Order Helpline 01752 692 206

Celotex XR4165 General Purpose PIR Insulation Board - 2400 X 1200 X 165mm

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.

£108.32 Incl. VAT
Oops! Please select from the options


A highly versatile multi-purpose insulation board, Celotex XR4165 is suitable for multiple applications such as pitched, flat and solid floors, masonry walls and timber and steel framed systems. It consists of polyisocyanurate (PIR) and is convenient to handle, cut and shape. It can be fitted between rafters and joists to provide a highly insulating layer of insulation. These sturdy insulation boards deliver excellent thermal performance and have impressive thermal conductivity of 0.022 W/m.K, which allows them to easily meet the required U-value without being too thick.

But wait - there's more! Thanks to the low emissivity foil facing, thermal performance in sealed cavity air spaces is boosted, raising the potential U-value even further. These insulation boards are designed to Quality Management Standard ISO 9001:2015 and have a BBA (British Board of Agrement), giving you extra peace of mind. Last but not least, the XR165 has a BRE (Building Research Establishment) Green Guide Rating of A, which will help improve your environmental performance. All in all, this sturdy PIR insulation board will provide you with substantial long-term energy savings.

Features & Benefits: Celotex XR4165 General Purpose PIR Insulation Board - 2400 X 1200 X 165mm

  • Energy-saving PIR insulation board
  • High thermal performance
  • Quick & easy to install
  • Can be used in various roof, wall and floor applications
  • Low emissivity foil facings for improved thermal insulation performance in cavity air spaces
  • BBA certified
  • BRE Green Guide Rating of A

Product Specification

  • Length: 2400mm
  • Width: 1200mm
  • Thickness: 165mm
  • Coverage: 2.88m2
  • R-Value: 7.50m2K/W
  • Maximum weight: 6.69kg/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)140
  • 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 165mm Width 1200mm


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

Questions & Answers

There are currently no questions for this product.

Have a question about this product?


5 / 5 1 reviews
Craig Lochhead
3rd March
Good product
Sorry, there was a problem loading the reviews. Please try again.

Products We Recommend


Product Enquiry Form

Celotex XR4165 General Purpose PIR Insulation Board - 2400 X 1200 X 165mm

*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.