.jpg)
6 Reviews
View Product Reviews37.5mm Celotex PL4025 Insulated Plasterboard 2400mm x 1200mm
Coverage required
Insulated plasterboard combining PIR insulation with a plasterboard finish. Suitable for internal wall and ceiling linings. Most popular thickness, meeting minimum Building Regulations.
Nationwide Delivery
Fri 19 Sep
- 0days
- 14hrs
- 3mins
- 36secs
Learn more
Pay in 3 interest-free payments
Split your purchase of £30.50 into 3 with no sign-up fees or late fees.
£10.17
today
£10.17
1 month
£10.17
2 months
How it works
- Choose PayPal at checkout to pay later with Pay in 3.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Pay in 3 is a form of credit, so carefully consider whether the purchase is affordable and how you will make the repayments. Be aware of the possible impact of using Pay in 3 and of missing payments, including making other borrowing more difficult or more expensive. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Available for purchases of £30 to £2,000. Terms and conditions apply. PayPal Pay in 3 is a trading name of PayPal (Europe) S.à r.l. et Cie, S.C.A. 22-24 Boulevard Royal L-2449, Luxembourg.
Learn more
Buy now. Pay with Klarna at your own pace.
Get what you need for your next project, choose how you pay.
Pay in 30 days
£30.50
Pay in full
Klarna's Pay in 30 days is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
Pay over time
£10.17
Every 30 days
Pay in 3
£10.17
today
£10.17
in 30 days
£10.17
in 60 days
Klarna's Pay in 3 is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
How it works
- At checkout select Klarna.
- Choose your payment plan.
- Different payment plans may be shown depending on the purchase amount and credit score.
- Complete your checkout.
- The amount will be charged based on the payment plan you chose.
Learn more
Pay in 4 interest-free payments
Split your purchase of £30.50 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
£7.63
today
£7.63
second payment
£7.63
third payment
£7.63
fourth payment
How it works
- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/en-GB
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
Product Overview
Insulated plasterboard combining PIR insulation with a plasterboard finish. Suitable for internal wall and ceiling linings. Most popular thickness, meeting minimum Building Regulations.
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 combining PIR insulation with a plasterboard finish.
Part of the PL4000 range, it delivers high insulation levels while providing a ready-to-decorate lining for internal walls and ceilings.
At 37.5mm overall thickness (25mm PIR bonded to 12.5mm plasterboard), this is the most popular size, balancing insulation performance with minimal loss of internal 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
Leave a Review
Related Articles
Is Insulated Plasterboard Worth It?
Exploring the Different Types of Plasterboard
How To Cut Plasterboard: A Step-by-Step Guide
How To Fix Plasterboard
How To Install Celotex Insulation Boards
