Don't worry, you can adjust your order via the cart page before checking out!
Checkout Secure
For quickest response email us at

Celotex GA4000 General Purpose PIR Insulation Board 1.2m x 2.4m - All Sizes

£9.95Ex. VAT.£11.94Inc. VAT.

Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Currently out of stock
Checkout Secure

Celotex GA4000 General Purpose PIR Insulation Board 1.2m x 2.4m - All Sizes

£9.95Ex. VAT.£11.94Inc. VAT.

+ Add To Cart

.. Visitors Right Now


Celotex GA4000 General Purpose PIR Insulation Board 1.2m x 2.4m - All Sizes

£9.95Ex. VAT.£11.94Inc. VAT.

12mm Celotex
Standard Order Delivery

Celotex is a multi-purpose insulation board that provides solutions to overcome cold spots in walls / floors / roofs / cavities etc that can be created from the lack of insulation in some areas. Featuring foil facings, this board has been manufactured from tough polyisocyanurate (PIR) by using a perfect mix of certain blowing agents which acquires zero ozone depletion potential (zero ODP) and a low global warming impact. In other words this product is easy on the environment.
High performance at no extra cost:
This high performing PIR insulation board is environmental-friendly. It certainly helps in reducing the excessive and unnecessary usage of energy and resources like central heating or in some cases air conditioning. It is designed to eliminate cold spots and has an excellent performance in timber frame and masonry walls. It features a thermal conductivity of 0.022W/mK for providing better insulation. 
Benefits and cost savings:
Celotex provides reliable and long-term energy saving solution for buildings, which ultimately results in low cost electricity and heating bills. It is suitable in numerous applications such as roof, floor and walls. It achieves the required U-values with minimum thickness. It also helps in meeting the current as well as future requirements of the Building Regulations. 
Celotex has achieved A+ rating when it is compared to BRE Green Guide and has certification from BBA certificate number 95/3197 and 09/4667. 
Key Features:

    1. Features a good reaction to fire when measured in accordance with new European standards
    2. Comes in conveniently sized boards for installation between cavity wall ties
    3. A very cost effective insulation
    4. Very strong product that will not break easily
    5. Easy to install and handle
    6. Keeps performing long after it is installed for many many years
    7. Lightweight product and easy to unload off a truck

Recent Name Change:

Recently Celotex boards went under strict review due to the Grenfell Tower incident. As a result most of the general application boards (GA4000 range) were down graded in their thermal performance from 0.022 to 0.023. As a result of this Celotex changed the names of the boards effected by this to TB3000 and GA3000 range.

This change as a result from the Grenfell Tower disaster has now been undone. Celotex and local government testing has done extensive testing on all the Celotex range and as a result the new Celotex TB4000 and GA4000 range meets the required standards to meet the Thermal Conductivity of 0.022.

Brand Celotex
Length 2400mm
Material type Polyiso
Thermal conductivity 0.022 W/mK
Thickness 12mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 90mm, 100mm, 120mm, 130mm, 140mm, 150mm, 165mm, 200mm
Width 1200mm
Delivery Info

Free Delivery T&C's

Free Delivery on all standard delivery orders when you spend over £300 ex. VAT.
This offer does not apply to special order items (read more below).

All orders under £300 ex. VAT incur a £25 ex. VAT delivery charge.


Build4Less go to great lengths to ensure each customer receives the lowest possible delivery charges for their purchase. We would like to give it to you free, and sometimes we can! However sometimes unfortunately we must charge for special order items to meet the additional charges imposed on us from various manufacturers.

Below you can view a list of all our Special Order delivery fees (excluding VAT)

Product Range Delivery Fee
Lead Flashing Rolls less than 100kg =£45 | between 101-499kg = £25 | above 499kg = FREE
EnviroBuild Furniture £125 per order. If your order of EnviroBuild Furniture exceeds £499 delivery is FREE
EnviroBuild (Other) £150 per order on EnviroBuild orders containing non furniture related products
ARC £35 per order
Ryno Orders under £300 incur an additional £20 delivery charge.
RynoTerrace Orders under £1000 incur an additional £75 delivery charge.
Clear Amber All Clear Amber products have a flat-rate £13.50 delivery charge
Clark-Drain less than 25kg = £35 | Over 25kg = £50 - Orders over 25kg only delivered to commercial properties
SISU Flooring £75 per order
Karma £50 per order
iKoustic £19.95 on orders under 20kg | £49 on orders under 200kg | £59 on orders under 900kg
H & H Acoustics £100 per order
Sheepwool £12 per pack
Building Blocks £25 delivery on orders under £200 | If order exceeds £200 delivery is FREE
Facing Bricks 1-4 bundles = £75 | 5-8 bundles = £150 | 9-12 bundles = £225 | 12+ bundles = Call to Inquire
Dalsan Skimcoat £50 per order


The vast majority of our orders are dispatched within 2-4 working days. However, more speciality items or ordered in items may take a little longer to dispatch. For more accurate delivery times please contact us.

Celotex Next Day Delivery

Build4Less now offers Next Day Delivery on Celotex TB4000, GA4000, and XR4000 to the greater London area (within the m25). Order before 3pm to avail of this offer.The "Celotex Next Day Delivery" option is only available upon checkout on orders consisting of Celotex products only.

What happens next?

Once your order has been placed we will notify you by email approximately 12 to 48 hours later with a delivery date for your order. For items that have a longer lead time than 2 - 4 working days your delivery date notification email may take longer than 12 to 48 hours. Orders are only processed for delivery between 8.00am and 5pm Monday to Friday excluding bank holidays. Build4less strongly advises not to book any tradesmen to do your work until after your material has been delivered to you, on rare occasions delays may happen that are out of our control which could result in a delay delivering material to site.

Please ensure there is a means of offloading your order on-site (unless otherwise agreed with Build4less). Always check your delivery is correct when it arrives before you unload and sign for your order.

For any further questions or queries please feel free to contact us on 0203 582 6399 or just email Our phone lines are open Monday - Friday from 8.30am to 5pm.


If you wish to check the delivery time of your order on the day of delivery please email and please provide your order number. One of our dispatch team will then give you an eta by email where possible as to when you can expect delivery. Please note this is just an eta only and is not an exact time of delivery as delays can occur from when an order leaves our warehouse to when it arrives with the customer. build4less will try to be as accurate as possible with given eta's.


Check the progress on your order by
Please note: Deliveries are made to the address supplied to us. If orders are returned to us by the carriage company we may make an additional delivery charge for re-dispatch.


All our orders are dispatched using a local delivery service, for remote regions within the mainland UK or special delivery requests your order maybe dispatched with a courier or haulage company with a tracking number. There may be an additional charge for this courier service but you will be notified before dispatch of this if you wish to proceed. Some remote areas in North/North West Scotland and West Wales may not be covered in our free delivery or standard lead time terms. If delivery is required to these areas or similar remote areas outside the reach of our distribution please contact us before ordering to confirm lead times and whether we can ship under standard rates.