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RCM Y-Wall A1 Fire Rated Fibre Cement Building Board – 2400mm x 1200mm x 12mm



RCM Y-wall is a high-quality flexible calcium silicate based fibre cement 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 facade solutions, as well in ceilings offering a non-combustible classification.

Y-wall is ideal for modular construction methods.

Key Features:
  • Thickness: 12mm
  • Board Size: 2400mm x 1200mm
  • Colour: Natural Grey
  • Fire Rated: EN 13501-1 class A1
  • Uses: A1 Fire rated sheathing board for Ceilings, Partition walling & OEM applications for improved strength and density
  • Construction Types: Lightweight Steel Frame, Timber Frame, Modula Offsite

Additional information


Technical Data:
  • Nominal Density: 1200 kg/m3
  • Bending Strength (Modulus of Rupture):  12 N/mm2
  • Modulus of Elasticity (MoE):  4000 N/mm2
  • Thermal Conductivity:  0.30 W/mk
  • Moisture Content:  9% ±3%
  • Reaction to Fire:  BS EN 13501-1 Class A1 Non-Combustible
  • Biological Resistance:  Highly Resistant
  • Surface Condition:  Front Face – Smooth & Back Face – Smooth


Technical Datasheet


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