2400 x 1200 x 120mm size – provides substantial coverage and thickness for major insulation tasks
• 0.022 W/m.K thermal conductivity – delivers high thermal resistance to help meet U-value targets
• Low emissivity foil facing – improves thermal performance within sealed cavity air spaces
• Rigid and lightweight foam – ensures simple handling, cutting, and installation on site
• Multi-purpose application – suitable for floors, roofs, rafters, joists, and concrete slabs
• BBA assessed – certified fit for use in defined roof, wall, and floor constructions
• Available in a choice of sizes

Delivery & Returns

Delivery: This item is delivered to the kerbside or the nearest accessible road point at your property. The driver won't be able to bring it into your property, so please make sure you can move it from there.

Due to courier restrictions, we're unable to deliver this item to the following postcodes:
Scotland: AB10–16, AB21–25, AB30–39, AB41–45, AB51–56, IV1–28, IV30–32, IV36, IV40–56, IV63, KW1–17, PA1–20, PA21–38, PA41–49, PA60–78, PA80, PH1–26, PH30–44, PH49–50
Wales: LD1–8, LL21–49, LL51–78, SA1–20, SA31–48, SA61–73, SY15–25

Returns: As this is a bulky item, unwanted returns incur a £40 collection fee (replacing our standard £9 fee). There is no charge for items that are faulty, damaged or sent in error. To arrange a collection, please contact our Customer Services team.

This item will be delivered directly by our supplier. Lead times are shown on the product and trolley pages and are always advertised in working days (Monday to Friday).

• If your order contains items stocked by us and items that come direct from the supplier, your order will be automatically split and processed accordingly.
• We will pass the details you give us, including delivery details, your email address and your phone number, to the relevant supplier.
• Most of our suppliers can deliver to any UK address. Delivery to remote or offshore postcodes may take a little longer than the advertised lead time. If the supplier cannot deliver to your postcode or we believe your order may take longer, we will try to tell you beforehand.
• Items that come direct from a supplier will be delivered by the courier chosen by the supplier. Where possible, suppliers will update you with delivery information. This may be by email, phone call or text message.
• Items delivered direct from suppliers cannot be returned through a store. You would need to return these items direct to the supplier, unused and in their original packaging, at your expense. You can arrange for most items to be collected by contacting our Customer Services team. A fee of £9* will be taken off your refund. There is no charge for faulty items being collected. *For big and bulky items, additional charges may apply.
• Please note, you cannot return bespoke or made-to-measure items unless they are faulty.