Fire classification to EN 13501-1 class A1
2400 x 1200mm (6mm, 9mm, 12mm and 15mm) Other board sizes are available
RCM Y-wall can be cut, drilled and nailed using conventional hand tools; offering many of the properties of 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 as an external sheathing board on structures including where a fire rating is required including those greater than 18m in height, where a structure is over 18m in height RCM Y-wall should be used from ground level all the way up the structure.
RCM Y-wall is classified as A1 non-combustible.
No, RCM Y-wall cannot be left permanently exposed.
RCM Y-wall has one smooth face and one textured face, the smooth face should be fixed outermost.
RCM Dafa tape should be applied to all board to board joints as soon as possible after fixing the boards, unless an airtight seal is required to the external face of the sheathing board, for an airtight seal then the RCM Joint Seal system should be used.
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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