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BBA Agrément Certificate
Certificate type
Calcium silicate fibre cement sheathing board.
Suitable for:
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 suitable for modular construction methods.
Features and benefits:
For use externally as a structural and non-structural sheathing board behind facade/rainscreen cladding applied to lightweight steel and timber frames, and also as an internal lining in domestic and non-domestic buildings.
Y-Wall is an integral element in a wide range of innovative certified facade solutions offered by the Benx Group. Further information can be found by visiting the Benx website at www.benx.co.uk.
Color | Yellow Grey |
FinishRCM Y-wall has one smooth face and one textured face, the smooth face should be fixed outermost. | Smooth Front face. Textured Back face. |
Material | Cement Mixture of cement, lime, calcium silicate and other additives. |
Shape | Rectangle Square |
Length | 1200 mm 2400 mm 2800 mm 3050 mm |
Width | 1200 mm |
Uniclass | |
CAWS | K11/485 Wall sheathing K11/60 Board K11/795 Wall lining on metal framing K11/845 Cement-bonded particleboard K11/890 Board |
Standard | To BS EN 12467. |
Fire rating | A1 in accordance with BS EN 13501-1: 2007.Behaviour in relation to fire: the board has a reaction to fire classification of A1 in accordance with BS EN 13501-1 : 2007. BS 476-4 non-combustible; one and two hour. |
Weather resistance | Manufacturer's standard.The design water vapour resistivity of Y-WALL board can be taken as 164 MN·s/g·m. Walls must have suitable weather protection on the outside, and a vented cavity. The product should be treated as conventional sheathing board with regard to detailing and damp-proofing at openings, eaves and sole plate, and the fixing of wall ties. Where required by design, the addition of a breather membrane must be in accordance with BS 5250 : 2011. |
Sheet size | - |
Nominal thickness | 6 mm.24 dB sound insulation. Nominal mass: 7.3 kg/m². 9 mm.29 dB sound insulation. Nominal mass: 11.1 kg/m². 12 mm.31 dB sound insulation. Nominal mass: 14.6 kg/m². 15 mm.Nominal mass: 18.2 kg/m². |
Length | 1200 mm.2400 mm.2800 mm.3050 mm.Special order.Non-standard. Consult manufacturer for details including minimum order quantity and lead time, and insert requirement. |
Width | 1200 mm.Special order.Non-standard. Consult manufacturer for details including minimum order quantity and lead time, and insert requirement. |
Edges | Manufacturer's standard. |
Colour | Yellow. |
Modulus of Rupture | 9–12 MPa. |
Accessories | None. RCM Foil Tape. Waterproofing seal. RCM Intusil. Neutral cure sealant for use in gaps and joints. RCM Joint Seal. Air tightness seal. RCM220 EPDM. |
Fixings | Recommended fixings: For fixing into SFS framing, 4.8 x 38 mm self-drilling wingtip fixings suitably treated against corrosion should be used. For fixing into timber framing, 4.2 x 42 mm self-drilling fixings suitably treated against corrosion should be used. RCM Y-WALL edge distance is 15 mm except at the board corners where fixings should be moved up or down to achieve 50 mm. Fixings should be fixed using a maximum 600 x 300 mm grid pattern. |
Third-party approval | BBA Certificate 14/5109. |
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