Celotex PL4000 Insulated Plasterboard 2400 × 1200mm – 37.5mm (25mm + 12.5mm, now Sopratherm PL4025, 2.88m² sheet)
Celotex PL4000 Insulated Plasterboard 2400 × 1200mm – 37.5mm (25mm + 12.5mm, now Sopratherm PL4025, 2.88m² sheet)
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- Genuine manufacturer stock
- Trade pricing, shown ex VAT
- Call 03330 908479 for bulk quotes
Celotex PL4025 is now made and sold as Sopratherm PL4025 (sometimes searched for as Sopretherm or Supertherm). It is an insulated plasterboard for dry lining walls: 25mm of PIR insulation bonded to 12.5mm tapered-edge plasterboard, 37.5mm in total. Fix it to masonry walls with dabs and mechanical fixings, or to timber or metal studs, then tape and joint or skim as normal. Declared thermal conductivity of the PIR core is 0.022 W/mK and the thermal resistance of the board is 1.20 m²K/W according to Soprema's datasheet. Priced per 2400 × 1200mm sheet (2.88m²).
Specifications
| Brand | Celotex (now Sopratherm, made by Soprema) |
|---|---|
| Range | Celotex PL4000 / Sopratherm PL4000 |
| Product code | PL4025 |
| Total thickness | 37.5mm |
| Make-up | 25mm PIR + 12.5mm plasterboard |
| Board size (L × W) | 2400 × 1200mm |
| Coverage per sheet | 2.88m² |
| Plasterboard edge | Tapered |
| Thermal conductivity (λ, PIR core) | 0.022 W/mK |
| Thermal resistance (R-value) | 1.20 m²K/W |
| Reaction to fire | Euroclass B-s1,d0 |
| BBA certificate | 25/7366 |
| Sold as | Per sheet |
Delivery
Free delivery to England & Wales on every order; minimum order £400 + VAT. Delivered by Moffett lorry (forklift offload); someone must be present to receive it.
Downloads & technical information
- Sopratherm PL4000 technical datasheet (PDF)
- Sopratherm PL4000 Declaration of Performance (PDF)
- BBA certificate – Sopratherm PL4000 (PDF)
- Sopratherm PL4000 product page (manufacturer website)
FAQs
Is this the same as Celotex PL4000?
Yes. Celotex PL4000 has been renamed Sopratherm PL4000 following Soprema's purchase of Celotex. This board is code PL4025.
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 wall area (m²) by 2.88 and round up, allowing extra for openings and cutting.
What are the delivery charges?
Free delivery to England & Wales on every order; minimum order £400 + VAT. Delivered by Moffett lorry (forklift offload); someone must be present to receive it. We deliver to England and Wales only; we cannot deliver to Scotland, Northern Ireland or the islands.
Where can I find U-values and installation guidance?
See the Soprema datasheet and BBA certificate linked above, try our PIR U-value calculator, or call us on 03330 908479.
Thickness & R-value table – this product: R 1.20 m²K/W
Thickness & R-value table – this product: R 1.20 m²K/W
Celotex PL4000 / Sopratherm PL4000 Insulated Plasterboard – all 4 thicknesses we stock.
| Thickness | λ (W/mK) | R-value (m²K/W) |
|---|---|---|
| 37.5mm (25 + 12.5) this product | 0.022 | 1.20 |
| 52.5mm (40 + 12.5) | 0.022 | 1.85 |
| 62.5mm (50 + 12.5) | 0.022 | 2.30 |
| 77.5mm (65 + 12.5) | 0.022 | 3.00 |
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
Delivery
Free delivery on orders over £350 ex VAT.
Insulation and building materials: free delivery on every order, minimum order £400 ex VAT. Suspended ceilings (grid, tiles and wire): minimum order £150 ex VAT, £35 ex VAT delivery under £350 ex VAT, free from £350 ex VAT.
We deliver to England and Wales only (not Scotland or Northern Ireland). Delivery timing depends on stock and location; contact us before ordering if your project has a deadline.
Deliveries arrive on a Moffett lorry (truck-mounted forklift) and are offloaded at your site. Someone must be present to receive the delivery, and we need a contact phone number for the driver.
