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Everything you need to know about intumescent coatings

Introduced in the 1940s, intumescent coatings are one of the most modern ways to protect your building from fire damage. It’s a material initially made from epoxy, urethane, and acrylic resins. But in later years, it was combined with graphite (a natural fire-resistant material).

As the material continues to develop, intumescent coatings are now applied in multiple layers with varying thicknesses. All of which serving the single purpose to protect the structural integrity of your steelwork in the event of a fire. Here’s everything you need to know about intumescent coatings.

Intumescent coating

What are intumescent coatings?

Intumescent coatings protect the structural integrity of your property in the event of a fire. When exposed to heat, the compound expands to form a carbon-like foam which acts as a fire-resistant barrier to protect your steelwork.

It’s a material widely used in commercial properties throughout the UK. Not only to reduce the rate of temperature rise, but to protect evacuation routes and limit the possibility of your building collapsing when exposed to extreme heat.

Why are intumescent coatings important?

When steel reaches a temperature beyond 500℃ (932℉), it often undergoes significant physical and metallurgical changes – both of which causing a rapid loss of strength and structural integrity to your building.

By applying an intumescent coating, structural steelwork is more likely to withstand the heat caused by fire. And by doing so, protecting occupants and reducing the risk of significant repairs caused by collapse.

Having proof of intumescent coatings also carries a financial benefit by potentially lowering your buildings insurance.

What are building regulations for intumescent coatings?

Building regulations mandate intumescent coatings for structural steelwork, especially for buildings exceeding a height of 18 metres. As well as being applied by a recognised specialist, it must also have the appropriate third-party certification to conform with Building Regulations Approved Document B.

Areas that require a coating will depend on the structure of your building. But in most cases, it applies to all steel elements over 18 meters such as beams, columns, and other components that make up the structural integrity of your building. All of which tested following installation.

Book a site inspection

To learn more about intumescent coatings and how they protect the structure of your building, call our team on 0330 043 8244. We’d be glad to help.