Order Helpline 01752 692 206

Celotex TB4040 General Purpose PIR Insulation Board - 2400 X 1200 X 40mm

Product Code:
Est. Delivery: 3-5 Working Days
Shipping costs displayed in basket.
We can let you know when this product is back in stock.

This product is proving to be very popular and has unfortunately sold out.

Enter your email below and we'll notify you as soon as this product is back in stock:

Subject to stock availability, if products on a 24 hours service are ordered alongside products NOT on a 24 hours service, this may delay your whole order.

View Transport Policy

All delivery charges are included in the final shopping basket and are dependent on the products Scottish Highlands & the Islands where additional shipping charges will apply.

Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlands and Islands, a member of our helpline team will contact you prior to processing your order should an additional delivery charge apply.

While we make every effort to ensure orders are delivered by the date required, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules.

Any variation to web delivery date given will be advised to you by email or telephone. If we are unable to make delivery because access is not possible, we reserve the right to make a failed delivery charge.

£27.76 Incl. VAT
Oops! Please select from the options


A high-quality multi-purpose polyisocyanurate (PIR) insulation board with excellent thermal performance, Celotex TB4040 is quick and easy to install without any hassle. It's ideal for use in all sorts of floor, wall and roof applications. Thanks to the innovative low emissivity foil facing, this insulation board has an outstanding thermal conductivity of 0.022W/m.K. As a result, the insulation thickness necessary to meet the target U-value is reduced significantly, which saves you space. The high-performance facer also improves thermal performance in sealed cavity air spaces, boosting U-values even further.

It gets even better, as this versatile, thin PIR insulation board, available in a size of 2400mm in length by 1200mm in width by 40mm in thickness, is rigid and lightweight, making it easy to install in no time. It also has a BRE (Building Research Establishment) Green Guide Rating of A for sustainability and environmental friendliness. Last but not least, TB4040 is certified by the BBA (British Board of Agrement), so you know it has been designed to the highest industry standards and meets all relevant regulations.

Features & Benefits: Celotex TB4040 General Purpose PIR Insulation Board - 2400 X 1200 X 40mm

  • High-quality PIR insulation board
  • Excellent thermal performance & reduced thickness
  • Low emissivity foil facing
  • Can be used in floor, roof and wall applications
  • Lightweight, rigid and easy to install
  • BBA certified
  • BRE Green Guide Rating of A for sustainability

Product Specification

  • Length: 2400mm
  • Width: 1200mm
  • Thickness: 40mm
  • Coverage: 2.88m2
  • R-Value: 1.80m2K/W
  • Maximum weight: 1.41kg/m2
  • Thermal conductivity: 0.022W/m.K, according to BS EN 13165 for factory made rigid polyurethane foam (PU) product
  • Compressive strength (kPa): CS(10\Y)120
  • Spread of flame: Euroclass E Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.


Length 2400mm Thickness 40mm Width 1200mm


Thermal Conductivity 0.022 W/mK Edging Square Edge Facing Foil Product Type Board
Material PIR

Questions & Answers


I am looking for an insulation board that can be made into a box structure to fit over a storage battery in our garage. One side will be open to fit against a wall. A small tubular heater will be wired inside by an electrician. Any thoughts?


Rather than a rigid board, I'd strongly reccomend draping a form of insulative foil as this will be much more malleable to fit over rather than having to cut and amend a board and leave it exposed.


is this product ok for east facing inside shed wall and how do i fit to wall


You can use this product in an inside shed wall provided it is not exposed to the elements, although slabs might be a better option - please see the below guide for more info - https://www.insulationsuperstore.co.uk/help-and-advice/project-guides/insulation/insulating-a-shed/


Have a question about this product?


5 / 5 9 reviews
2nd January
As described
31st October 2020
Very good product
Christopher Brimson
15th October 2020
Good value
P wilkinson
12th August 2020
Great service, competitive prices, great product. Prompt delivery and good communication.
customer phil arkley
18th July 2020
So easy to use when I insulate summerhouses fits perfect
Mr Brian Fagg
2nd July 2020
A quality product at a competitive price.
8th April 2020
Good price. Does the job and just the size I needed
21st December 2019
Sorry, there was a problem loading the reviews. Please try again.

Products We Recommend


Product Enquiry Form

Celotex TB4040 General Purpose PIR Insulation Board - 2400 X 1200 X 40mm

*Required Field

Would you like to empty your basket?

Yes No


It seems you are running an older version of Internet Explorer. Our site does not support these old browsers as they do not house the technology that allows our site to be safe and secure.

If you wish to access our site please either upgrade your browser or download an alternative.