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‘Specifying systems with a credible certification provides reassurance and confidence to specifiers’
Behaviour in relation to fire
The building regulations for England and Wales set out the legal obligations for building designers. These functional requirements outline what must be done, but do not address how to achieve this. An example of a functional requirement that covers structural stability in a fire is that ‘the building shall be designed and constructed so that, in the event of a fire, its stability will be maintained for a reasonable period.’ Companies with recognised certified products generally
make technical information readily available and the material safety data sheet for building boards and external cladding systems is a good starting point. Fire Rating A1 and A2 refers to reaction-to-fire classifications
Resistance to moisture and durability
By specifying a building board that is fully tested to BS EN 1062-1, it ensures the boards have adequate moisture resistance and durability and will have a life equal to that of the building. Selecting a building board with good external performance
and durability is important, particularly through the build phase, as the product may be left exposed for several months prior to a secondary facade being installed and enclosing the sheathing board. Testing and certification to BS EN 12467:2012 also offers
confidence of the building board’s durability requirement and that it can withstand the exposure cycle of freeze and thaw, heat and rain.
for contribution to fire growth in accordance with BS EN 13501-1. A1 utilises BS EN ISO 1182 and BS EN ISO 1716 tests and is typically non-combustible rating referenced as ‘non- combustible’. A2 utilises BS EN ISO 1716 andBS EN 13823 testing and is referenced to typically as ‘limited combustible.’
CE marking
CE marking is a manufacturer’s declaration that the product meets the requirements of the applicable EC directives in terms of safety, health and environmental requirements. CE marked buildings boards appear under the harmonised standard of BS EN 12467:2012. Demonstrating that the manufacturer has checked that these products meet EU safety, health and envi- ronmental requirements is a key indicator of a products com- pliance with EU legislations and allows the free movement of products within the European market.
And finally…
Develop a relationship with your supplier – they can become a trusted information source and advisor when considering a particular system or experiencing a challenging issue. Some suppliers have a wealth of knowledge and no online technical specification tool can replace first-hand experience. Many will make their expertise readily available with free training and CPD seminars. It is also a clear advantage to be involved with a company that can offer full support in providing the complete through wall solution. Building a relationship with a recognised and credible supplier will mean that specifiers will have a valu- able information source ‘at hand’ and be kept up to date with the latest developments in building board technology.
respond online at
www.architectsdatafile.co.uk
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