Steel Fireproofing in Manchester

Intumescent fireproofing is often key for reinforcing steel structures within a passive fire protection strategy. By adding a protective layer to structural steel, intumescent paint extends the length of time a building can withstand high temperatures. This not only reduces damage to steel, but it could also make the difference between fully evacuating a building and putting the lives of occupants and firefighters at risk.

Commercial Sprayers Ltd specialises in the application of Steel Fireproofing in Manchester and intumescent coatings for steel structures in construction projects. With our in-depth technical knowledge, we can swiftly and effectively reinforce structural elements and surfaces, without compromising on their basic functionalities or aesthetic finishes. Our team is also able to apply intumescent coatings both onsite and offsite. This allows us to enact the strictest possible standards of quality control, so clients can be certain that their projects comply fully with building regulations.

How does intumescent fireproofing work?

When subjected to extreme heat exposure, steel will reach its ‘critical temperature’. The exact temperature can vary based on the building design. In Britain, it is commonly 550° but has been known to range between 350° – 750°. Upon reaching its critical temperature steel will begin to lose its nominal integrity and load-bearing capacity, increasing the likelihood of structural collapse.

In the event of a fire, the chemical properties of intumescent paints or sealants undergo an endothermic process. In other words, a chemical reaction causes the materials within the paints to expand when exposed to high temperatures. This creates a protective coating for steel beams, columns and other building elements, without affecting their mechanical properties or basic functionalities. We can help to secure your property Steel Fireproofing in Manchester

Intumescent Paint Application

If a steel framework is coated with intumescent paint, the paint will expand into a carbonaceous char layer which solidifies once temperatures reach around 250°. This increases the steel’s fire resistance time whilst the building is evacuated. The exact performance of intumescent products can vary, offering 30, 60, 90 and 120 minutes of fire resistance depending on the specific type of coating.

There are several ways to apply intumescent products as part of a structural fire protection strategy, the most common being spray application as a thin film coating. Some varieties of intumescent paint can also be given a decorative finish. In this instance, we would engage with the manufacturer to ensure that all the coating finishes we use are compatible.

Intumescent coatings can be classified as either thin film or thick film. Thin film is the industry standard used to protect steel in buildings. In comparison, thick film intumescent coatings are mostly used to handle extreme temperatures in industrial environments, a common example being hydrocarbon fires.

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