140mm Celotex XR4140 PIR Insulation Board 2400mm x 1200mm

URN: 3001021
£56.20ex. VAT £19.51 per m2
£56.20ex. VAT
£19.51 per m2
Bulk Discount
10+ boards 20+ boards 30+ boards
£55.64ex. VAT £55.08ex. VAT £54.51ex. VAT
140mm Celotex XR4140 is a high-performance thermal insulation PIR board with composite foil facings. It can be used for roof, floor, wall and timber joist applications.

Nationwide Delivery

Fri 2 Jun

Product Overview

140mm Celotex XR4140 is a high-performance thermal insulation PIR board with composite foil facings. It can be used for roof, floor, wall and timber joist applications.

140mm Celotex XR4140 PIR Insulation Board 2400mm x 1200mm

URN: 3001021
£56.20ex. VAT

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.

Standard (Nationwide) Delivery

Insulation, Plasterboard and Drylining Products
Under £150 ex. VAT £75 ex. VAT
Between £150 - £300 ex. VAT £50 ex. VAT
Over £300 ex. VAT FREE
Timber & Sheet, Building Materials, Doors & Joinery and Gardens & Landscaping Products
Under £300 ex. VAT £25 ex. VAT
Over £300 ex. VAT FREE
Screws & Fixings and Adhesives & Sealants
Under £100 ex. VAT £7.50 ex. VAT
Over £100 ex. VAT FREE
SuperFOIL and YBS products
Each item £10 ex. VAT
Over £350 ex. VAT of 1 brand FREE

Express Delivery

Under £300 ex. VAT £75 ex. VAT
Over £300 ex. VAT £50 ex. VAT

This charge is based on delivery to mainland UK excluding the Scottish Highlands. If your delivery address is in the Scottish Highlands 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.

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We offer a 30 day returns policy on any faulty products.

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Key Features

  • Use in floors, framed walls and pitched roofs
  • Aluminium composite facing on both sides
  • 0.022 W/mK thermal conductivity
  • Easy to handle and install
  • Zero Ozone Depletion Potential (ODP)
  • BBA certified

Technical Specification

Technical Specification
Material Type:PIR
Sales Unit:Board
Sales Unit Coverage:2.88m2
Manufacturer's Reference:XR4140
Thermal Conductivity:0.022W/mK

What Is 140mm Celotex XR4140?

Properly insulating your home is one of the best ways to improve its longevity and value whilst reducing your energy bills. 

When it comes to effective thermal insulation, look no further than Celotex Insulation XR4140; the 'XR' of which means 'Extra Resistance'. 

With low emissivity foil facings, the 2.4m x 1.2m boards are manufactured from rigid polyisocyanurate (PIR) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and low global warming potential (GWP), meaning they're as gentle on the environment as they are tough on cold spots.

With a low thermal conductivity of just 0.022 W/m.K, Celotex XR4140 delivers optimum thermal performance and prevents heat loss with minimal thickness whilst meeting the current and future requirements of the Building Regulations. Celotex XR4140 is suitable for use in a number of applications including roof, wall and floor systems. 

140mm Celotex XR4140 PIR Applications

140mm Celotex XR4140 is suitable for ‘cut-to-fit- applications between joists and rafters and enables users to achieve lower U-values with just a single layer of insulation. 

Celotex XR4140 is a highly versatile multi-purpose insulation board ideal for various applications including pitched roofs, solid floors, solid masonry walls, timber frames and steel frames. 

The XR4140 is produced to the highest manufacturing standards and has a BBA (British Board of Agrement) certificate as fit for use in defined solid roof, wall and floor applications.

Celotex XR4140 insulation board is suitable for use in the following applications:

  • Solid concrete floors
  • Block and beam floors
  • Suspended timber joist floors
  • Pitched roofs
  • Partition and solid masonry walls
  • Timber framed & steel framed systems

140mm Celotex XR4140 PIR Specifications

With an impressive thermal conductivity of 0.022 W/mK, 140mm Celotex boards are the go-to thermal insulation solution for those looking to improve heat retention in their homes whilst making long term energy savings. 

They are manufactured with eco-friendly concepts in mind, using a blowing agent with low global warming impact and zero ODP (zero ozone depletion potential). 

Let's take a look at the specs: 

  • Thermal conductivity of 0.022 W/mK
  • Achieves U-values with minimum thickness
  • Moisture-resistant
  • Low Global Warming Potential (GWP) and Zero Ozone Depleting Potential (ODP)
  • Features low emissivity foil facings giving improved thermal insulation performance within cavity air spaces
  • Easy to cut and shape
  • Provides reliable long-term energy savings for buildings

Celotex XR4140 PIR Insulation Board Certifications

BS EN is British and European Standard Specifications. With over 100 years of experience, the British Standards Institute is recognised as the UK’s National standards body. BS EN considers Celotex XR4140:

  • Spread of flame: Euroclass E Reaction to Fire classification, according to BS EN 13501-1
  • Thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value - BS EN 12667
  • BRE Green Guide Rating of A for sustainability - which can assist in demonstrating environmental performance in your BREEAM assessments
  • BBA certified

140mm Celotex Insulation Storage & Handling

Celotex XR4000 PIR insulation boards are lightweight and easy to handle. If you need to store 140mm Celotex boards for a while before installation, we recommend choosing a cool, dry space. 2.4m x 1.2m insulation boards are not for external use, and therefore they should not be left outside for extended periods of time or allowed to get wet.

About Celotex

Celotex is a leading British manufacturer of 140mm PIR insulation. It was founded decades ago and has since evolved from a fibreboard insulation company to one that focuses on PIR boards. The XR4140 insulation board is just one of many popular thermal insulation solutions from Celotex XR4000 product range, with thicknesses ranging from 110mm to 150mm.

They are manufactured in accordance with quality management systems and are water vapour resistant. Celotex insulation boards help to achieve lower U-Values, energy use and carbon dioxide emissions targets set by the national building regulations.


5/5 based on 1 review

Wasn't sure if Materials Market could guarantee availability of 110 boards, but they proved me wrong! Got everything delivered in 3 days which was the date required. Will definitely be back for current and future requirements.

Andrew Parsons on

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