RCM Multipurpose  – A1 non-combustible, cellulose fibre cement board

RCM Multipurpose is a highly versatile cellulose fibre cement building board, offering excellent strength and weathering. 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.

  • Fire rated to EN 13501-1 class A1 non-combustible

Key Applications

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

Key Features

  • 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



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 polycrystalline diamond Dart Blade to avoid excessive wear on other blades. Alternatively, RCM offer a complete fabrication service, please contact our technical department for details or visit the fabrication and design page here.

Suitable for the Following Construction Types

  • Lightweight Steel Frame

  • Timber Frame

  • Modular / Offsite

  • Concrete Frame

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A building board with multiple uses

  • Multipurpose

    Lightweight Steel Frame

Technical Data

  • Nominal Density

    1375 kg/m3

  • Bending Strength

    ((Modulus of Rupture))

    937 N/mm2

  • Thermal Conductivity

    0.12 W/mk

  • Moisture Content


  • Reaction to Fire

    BS EN 13501-1 Class A1 Non Combustible

  • Biological Resistance

    Highly Resistant

  • Surface Condition

    Front Face - Smooth

    Back Face - Textured

  • Durability

    ((Life Expectancy - Minimum))

    30 years

  • Standard Board Sizes

    2400 x 1200mm

  • Thickness


    3.2 4.5 6 9 12

  • Nominal Mass of Product


    6.2 8.25 12.4 16.5

  • Dimensional Tolerance

    • Length


    • Width


    • Thickness


  • Product Testing and Certification

    • 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 1364-1

      BS EN1365-1

      BS EN ISO 1716:2018

      BS EN ISO 1182:2020

    • Physical Properties

      EN ISO 12467

      EN 594:2011 and BS 5268-6.1¹

  • Recommended Fixings

    • Steel Frame

      4.8mm x 38mm Wing tip self drilling fixing

    • Timber Frame

      4.2mm x 42mm Climaseal self drilling fixing

  • Further Information

    Soffit Strips Available


  • RCM Multipurpose can be used as a tile backer board.
  • RCM Multipurpose can be used in internal and external walling.
  • RCM Multipurpose can be used in Facia’s and soffit liner.
  • OEM applications for improved strength and density.

RCM Multipurpose has one smooth face and one textured face, the smooth face should be fixed outermost.

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

Yes, RCM Multipurpose can be left permanently exposed providing all board edges and penetrations are suitably sealed, we would suggest using a sealing coat to maintain long term appearance.

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

Yes, 12mm thick RCM Multipurpose can be used with RCM Renderflex.

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.

  • 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.
  • For fixing into SFS framing 4.8mm x 38mm self-drilling wingtip fixings suitably treated against corrosion should be used.
  • For fixing into Timber framing 4.2mm x 42mm self-drilling fixings suitably treated against corrosion should be used.

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

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Multipurpose Fact Sheet



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