Y-wall is a flexible cement/calcium building board, for applications that require a slightly lighter board with improved fire properties.

As a sheathing board, it can be used behind rain screen cladding, insulated facades cedar cladding to name but a few applications. In this application, it would be recommended to use a water resistant/ breathable membrane such as Tyvek, on to the face of the board, in line with good building practices for external cladding.

The product offers very similar properties to that of cement particle board, but due to the calcium additives, it has much greater fire resistance properties. This is to meet the ever more stringent demand from specifiers, clients and insurers in the market place.

RCM Y-wall is manufactured from a mixture of cement, lime, calcium silicate and other additives. Y-wall is resistant to the general effects of moisture, humidity changes, rot, insects, vermin and is non-combustible and has excellent fire related properties (60 and 90 minutes firewall when used in through wall application).

Y-wall building Board Main Applications include Partitions, Sheathing board and OEM uses.

Board Dimensions


  • 2400 x 1200mm


  • 6, 9 & 12mm


  • Front: Smooth
  • Back: Textured

Main Advantages

  • Resistant to moisture
  • Non-combustible
  • Excellent fire related properties
  • Resistant to humidity changes
  • Maintenance free
  • Can be drilled
  • Resistant to rot, insects & vermin
  • Cost effective
  • Easy to work

Colour Specifications & Brochures

PDFDOWNLOAD DOCUMENTY-Wall Technical Datasheet

    Enquire about this product

    For more information or to request a brochure please complete the form below. Fields marked * are required.

    Your Details:

    • Vivalda Group needs the contact information you provide to us to contact you about our products and services. You may unsubscribe from these communications at any time. For information on how to unsubscribe, as well as our privacy practices and commitment to protecting your privacy, please review our Privacy Policy.