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A1 non-combustible, cellulose fibre cement board

RCM Multipurpose is a highly versatile cellulose fibre cement building board, offering excellent strength, weathering and acoustic properties. It is available as building boards and soffit strips.

With an A1 non-combustible classification Multipurpose offers the highest level of fire rated performance making it an excellent option for buildings over 18m.

Providing high levels of flexible strength, RCM Multipurpose allows design led visions to be delivered by providing a curvature building option.


  • Fire rated to EN 13501-1 class A1 non-combustible
  • Exceptional racking strength EN 594:2011
  • High impact resistance
  • BBA Approved
  • Excellent weathering properties
  • Wide range of thicknesses
  • Extensive range of applications
  • Range of soffit strips available
  • Integrates with other RCM products

Standard board sizes

2400 x 1200mm (6mm, 9mm and 12mm)

Other board sizes are available.

Soffit strips available in 1220 x 150 x 3.2mm, 1220 x 150 x 4.5mm and 2440 x 150 x 4.5mm.


If you would like a sample please click on the ‘add sample to basket’ button at the bottom right of this page and select your samples. Once selected you can add other products also, but please make sure you click on the sample basket at the top of the website to complete your request.


RCM Multipurpose can be cut, drilled and nailed with conventional woodworking tools.

For cutting the product in any volume, we recommend the use of an RCM poly crystalline diamond Dart Blade to avoid excessive wear on other blades. Alternatively, RCM offer a complete fabrication service, please contact our technical department for details.

Key applications

  • Internal and external walling
  • Flooring and ceilings
  • Facia’s and soffit liner
  • OEM applications for improved strength and density
  • Tile backer board
  • External cladding

Suitable for the following construction types

  • Lightweight Steel Frame
  • Timber Frame
  • Modular / Offsite
  • Concrete Frame

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Technical Data

  • 1380 kg/m3
  • 18 N/mm2
  • 9135 N/mm2
  • 0.17 W/mk
  • ≤8%
  • BS EN 13501-1 Class A1 Non Combustible
  • Highly Resistant
  • Front Face - Smooth
  • Back Face - Textured
  • 30 years
  • 2400 x 1200mm
  • 3.2 4.5 6 9 12
  • 4.2 6 8 12 16
    • Length
    • Width
    • Thickness
    • Fire Reaction Tests
      BS EN 13501-1 Class A1 Non-Combustible
    • Category 1 fire rated through wall solution to BS 476 part 21 and BS 476 part 22.
    • BS EN ISO 1716:2010
    • BS EN ISO 1182:2010
    • Physical Properties
      EN ISO 12467
    • EN 594:2011 and BS 5268-6.1¹
    • Steel Frame
      4.8mm x 38mm Wing tip self drilling fixing
    • Timber Frame
      4.2mm x 42mm Climaseal self drilling fixing


What applications can RCM Multi-Purpose be used in?

  • RCM Multi-purpose can be used in flooring and roofing applications.
  • RCM Multi-purpose can be used as a tile backer board.

Which way round should RCM Multi-purpose be fitted?

  • RCM Multi-purpose has one smooth face and one textured face, the smooth face should be fixed outermost.

What is the fire rating of RCM Multi-purpose?

  • RCM Multi-purpose has a rating of A1 to EN13501-1 this is a reaction to fire classification and should not be confused with fire resistance.

Can RCM Multi-purpose be used as a permanently exposed external board?

  • Yes, RCM Multipurpose can be left permanently exposed, we would suggest using a sealing coat to maintain long-term appearance.

Can RCM Multipurpose be used as a tile backer board?

  • Yes RCM Multipurpose can be used as a tile backer board.

Can RCM Multipurpose be used as a render carrier board?

  • Yes, 12mm thick RCM Multipurpose (referred to as Superflex) is referenced as a suitable render carrier board for the Kilwaughter K-rend system using their HPX and HPX 12 basecoats.

What are the fixing edge distance and maximum fixing centres for RCM Multipurpose?

  • RCM Multipurpose edge distance is 12mm except at the board corners where fixings should be moved up or down to achieve 50mm. Fixings should be fixed using a maximum 600mm x 300mm grid pattern.

How many fixings are required for RCM Multipurpose?

  • 27 No. fixings per 2400mm x 1200mm sheet when fixed in a vertical orientation.
  • 25 No. fixings per 2400mm x 1200mm sheet when fixed in a horizontal orientation.

What type of fixings should be used?

What blade is suitable for cutting RCM Multipurpose?

  • RCM can supply Poly Crystalline Diamond (PCD) blades suitable for cutting RCM Multi-purpose in a range of diameter and bore sizes, please contact RCM Technical department for further information.




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