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Celotex CF5000 Full Fill Cavity Wall PIR Boards

Suitable for use in full fill cavity wall applications, BBA certified Celotex CF5000 makes use of the whole cavity width, optimising thermal performance through the wall achieving a lower U-value without having to widen the cavity.

Product Functions Celotex CW4000 installed in a partial fill cavity wall application

Specifically targeted at partial fill cavity wall applications Celotex CF5000 is a premium performance PIR solution, representing a pioneering advancement in PIR technology.

Certified under BBA certificate number 94/3080

Product Description

Celotex CF5000 PIR Insulation for Full Fill Cavity Walls, comprises foil-faced rigid polyisocyanurate (PIR) foam boards for use as full fill thermal insulation in new external masonry cavity walls up to 25 metres in height in domestic and non-domestic buildings.

With its low emissivity textured aluminium foil facings, CG5000 is manufactured from rigid polyisocyanurate (PIR) using blowing agents that have low global warming potential (GwP) and zero ozone depletion potential (zero odP)

Product Benefits

  • Celotex CF5000 features a super low lambda of 0.021W/mK helping you achieve compliance to UK Building Regulations and a U-value within the wall of 0.
  • Celotex CF5000 features a super low lambda of 0.021W/mK helping you achieve compliance to UK Building Regulations and a U-value within the wall of 0.18 W/m 2 K.
  • CF5000 has been mechanically engineered with a rebated edge to eliminate the passage of moisture.
  • Has a lower thermal conductivity value (0.021W/mK) compared with other typical PIR insulation boards providing enhanced thermal performance
  • BBA certified, Celotex CF5000 features a mechanically engineered edge profile, eliminating the passage of moisture and allowing you to focus on achieving enhanced building performance
  • Is certified under BBA certificate number 94/3080
  • Has a thermal conductivity of 0.021W/mK offering enhanced thermal performance and even better U-values
  • Achieves an A+ rating when compared to the BRE Green Guide
  • Has class O fire performance throughout the entire product
  • Makes installation easy with dimensions to fit with standard cavity wall tie spacing
  • Foil facings on either side make CF5000 easy to cut
  • Minimises heat loss through gaps with a mechanically engineered rebated edge

Product availability indicators

CF5000 - Price and Availability Advisory:

Presently there are no availability restrictions.

Excellent = Product Availability Excellent Good = Product Availability Good Fair = Product Availability Fair Poor =  Product Availability Poor Undetermined = Product Availability Undetermined
Availability relies on stock levels at closest depots and upon transport logistics to effect deliveries


Technical Data

Celotex CG5000 PIR Insulation Boards for Partial Fill Cavity Wall Applications

Product Code

Board dimensions

Thickness (mm)

λ Value (w/mK)

R-value (m²K/W)

U Value (W/m²K)

Weight (kg/m²)

5 Board Pack (kg)

Celotex CF5097 20 x (5 x 0.45 x 1.2) = 54.0m² 97 0.021 4.60 0.22 3.25 8.78

Thermal conductivity / Lambda value (W/mK) = 0.021 | Compressive strength (kPa) = ≥ 120 | Water vapour resistance (MNs/g) = > 150 | Please Note: R-Value = Thermal Resistance; U Value = Thermal Transmittance Co-efficient; Compressive strength = kiloPascals; Vapour resistance = MegaNewton seconds per gram.

Product Information and Certification

Links to manufacturer's information. Click to download in a separate browser window.


  • Celotex CW4000

    Celotex Cavity Wall boards are cut-down (0.45 x 1.2m) versions of the TB4000, GA4000 & XR4000 general application boards.

    View Full Detail

    Celotex Cavity Wall boards are cut-down versions of the  general application boards TB4000, GA4000 & XR4000
  • Celotex FR5000

    Celotex FR5000 is ideal for partial fill cavity wall that require the benefits of increased fire resistance protection

    View Full Detail

    Celotex FR5000 partial fill cavity wall offers increased fire resistance protection
  • Kingspan TW53

    Kingspan TW53 designed for wall insulation to be used behind traditional and lightweight polymer modified renders

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    Kingspan TW53 wall insulation behind traditional and lightweight polymer modified renders
  • Kingspan K12

    Kingspan Kooltherm K12 is a premium performance Phenolic Foam rigid insulation board designed wall framing systems

    View Full Detail

    Kingspan Kooltherm K12 premium performance Phenolic Foam rigid board for wall framing systems

Product Installation - Celotex CG5000

Please see installation information for the CW4000 Range - Click Here


Contact Manufacturer

Celotex Limited

Lady Lane Industrial Estate, Hadleigh, Ipswich, Suffolk, IP7 6BA

Celotex Technical Advisory Service.

Telephone: 0901 996 0100 (30p per minute) - Fax: 01473 820 889
Email: technical@celotex.co.uk
Web sites: Celotex Home Page / Celotex U-Value Calculator.

Contact us

Insulation Online Limited

27 Massetts Road, Horley, Surrey, RH6 7DQ, UK

Telephone: 0333 8000 828

Facsimile: 0333 7000 797

Email: enquiries@insulation-online.com

Web site: www.insulation-online.com

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