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    Y-Wall

    y-wall sheathing board

    A1 non-combustible, BBA certified calcium silicate cement building board

    RCM Y-wall is a high-quality flexible calcium silicate cement based building board, perfect for use as a fire rated sheathing board.  Offering excellent fire properties as well as high levels of dimensional stability, Y-wall is an exceptional board for use in multiple applications.

    Y-wall is used primarily as a fire rated sheathing board or building board. Used extensively on both steel frame and timber frame structures, Y-wall is used behind all types of façade solutions.

    • Fire classification to EN 13501-1 class A1

    • Agrément Certificate 14/5109

    • 2400 x 1200mm (6mm, 9mm, 12mm and 15mm) Other board sizes are available

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    Key Applications

    • Fire rated sheathing board
    • OEM applications for improved strength and density
    • Recommended for buildings above 18m
    • Suitable for rainscreen cladding 
    • Suitable for EWI systems 

    Features

    • Fire classification to EN 13501-1 class A1
    • BBA approved
    • Flexible and strong
    • Excellent water resistance
    • Easy to use
    • High levels of dimensional stability
    • Integrates with Benx systems

    Workability

    Y-wall can be cut drilled and nailed using conventional hand tools, therefore making many opportunities for application with timber.

    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, find out more.

    Suitable for the Following Construction Types

    • Lightweight Steel Frame

    • Timber Frame

    Technical Request Form

    For Technical Service or Product Support please file a technical request using our support form or contact your local representative.

    Technical Request Form

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    Y-wall as part of a system build-up

    • Steel Frame

    Technical Data

    • Nominal Density

      1200 kg/m3

    • Bending Strength

      ((Modulus of Rupture))

      9-12 MPa

    • Modulus of Elasticity

      ((MoE))

      4000 N/mm2

    • Thermal Conductivity

      ≤0.23 W/mk

    • Moisture Content

      ≤9%

    • 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

      ((mm))

      6, 9, 12, 15

    • Nominal Mass of Product

      ((kg/m²))

      7.2, 10.8, 14.4, 18

    • Dimensional Tolerance

      • Length

        ±3mm

      • Width

        ±3mm

      • Thickness

        ±0.5mm

    • Product Testing and Certification

      • Fire Reaction Tests

        BS EN 13501-1:2018 Class A1

        BS EN ISO 1716:2018

        BS EN ISO 1182:2020

        BS EN 1363-1

        BS EN 1364-1

        BS EN 1365-1

        BS 476 Part 4

        BS 476 part 22 fire rated through wall solutions

      • Physical Properties

        BS EN ISO 12467

        BS EN 594 Category 1

        BS EN 594:2011

    • Recommended Fixing

      • Steel Frame

        FIX006 - 4.8mm x 38mm Wing tip self drilling fixing

      • Timber Frame

        FIX005 - 4.2mm x 42mm Climaseal self drilling fixing

    Riverlight Case Study

    London

    During the early 19th Century, a large section of the South Bank of the River Thames, London, comprised small wharves, docks and other industrial uses. In more recent years, the site has been used as a...

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    Y-wall Case Studies

    • Queensbridge Quarter

      Queensbridge Quarter, London North

      Queensbridge Quarter sits within a dense North London setting, where ageing building stock and rising...

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    • Aurora Apartments

      Aberdeen, Scotland

      Challenge: The Aurora Apartments were one of several ‘high priority buildings in Scotland to be included...

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    • Timber Innovations Case Study

      West Midlands

      Collaborative Success in Achieving Enhanced Fire Performance with Y-Wall and Timber Innovations’...

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    • Kent Steet Baths

      Birmingham

      Kent Street is a new development of 504 new homes for Lupa Land in the heart of Birmingham. The site...

      View project
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    Download the Y-wall Fact Sheet

    Find out about Y-wall, a high-quality flexible calcium silicate based fibre cement building board, perfect for use as an A1 fire rated sheathing board.

    Download Fact Sheet

    Y-wall Technical Information

    RECOMMENDED COMPONENTS AND ACCESSORIES

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    Y-wall Videos

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