Celotex XR4000 PIR Insulation Board 2400 × 1200mm – 150mm (now Sopratherm XR4150, 2.88m² sheet)
Celotex XR4000 PIR Insulation Board 2400 × 1200mm – 150mm (now Sopratherm XR4150, 2.88m² sheet)In stock
Minimum order £400 ex VAT, free delivery in England · Mainland Wales & Scotland: minimum order £400 ex VAT + £40 + VAT delivery
Delivery timing depends on stock and location; contact us before ordering if your project has a deadline. Full delivery rules
Spread the cost: pay in 3 with Klarna, PayPal or Shop Pay at checkout Subject to status.
Bulk orders? Call 03330 908479 or contact us for a bulk quote.
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Other thicknesses (same range, each thickness is its own product)
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How many do I need?
This product covers 2.88m² per sheet, as shown in the product title. Enter the area you need to cover.
For a full take-off, try the insulation calculator, or check a build-up with the PIR U-value calculator.
Delivery
Minimum Celotex order £400 ex VAT, free delivery in England · Mainland Wales & Scotland: minimum order £400 ex VAT + £40 + VAT delivery · Full delivery rules
- Free delivery in England
- Minimum Celotex order £400 ex VAT. Celotex is delivered separately, so other items don’t count towards it.
- Mainland Wales & Scotland: £400 ex VAT minimum plus £40 + VAT delivery (Scottish islands not covered).
Minimum order applies: add £400.00 ex VAT of these items to reach the £400 ex VAT minimum order.
Delivery timing depends on stock and location; contact us before ordering if your project has a deadline. Full delivery details · Urgent courier quote (extra charge) · 03330 908479
Technical datasheet (PDF) – opens the manufacturer's document in a new tab
BBA certificate (PDF) – 25/7318 – opens the BBA Agrément Certificate in a new tab
Safety data sheet (PDF) – opens the manufacturer's safety data sheet in a new tab
- Genuine manufacturer stock
- Trade pricing, shown ex VAT
- Call 03330 908479 for bulk quotes
Need a quote for a bigger job?
For larger quantities or a full project list, call us, send a message or chat on WhatsApp. We will come back with a quote.
Celotex XR4150 (150mm) is now made and sold as Sopratherm XR4150. Soprema bought Celotex from Saint-Gobain and rebranded the range, so the Celotex XR4000 boards you know are now Sopratherm XR4000 (sometimes searched for as Sopretherm or Supertherm). It is a thicker PIR board for pitched roofs, floors and walls where you need a low U-value from a single layer. The board has a PIR foam core with low-emissivity composite foil facings on both sides, a declared thermal conductivity of 0.022 W/mK and, at 150mm, a thermal resistance of 6.80 m²K/W according to Soprema's datasheet. Priced per 2400 × 1200mm sheet (2.88m²).
Specifications
| Brand | Celotex (now Sopratherm, made by Soprema) |
|---|---|
| Range | Celotex XR4000 / Sopratherm XR4000 |
| Product code | XR4150 |
| Thickness | 150mm |
| Board size (L × W) | 2400 × 1200mm |
| Coverage per sheet | 2.88m² |
| Material | PIR core, low-emissivity composite foil facings |
| Thermal conductivity (λ) | 0.022 W/mK |
| Thermal resistance (R-value) | 6.80 m²K/W |
| Compressive strength | CS(10\Y)140 (≥140 kPa) |
| Reaction to fire | Euroclass F |
| Product standard | BS EN 13165 |
| BBA certificates | 25/7318 and 25/7329 |
| Manufacturer pack | 2 boards |
| Sold as | Per sheet |
Delivery
£400 ex VAT minimum with free delivery in England. Also available to mainland Wales and mainland Scotland for £40 ex VAT on every order.
Downloads & technical information
- Sopratherm XR4000 technical datasheet (PDF)
- Sopratherm XR4000 Declaration of Performance (PDF)
- BBA certificate – Sopratherm TB4000, GA4000 and XR4000 for floor insulation (PDF)
- BBA certificate – Sopratherm TB4000, GA4000 and XR4000 for dry lining (PDF)
- BBA certificate – Sopratherm TB4000, GA4000 and XR4000 for pitched roof insulation (PDF)
- Sopratherm XR4000 product page (manufacturer website)
See the full range of Celotex insulation boards (now Sopratherm).
FAQs
Is this the same as Celotex XR4000?
Yes. Celotex XR4000 has been renamed Sopratherm XR4000 following Soprema's purchase of Celotex. The 150mm board is code XR4150, and the declared performance (λ 0.022 W/mK) is the same. You may receive boards printed with either name during the changeover.
What does the price cover?
The price shown is ex VAT and is for one 2400 × 1200mm sheet (2.88m²).
How many sheets do I need?
Use our insulation calculator, or divide the area (m²) by 2.88 and round up, allowing around 10% extra for cutting and waste.
What are the delivery charges?
Celotex orders: minimum order £400 ex VAT, with free delivery in England. Celotex is delivered separately from our other products, so other items don’t count towards these amounts. We deliver this product in England under our usual England delivery rules. We can also deliver it to mainland Wales and mainland Scotland for £40 ex VAT on every order. We do not deliver to Northern Ireland or the Scottish islands.
Where can I find U-values and installation guidance?
See the Soprema datasheet and BBA certificates linked above, try our PIR U-value calculator, or call us on 03330 908479.
| BBA Agrément Certificate | 25/7318 |
|---|
Quick answers
- What size is Celotex XR4000 PIR Insulation Board 2400 × 1200mm – 150mm and how much does it cover?
- Size: 2400 × 1200mm; thickness: 150mm; coverage: 2.88m²; sold as: Per sheet; manufacturer pack: 2 boards. Prices are shown ex VAT.
- What is Celotex XR4000 PIR Insulation Board 2400 × 1200mm – 150mm used for?
- It is a thicker PIR board for pitched roofs, floors and walls where you need a low U-value from a single layer. Celotex boards are now made and sold under the Sopratherm name.
- What is the thermal and fire performance of Celotex XR4000 PIR Insulation Board 2400 × 1200mm – 150mm?
- According to the manufacturer's data listed on this page: declared thermal conductivity (λ) 0.022 W/mK; thermal resistance (R-value) 6.80 m²K/W; reaction to fire Euroclass F.
- What does delivery cost and is there a minimum order?
- Celotex orders have a £400 ex VAT minimum with free delivery in England. Celotex is delivered separately, so other products don’t count towards the minimum. We can also deliver Celotex to mainland Wales and mainland Scotland for £40 ex VAT on every order. We do not deliver to Northern Ireland or the Scottish islands. Call 03330 908479 or email sales@insulationwarehousedirect.co.uk for help or bulk quotes.
Thickness & R-value table – this product: R 6.80 m²K/W
Thickness & R-value table – this product: R 6.80 m²K/W
Celotex / Sopratherm PIR Insulation Board (TB4000, GA4000, XR4000) – all 13 thicknesses we stock.
| Thickness | λ (W/mK) | R-value (m²K/W) |
|---|---|---|
| 20mm | 0.022 | 0.90 |
| 25mm | 0.022 | 1.10 |
| 30mm | 0.022 | 1.35 |
| 40mm | 0.022 | 1.80 |
| 50mm | 0.022 | 2.25 |
| 60mm | 0.022 | 2.70 |
| 70mm | 0.022 | 3.15 |
| 75mm | 0.022 | 3.40 |
| 80mm | 0.022 | 3.60 |
| 90mm | 0.022 | 4.05 |
| 100mm | 0.022 | 4.50 |
| 120mm | 0.022 | 5.45 |
| 150mm this product | 0.022 | 6.80 |
R-value = thickness (m) ÷ thermal conductivity λ, using the λ declared for each product, rounded down to the nearest 0.05 m²K/W. Always check the manufacturer's declaration of performance and your U-value calculation for Building Regulations.
Delivery information
Delivery information
Minimum order £400 ex VAT. Free delivery in England. Mainland Wales and Scotland: £400 ex VAT minimum plus £40 + VAT delivery.
Insulation, plasterboard, drylining, ceilings, timber, aggregates and cement. Separately delivered ranges have separate minimums. Access panels and Evolution fixings have their own delivery rules.
Delivery timing depends on stock and location; contact us before ordering if your project has a deadline.
