Sustainable Construction - Building & Construction Authority
Sustainable Construction - Building & Construction Authority
Sustainable Construction - Building & Construction Authority
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Cementitious spray-fi reproofi ng<br />
<strong>Sustainable</strong> <strong>Construction</strong> -<br />
Cementitious spray applied fireproofing is a form of plaster which requires only addition of water<br />
at site to form a consistent, pumpable slurry. It is then conveyed by pumping and dispersed onto<br />
building structures by compressed air at the spray nozzle. All these products are factory-mixed<br />
formulations consisting of dry ingredients including aggregates or fibres, gypsum or Portland<br />
cement, and other binders.<br />
There are a number of spray-applied fi reproofi ng products available in the market. Some<br />
products possess fast-setting characteristics that facilitate higher field application<br />
efficiency. The fire rating performance of these products is verifi ed through a series of fi re<br />
tests. Therefore, for the same fire rating requirement, the spray thickness would vary<br />
according to the product manufacturer’s specifi cations.<br />
Environmental conditions such as humidity, temperature and abrasion will affect the<br />
working life of the spray-on system, and these points have to be considered by the<br />
designer.<br />
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