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| Introduction | Description | Surface Textures | Colors | Sizes | Manufacturing Tolerances | Performance | Specific Properties | Typical Fixing Methods | Application | Construction Details | Health & Safety




WeatherPlank Siding products are made of autoclaved fibre cement reinforced calcium silicate boards that are 100% free from asbestos or sepiolite. Since WeatherPlank is laminated of specially formulated calcium silicate mixtures and selected fibres to form the designated thickness, unlike other siding boards made of vinyl or timber materials,
maintenance cost of WeatherPlank is low. It is robust, impact resistant, moisture resistant and non-combustible. It is designed for use in direct weathering applications when used in conjunction with external grade textured finishes and other surface coatings or internal decorated applications. It can hold paint finishes 3-4 times longer than other siding board materials do. It has high water vapour permeability which helps eliminate condensation or water trapped behind the boards. Available products include WeatherPlank Siding, WeatherTrim and WeatherPlank Panel.
WeatherPlank Siding Products are ISO9001:2000 (Certificate of Conformity of Quality Management System Certification) and ISO14001:1996 (Environmental Management System Certificate) certified and have obtained Green Product Label Award issued by National Environment Protection Bureau.





WeatherPlank is made of WeatherPro®-L fibre cement reinforced calcium silicate board, which is produced from a mixture of cement, silica, special cellulose fibres and selected fillers to impart durability, toughness and moisture resistance. It is then cured by an autoclaving process whereby the ingredients are reacted together under the effects of super-heated steam and high pressure. The synthetic cement silicate binder provides exceptional dimensional stability and an unrivalled resistance to movement due to effects of moisture or heat. WeatherPlank will not rot or support fungal growth and is unaffected by sunlight or steam. It does not contain any soluble ingredients or free alkali which could be dissolved by moisture or condensation causing unsightly marks. If exposed to moisture, WeatherPlank will completely recover on drying out naturally, with no permanent loss of strength. It will not degrade with time and within normal applications, the life of the product is limited only by the durability of the supporting structure and materials used in fastening.


Surface Textures 


WeatherPlank is easy to cut on site with standard wood working tools. Where seamless finishes are required, it can be finished with thin coat polymeric renders or other surface coatings to give a seamless finish. Standard WeatherPlank is off-white in colour and has a high quality embossed wood-like, wood grain smooth or traditional smooth surface textures.

Surface textures WeatherPlank Siding WeatherTrim WeatherPlan Panel
Embossed wood-like -
Wood grain smooth
Traditional Smoonth





Standard WeatherPlank comes with un-decorated off-white natural finish. Pre-primed WeatherPlank is available. For pre-primed WeatherPlank, the primed coat is on the front face only. This reduces water uptake and enhances compatibility with the coating system. However, coating manufacturers’ recommendations must be followed.




WeatherPlank Siding
WeatherPlank Siding is pre-cut in size for applications on planking, facades and shop fronts.


WeatherTrim is pre-cut in size. It provides unmatched durability at corners, windows, columns and friezes.

WeatherPlank Panel
WeatherPlank Panel is produced in full-sized standard board for wall paneling decoration. It can easily be cut on site to match various architectural features.

Sizes WeatherPlank Siding WeatherTrim WeatherPlan Panel
Thickness 7.5 / 9mm 12mm 9 / 12mm
Width 190 / 260mm 100mm 1200 / 1220mm
Length 3000mm 2400 / 2440mm 3000mm
Note: Other colours, textures or sizes are also available and can be produced to special order.



Manufacturing  Tolerances 


Length tolerance +/- 5mm
Width tolerance +/- 2mm
Thickness tolerance +/- 0.3mm
Diagonal tolerance +/- 5mm

Note: Account for full-sized panels






1300 kg/m3 +/-5%

Surface alkalinity pH 7-10

Flexural strength (along grain)

10.50 MPa

Flexural strength (across grain)

13.80 MPa

Moisture movement (ambient to saturated)

0.5 mm/m

Moisture content

Ex works - 15%
In situ - 5%

Thermal conductivity

0.20 W/mK

Resistance to continuous heating



BS 476: Part 4: 1970
BS EN ISO 1182: 2002
GB8624-1997, Grade A

Heat of combustion

BS EN ISO 1716: 2002

Building regulations classification

Euro Class A1


ASTM C1185:2003

Freezing and thawing test

No alteration nor de-lamination
after 25cycles of freezing/thawing

Minimum Bending Radius (along grain)

5600mm for 7.5mm
6600mm for 9mm
8800mm for 12mm



Specific  Properties 

Bent to shape Good chemical resistance
Decorative finishes by paint or tiles Impact resistance
Economical Lightweight but strong
Easy to use Maintenance friendly
Excellent dimensional stability Non-combustible
BS476: Part4
BS EN ISO 1182
Frost resistance Rot proof, anti-bacterial, resistant to insects and mould growth
Sound-proof Weather-proof


Typical Fixing  Methods 






WeatherPlank can be used in a wide variety of building applications because of its easy working, fixing and decorating characteristics. It can also be used at curved section. Typical applications include:

  • Lap siding for façade and shop front
  • Decorative curved façade
  • Internal and external wall paneling
  • Decorative featured wall panel
  • Wet area lining
  • Eaves and ceiling soffit lining


Health & Safety 


WeatherPlank is formulated without asbestos, sepiolite or any inorganic fibres. When using power saws or sanders in a confined space, dust extraction equipment is recommended to control dust levels. WeatherPlank is designed for non-load bearing construction. Horizontal planking or panels must not be walked on as they are not designed to take additional loads between supports; if there is a risk of this occurring, warning notices should be displayed. Fixers must ensure that they work from adequate and safe platforms where necessary.

Note: All physical performance values of products depicted in this catalogue are averages based on the standard production. The figures may be changed dependent on the test method used.

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