Fire classification to EN 13501-1 class A1
2400 x 1200mm (6mm, 9mm, 12mm and 15mm) Other board sizes are available
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.
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1200 kg/m3
9-12 MPa
4000 N/mm2
≤0.23 W/mk
≤9%
BS EN 13501-1 Class A1 Non-Combustible
Highly Resistant
Front Face - Smooth
Back Face - Textured
30 years
2400 x 1200mm
6, 9, 12, 15
7.2, 10.8, 14.4, 18
±3mm
±3mm
±0.5mm
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
BS EN ISO 12467
BS EN 594 Category 1
BS EN 594:2011
FIX006 - 4.8mm x 38mm Wing tip self drilling fixing
FIX005 - 4.2mm x 42mm Climaseal self drilling fixing
RCM Y-wall can be used in applications that require a fire resistance sheathing board, i.e. EWI and rainscreen applications. Buildings in Scotland above 11m require Y-wall from the ground up. Buildings above 18m require Y-wall from the ground up. Y-wall is not a fire protection board.
RCM Y-wall is classified as A1 non-combustible.
No, RCM Y-wall cannot be left permanently exposed. However, a similar board that can be left exposed is that of Cladcolour board
RCM Y-wall has one smooth face and one textured face, the smooth face should be fixed outermost, this provides a smooth face for finishes. However since the board is fully through either side can by used. (See technical guidance note)
Fire Protection
To achieve an EI fire rating, Nullifire 703 must be used to seal any gaps or open joints, including 2mm to 5mm joints in open jointed sheathing boards such as Y-wall.
Weathering Protection
Exposure for up to 6 Months:
b) Exposure for up to 12 Months:
Airtightness Requirements
Summary of Component Parts
If the joints are taped as soon as the boards are fitted they can be left exposed during the construction phase for up to 3 months, for up to 12 months temporary exposure we highly recommend using the RCM Joint Seal Kit.
RCM Y-wall edge distance is 12-15mm 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.
We have done our own in-house testing for 12mm RCM Y-wall. The results suggest a radius of 7.5m or greater, however a structural engineer should ratify this for your project. RCM Y-wall should not be fixed to a radius but should be cut into vertical strips and fixed to form the curve from a series of flat panels.
RCM can supply Poly Crystalline Diamond (PCD) blades suitable for cutting RCM Y-wall in a range of diameter and bore sizes, please contact RCM Technical department for further information.
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