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Celotex RS5000 Rain-screen Cladding Boards

Specialist Celotex Product, available in most thickness’s from the manufacturers, short lead-times apply to the following products FR5025, FR5040, FR5050, FR5060, FR5070, FR5075, FR5080, FR5090, FR5100, FR5120 and FR5150

Product Functions Celotex RS5000 installed in a rainscreen wall cladding 

Rainscreen Cladding product suitable for use in warm steel frame constructions for ventilated facade applications, Celotex RS5000 can be used in buildings above 18 metres in height – a first for PIR insulation.

Relevant for both new build and refurbishment projects, rainscreen cladding is a popular choice for large multi-storey buildings; however structural performance, wind loading, fire performance and thermal efficiency are all considerations for the building designer.

Constructions designed with high levels of insulation benefit from reduced running costs and lower levels of carbon emissions


Product Description

RS5000 is lightweight, durable and available in a huge range of materials, ventilated façade systems allow buildings to achieve their aesthetic goals whilst utilising practical construction methods

Specifically designed for Rainscreen cladding applications, Celotex RS5000 meets the performance criteria in BR 135 and therefore is suitable for buildings above 18m

With low emissivity textured aluminium foil facings, Celotex RS5000 comprises rigid polyisocyanurate foam core (PIR) using a blowing agent that has low global warming potential (GWP) and zero ozone depletion potential (ODP).

Suitable for use in warm steel frame constructions or fixed directly to masonry for over cladding applications, Celotex has a rainscreen cladding solution that is successfully tested to BS 8414-2:2005, meets the requirements in BR 135.

Product Benefits

Celotex RS5000 is a premium performance rainscreen cladding PIR insulation board that:

Comprises a polyisocyanurate (PIR) rigid foam insulation core featuring Celotex IQ providing super low emissivity textured aluminium foil facings on both sides and Class O fire performance throughout the product in accordance with BS 476.

Has been tested to BS 8414-2:2005, meets the requirements in BR 135 and the first PIR insulation suitable for rainscreen cladding applications above 18 metres in height

Features Class O fire performance

Has a super low lambda value of 0.021 W/mK

Is designed to enhance the thermal performance of insulated façade systems

Can be used as sheathing to warm steel frame constructions or fixed directly to masonry for over-cladding applications

RS5000 also features an A+ rating when compared to the BRE Green Guide delivering over 20% better environmental impact than typical PIR,  and is CFC/HCFC free with low GWP and zero ODP.

RS5000 is manufactured in accordance with quality management systems ISO 9001 and environmental management system ISO 14001.

All products must be installed in accordance with instructions issued by Celotex.

Product availability indicators

RS5000 - 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 RS5000 PIR Insulation Boards for applications that require improved fire resistance

Product Code

Board dimensions

Thickness (mm)

λ Value (w/mK)

R-value (m²K/W)

U Value (W/m²K)

Weight (kg/m²)

Gross weight (kg)

Celotex RS5050 8 x 1.2 x 2.4 = 23.04² 50 0.021 2.35 0.43 1.81 41.70
Celotex RS5060 7 x 1.2 x 2.4m = 20.16m² 60 0.021 2.85 0.35 2.16 35.55
Celotex RS5080 6 x 1.2 x 2.4 = 17.28m² 80 0.021 3.8 0.26 2.80 48.38
Celotex RS5100 12 x 1.2 x 2.4 = 34.56m² 100 0.021 4.75 0.21 3.38 116.81

Thermal conductivity / Lambda value (W/mK) = 0.021 | Compressive strength (kPa) = ≥ 120 | Water vapour resistance (MNs/g) = > 150 | Fire performance Class O in accordance with BS 476 Parts 6 & 7 |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 FR5000 Datasheet | Celotex Handy Guide 


CG5000 Range - Certification

Celotex RS5000 is a premium performance solution and is the first PIR board to successfully meet the performance criteria set out in BR 135 for rainscreen cladding systems.

    The system tested was as follows:

      12mm Fibre Cement Panels
      Supporting aluminium brackets and vertical rails
      100mm Celotex RS5000
      12mm Non-combustible sheathing board
      100mm SFS System
      2 x 12.5mm plasterboard The fire performance and classification report issued only relates to the components detailed above.
      Any changes to the components listed will need to be considered by the building designer.

  • GA4000 and XR4000

    Celotex general application boards can be used in buildings that do not require additional fire resistance protection

    View Full Detail

    Celotex GA4000 & XR41000 used as rainscreen in buildings requiring no additional fire resistance protection
  • Celotex FR5000

    Celotex FR5000 rainscreen boards can be used in buildings below 18 meters that require increased fire resistance protection

    View Full Detail

    Celotex FR5000 partial fill cavity wall offers increased fire resistance protection
  • Kingspan K15

    Kingspan K15 foil faced rainscreen boards for insulating behind cladding systems using proprietary fixing rails

    View Full Detail

    Kingspan K15 foil faced rainscreen boards behind cladding systems using fixing rails
  • Kingspan K5 EWB

    K5 can be mechanically fixed to masonry or timber frame walls behind traditional or light-weight polymer render systems.

    View Full Detail

    Kingspan K5 mechanically fixed to external walls behind polymer render systems.

Product Installation - Celotex RS5000

Awaiting installation information from manufacturer

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
Web sites: Celotex Home Page / Celotex U-Value Calculator.

Contact us

Insulation Online Limited

Sales Office only:39 Normandy Road, Worthing, West Sussex, BN14 7DX, UK

Telephone: 0333 8000 828


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