WeatherKem Calcium Silicate Fibre Cement Board



Calcium Silicate Fibre Cement Board – WeatherKem 

BBA-certified A1 non-combustible Category A weather-proof rated building board for interior and exterior applications

BBA certified WeatherKem is a non-combustible calcium silicate fibre cement board, combining weather, moisture and fire resistance properties with high impact strength and sound insulation. It is rated as a Category A board to BS EN 12467:2012+A2 2018 for applications where they may be subjected to heat, high moisture and severe frost.

It is primarily used as an external sheathing board on both metal and timber structures of all types of façade solutions, including; residential, commercial and industrial buildings, as well as, schools and hospitals. It is especially suited to projects where quick construction, safety, cleanliness and hygiene are of high importance and is also ideal for use in interior areas of high humidity, like swimming pools, spas and wet rooms.

WeatherKem Fibre Cement Board is designed specifically to meet the complex and stringent requirements of the building and construction industry, providing architects, developers, and contractors with adaptability and performance benefits to enable safe and innovative designs to be easily realised.

You can specify WeatherKem Fibre Cement Board with confidence.

Find this product on NBS Source.

What sizes of Fibre Cement Board are available?

6mm x 1200 x 2400mm
828 boards per container

9mm x 1200 x 2400mm
550 boards per container

12mm x 1200 x 2400mm
414 boards per container

15mm x 1200 x 2400mm
320 boards per container

18mm x 1200 x 2400mm
280 boards per container

Fibre Cement Board


  • Cladding
  • Paneling
  • Decorative walling
  • Roof lining
  • Curtain walls
  • External boarding


  • False ceilings
  • Partitions
  • Mezzanines
  • Wet indoor environments
  • Flooring
  • Hospitality and conference facilities
  • Retail and shopping malls
  • Commercial buildings
  • Education
  • Healthcare and leisure
  • Restaurants and hotels
  • Public utilities
  • Call centres
  • IT centres
  • Residential properties

Do you have a current Weather Protection Board project?

Contact us to discuss:
UK: +44 (0) 333 344 0699
Ireland: +353 (0) 1 565 3756




Fire Resistance

Tested in accordance with BS 476 parts 6 & 7 classified as Class 0 building board with Class 1 surface spread of flame. The boards can be used for the construction of fire-resistant building elements to satisfy the criteria of BS 476: Part 22: 1987 Method for Determination of the Fire Resistance of non-load-bearing Elements of Construction – Determination of the Fire Resistance of Partitions, to achieve EI 60 and EI 120.

Weather Resistant

With cement constituting a large percentage of its composition, Kemwell boards offer excellent resistance to the harmful effects of the weather. It is rated as a Category A board to BS EN 12467:2012+A2 2018 for applications where they may be subjected to heat, high moisture and severe frost.

Vermin Resistant

Fibre cement board is resistant to termite and vermin attack and prevents fungus growth.

Acoustic Insulation

Airborne sound reduction varies between 26 and 44 dB according to thickness of the panel and mineral wool usage.

Chemical Stability

WeatherKem is a chemically stable building material which retains its strength over time.

The board is unaffected by many diluted chemicals such as brines, bleaches, detergents and chlorine solutions.

Dimensional Stability

Boards provide excellent dimensional stability in variable ambient temperatures and in humid conditions, ensuring a high level of protection from impact and the elements is maintained allowing the board to perform under difficult conditions.

WeatherKem has the strength of brick and block with the benefits of a dry panel system.

Easy Workability

WeatherKem board with its wood-like properties can be drilled, sawn and sanded with normal woodworking tools. The board can be fixed using screws and nails, pre-drilling a hole slightly bigger than the shank. As well as being easy to install, it can also be shaped during installation.

Smooth Surface

WeatherKem board is light grey in colour with a smooth finish; it can be decorated with minimum preparation. The panels can be finished with laminates, foils, paints and renders using alkaline resisting adhesives, primers and coatings. Painting provides a weather seal. Please contact Kemwell Facades for further information on the type of renders and paints which can be used with this board.


WeatherKem has a minimum expected service life of 30 years.

Call Us

UK: +44 (0) 333 344 0699
Ireland: +353 (0) 1 565 3756