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Renderflex

High performance dimensionally stable render carrier board

RCM Renderflex is a high-performance cellulose fibre cement building board, offering excellent strength, weathering and stability properties when used in conjunction with polymer renders.

Renderflex has been specially formulated to achieve a strong key between polymer basecoats and top coats. The unique board structure offers a high tensile strength (ILB) essential for long term durability, whilst being developed to minimise board movement reducing any stress being applied to the render system.

Fire Rating
EN 13501-1 class A2-s1, d0
Standard Board Sizes
2400 x 1200mm (6mm, 9mm and 12mm)
BBA CERTIFICATION
Agrément Certificate 19/5708
SPECIFICATION WITH NBS

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Features

Fire rated to EN 13501-1 class A2-s1, d0
BBA approved
High dimensional stability
Excellent weathering properties prior to render application
High impact resistance
Maintains minimum board movement
Reduced stress on rendered finish
Integrates with other RCM products

Key applications

Render carrier board
For use with polymer renders
Internal and external applications
Fascia’s and soffit liner

Workability

RCM Renderflex can be drilled, screwed and nailed with conventional hand tools.

For cutting the product in any volume, we recommend the use of an RCM poly crystalline diamond Dart Blade to avoid excessive wear on other blades. Alternatively, RCM offer a complete fabrication service, please contact our technical department for details or visit our fabrication and design page here.

Suitable for the Following Construction Types

Lightweight Steel Frame
Timber Frame
Modular / Offsite

Technical Data

Nominal Density

1380 kg/m3
Bending Strength
((Modulus of Rupture))

17 N/mm2
Modulus of Elasticity (MoE)
((Oven Dry))

9210 N/mm2
Thermal Conductivity

0.12 W/mk
Moisture Content

8%
Reaction to Fire

BS EN 13501-1 Class A2 Limited Combustability
Biological Resistance

Highly Resistant
Surface Condition
- Front Face
  
  Smooth
- Back Face
  
  Textured
Durability
(Durability)

30 years
Standard Board Sizes
- Dimensions
  
  2400 x 1200mm
- Thickness
  
  6mm 9mnm 12mm
Nominal Mass of Product
((kg/m²))

8.3 12.4 16.6
Dimensional Tolerance
- Length
  
  +1/-2mm
- Width
  
  +1/-2mm
- Thickness
  
  ±10%
Product Testing and Certification
- Fire Reaction Tests
  
  BS EN 13501-1 Class A2 Limited combustibility
  
  BS EN ISO 1716:2010
  
  BS EN ISO 1182:2010
  
  BS EN 13823:2002
  
  BS 476 Parts 6 & 7
- Physical Properties
  
  BS EN ISO 12467:2012
Recommended Fixings
- Steel Frame
  
  4.8mm x 38mm Wing tip self drilling fixing
- Timber Frame
  
  4.2mm x 42mm Climaseal self drilling fixing

3rd Party Certifiction

FAQ's

What applications can RCM Renderflex be used in?

RCM Renderflex is used as a Render carrier board for most polymer modified thin coat render systems.

RCM Renderflex can be used as an exterior brick and stone slip carrier board.

Which way round should RCM Renderflex be fitted?

RCM Renderflex has one smooth face and one textured face, the smooth face should be fixed outermost.

What is the fire rating of RCM Renderflex?

RCM Renderflex has a rating of A2 to EN13501-1 this is a reaction to fire classification and should not be confused with fire resistance.

Can RCM Renderflex be used as a permanently exposed external board?

No, RCM Renderflex cannot be left permanently exposed.

What are the fixing edge distance and maximum fixing centres for RCM Renderflex?

RCM Renderflex edge distance is 12mm 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.

How many fixings are required for RCM Renderflex?

27 No. fixings per 2400mm x 1200mm sheet when fixed in a vertical orientation.
25 No. fixings per 2400mm x 1200mm sheet when fixed in a horizontal orientation.

What type of fixings should be used?

For fixing into SFS framing 4.8mm x 38mm self-drilling wingtip fixings suitably treated against corrosion should be used.
For fixing into Timber framing 4.2mm x 42mm self-drilling fixings suitably treated against corrosion should be used.

What blade is suitable for cutting RCM Renderflex?

RCM can supply Poly Crystalline Diamond (PCD) blades suitable for cutting RCM Renderflex in a range of diameter and bore sizes, please contact RCM Technical department for further information.