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6 Reviews
View Product Reviews37.5mm Celotex PL4025 Insulated Plasterboard 2400mm x 1200mm
| 6+ sheets | 12+ sheets | 18+ sheets |
| £28.91ex. VAT | £28.61ex. VAT | £28.31ex. VAT |
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Product Overview
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £15 ex. VAT |
| Between £100 - £300 ex. VAT | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{holiday_village}} Use in internal walls and pitched roofs
- {{compress}} Combines insulation & drylining
- {{thermostat}} 0.022 W/mK thermal conductivity
- {{verified_user}} BBA certified
Technical Specification
| Material Type: | PIR |
|---|---|
| Thickness: | 37.5mm |
| Width: | 1200mm |
| Length: | 2400mm |
| Sales Unit: | Sheet |
| Sales Unit Coverage: | 2.88m2 |
| Brand: | Celotex |
| Manufacturer's Reference: | PL4025 |
| Weight: | 28.77kg |
| Thermal Conductivity: | 0.022W/mK |
Technical Downloads
Product Overview
Insulated plasterboard, measuring 37.5mm in overall thickness for use on internal walls and ceilings.
Manufactured as part of the PL4000 range, it combines a rigid polyisocyanurate (PIR) insulation core with a 12.5mm tapered-edge plasterboard lining. This dual-purpose construction improves thermal performance while providing a surface that is ready for direct decoration.
The PIR layer is faced with foil to enhance insulation and act as a vapour control barrier, reducing heat loss and helping to manage moisture within the building fabric.
The bonded plasterboard eliminates the need for a separate lining, saving time on site and ensuring a neat internal finish.
At 37.5mm thick (25mm PIR plus 12.5mm plasterboard), it is the most widely used size in the PL range, offering a practical balance between insulation performance and minimal loss of internal floor space.
Features & Benefits
- 2-in-1 board (insulation + plasterboard): Speeds up installation by combining thermal lining and finishing in a single sheet.
- PIR insulation core (0.022 W/m·K): Reduces heat loss while limiting required build-up depth.
- Tapered edge plasterboard: Allows for neat jointing, skim finishing, and a paint-ready surface.
- Inbuilt vapour control layer: Provides moisture resistance and helps limit condensation risk.
- Lightweight but rigid: Easy to cut, handle, and install with standard tools.
- Environmental credentials: Zero ODP, low GWP blowing agent, and BRE Green Guide Rating A+.
- BBA certified (16/5357): Approved for use in roofs and internal wall applications.
- Board size 2400 x 1200mm: Standard plasterboard dimensions minimise joints and speed coverage.
- Thickness 37.5mm (25mm + 12.5mm): Versatile choice for refurbishments and meeting minimum Building Regulations.
Applications
- Solid masonry walls: Upgrading thermal performance with a drylined finish.
- Roofs (pitched/flat): Used as the underneath layer of insulation between or under rafters and joists.
- Timber frame lining: Provides thermal lining and ready-to-finish surfaces in frame constructions.
- Internal wall and ceiling linings: Fast, efficient upgrade in both new-build and refurbishment projects.
Installation Guidance
- Fixing options: Suitable for dot-and-dab adhesive bonding or mechanical fixings.
- Joint treatment: Use joint tape and compound at tapered edges for a smooth finish.
- Cutting and handling: Score and snap plasterboard; use fine-toothed saw for PIR core; handle with care to avoid edge damage.
- Moisture precautions: Store flat, dry, and covered; protect from prolonged sunlight or damp before installation.
Compliance & Performance
- Thermal conductivity: 0.022 W/m·K (PIR insulation).
- Reaction to fire: Euroclass B-s1, d0 (BS EN 13501-1).
- Compressive strength: ≥120 kPa (BS EN 826).
- Environmental performance: Zero ODP, low GWP, BRE Green Guide Rating A+.
Customer Reviews
Both the insulation and plasterboard attached to it arrived in perfect condition. Great solution for when you need to install thermal insulation and drywall. With this product you can do both at the same time.
Quality product at a great price
nicely made
no complaints
Great!
installed quickly. will buy again
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