Sustainable Construction - Building & Construction Authority
Sustainable Construction - Building & Construction Authority
Sustainable Construction - Building & Construction Authority
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Intumescent Paint<br />
The use of intumescent coating to<br />
give fire protection to steel structure<br />
is permissible as long as it is applied<br />
appropriately and the environment in<br />
which the structure is subjected to is<br />
non-detrimental to the fire protective<br />
properties of the coating. Intumescent<br />
paint coatings may be applied to give<br />
up to 120 minutes of fire protection.<br />
Only intumescent paint products<br />
listed in the PLS are acceptable to the<br />
Relevant <strong>Authority</strong>.<br />
<strong>Sustainable</strong> <strong>Construction</strong> -<br />
How does intumescent paint work?<br />
In the event of fire, the thin coating of<br />
intumescent paint expands up to 50 times<br />
to form a layer of insulating foam. The carbonaceous<br />
material in the intumescent paint,<br />
typically starch, is charred whilst the heat<br />
also causes the release of acids. These act<br />
to produce large volumes of non-infl ammable<br />
gases which blow up the charring starch within<br />
the softened binder of the intumescent paint<br />
into an insulating cellular carbon layer.<br />
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