.jpg)
.jpg)
.jpg)
20 Reviews
View Product Reviews50mm Celotex GA4050 PIR Insulation Board 2400mm x 1200mm
| 15+ boards | 30+ boards | 40+ boards |
| £18.60ex. VAT | £18.41ex. VAT | £18.23ex. VAT |
Coverage required
Express Delivery
Wed 7 May
Standard Delivery
Fri 9 May
- 0days
- 7hrs
- 46mins
- 9secs
Learn more
Pay in 3 interest-free payments
Split your purchase of £18.79 into 3 with no sign-up fees or late fees.
£6.26
today
£6.26
1 month
£6.26
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
£18.79
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
£6.26
Every 30 days
Pay in 3
£6.26
today
£6.26
in 30 days
£6.26
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 £18.79 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
£4.70
today
£4.70
second payment
£4.70
third payment
£4.70
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 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
Frequently Bought With
+-+Photo.jpg)
.jpg)
Klarna's Pay in 3 / Pay in 30 days are unregulated credit agreements. 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. Late fees may apply. Ts&Cs apply
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/apply
Delivery & Returns Information
All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, CF, DD, DG, KW, IV, LD, LL, NP, PH, SA and SY. If your delivery address is in any of these postcode areas a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.
Standard (Nationwide) Delivery
|
Core Products Core
|
|
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 ex. VAT | £25 ex. VAT |
| Over £300 ex. VAT | FREE |
Core Delivery charges apply only when all products in an order that have equivalents are accepted as such. If even one product cannot be substituted with an equivalent, the entire order will not qualify for Core Delivery charges.
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £150 | £50 ex. VAT |
| Between £150 - £400 ex. VAT | £35 ex. VAT |
| Over £400 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £25 ex. VAT |
| Between £100 - £250 ex. VAT | £20 ex. VAT |
| Over £250 ex. VAT | FREE |
| SuperFOIL and YBS products | |
| ORDER VALUE | DELIVERY CHARGE |
| Each item | £10 ex. VAT |
| Over £350 ex. VAT of 1 brand | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £7.50 ex. VAT |
| Over £100 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
- {{home}} Use in floors, framed walls and pitched roofs
- {{grade}} Aluminium composite facing on both sides
- {{thermostat}} 0.022 W/mK thermal conductivity
- {{build}} Easy to handle and install
- {{public}} Zero Ozone Depletion Potential (ODP)
- {{verified_user}} BBA certified
Technical Specification
| Material Type: | PIR |
|---|---|
| Thickness: | 50mm |
| Width: | 1200mm |
| Length: | 2400mm |
| Sales Unit: | Board |
| Sales Unit Coverage: | 2.88m2 |
| Brand: | Celotex |
| Manufacturer's Reference: | GA4050 |
| Weight: | 5.53kg |
| Thermal Conductivity: | 0.022W/mK |
Technical Downloads
About 50mm Celotex
- GA4050 is the thinnest board in the GA4000 range, offering high-performance PIR insulation in a compact 50mm profile.
- Designed for general applications (GA) - provides versatile insulation for walls, roofs, and floors.
- BBA-certified PIR insulation board.
- A smart choice for both residential and commercial projects where space is at a premium.
- Despite its slim profile, GA4050 delivers exceptional thermal efficiency with a thermal conductivity of just 0.022 W/m.K.
- Helps to meet UK Building Regulations without excessive insulation depth.
- Low-emissivity foil-facing enhances efficiency by reflecting radiant heat within sealed air spaces.
- Reduces heat loss and improves overall energy performance.
- Both lightweight and rigid - simplifies cutting, handling, and installation across various applications.
- Perfect for projects where every millimetre matters - delivering reliable insulation without compromising on space.
Applications
- Roofs
- Pitched Roof Insulation: Loft, Between Rafters, Between & Under Rafters, Between & Over Rafters, Pitched Roof Sarking.
- Flat Roof Insulation: Balconies & Terraces, Between & Under Joists.
- Walls
- External Wall Insulation: Timber Frame Walls.
- Floors
- Ground Floor Insulation: Beam & Block Floors, Concrete Slab Ground Floors, Upgrading Concrete Slab Floors, Suspended Timber Floors.
Benefits
- Excellent Thermal Performance - Thermal conductivity of 0.022 W/mK.
- Moisture Resistant - Prevents water absorption, maintaining thermal efficiency.
- Environmentally Responsible - Low Global Warming Potential (GWP) and Zero Ozone Depleting Potential (ODP).
- Cost-Effective - Offers high performance at a competitive price point.
- Non-Toxic - Safe to handle and install, with no harmful emissions.
- Low Emissivity Foil Facings - Improves thermal insulation performance within cavity air spaces.
Certifications
- Spread of Flame: Euroclass E Reaction to Fire classification, according to BS EN 13501-1.
- Thermal Conductivity of 0.022 W/m.K: Reduces the thickness of insulation required to hit the target U-value - BS EN 12667.
- Compressive Strength: ≥140kPa - BS EN 826.
- BRE Green Guide Rating of A for Sustainability: Assists in demonstrating environmental performance in BREEAM assessments.
- BBA Certified.
Installing GA4050
(Note: This is general advice. Always follow official Celotex installation guides and your project's specific requirements.)
- Cutting: Use a fine-toothed saw for clean cuts. Wear appropriate PPE (FFP3 mask, gloves, eye protection) due to dust.
- Fitting: Ensure boards fit tightly together and against framing. Gaps severely reduce insulation effectiveness.
- Joint Taping: Mandatory: Seal all board joints using aluminium foil tape for thermal continuity and surface vapour control.
- Fixing: Secure boards according to the application method specified in Celotex guidelines (e.g., using dedicated PIR insulation fixings, retention by framing/linings).
- Vapour Control Layer (VCL): While taped joints provide vapour resistance, UK regulations (Part L / BS 5250) often mandate a separate VCL membrane on the warm side (especially roofs/walls) to manage condensation risk. Verify your project's specific VCL needs.
Customer Reviews
Really easy to use
Most impressed with the service mainly. The board was as expected and does what it says on the tin.
Good price, cheapest I could find at the time
Excellent board and so light to handle
Used this on my walls and did the job
Used this in my shed and was easy to install
Perfect
Arrived on time for my builder, thanks
Great insulation for a competitive price
Excellent product. Also bought thicknesses ranging from 25mm to 150mm and all equal in quality. Such a good price too!
good product
Product was good and arrived on time
five stars
did a great job insulating
good insulation
Cheers
excellent for my new project
great product
best insulation around
did the job well
Leave a Review
Related Articles
How to Insulate Under Floorboards Without Removing
How To Install Celotex Insulation Boards
Celotex Floor Insulation Guide
