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Passive Fire Protection Services

At Fire immunity we offer a wide range of different passive fire protection services to meet any needs or requirements you might have for protecting your home or business. So what is passive fire protection? For any fire protection strategy to be successful passive fire protection must be prioritised. Passive fire protection’s goal is to reduce the financial damage a fire might cause but most importantly safeguard human lives. So how does PFP do this?

  • PFP will contain a fire within individual compartments to reduce the risk of spreading faster through the building.
  • Allows Individuals within the building to use escape routes by directing fire away from them.
  • Minimizing the amount of damage the fire causes to the building, ultimately protecting the structure of the building.

Which Passive Fire Protection Application is best for you?


Passive fire protection methods require no input of external energy or human intervention, hence the name, ‘Passive’. A compartmentalized fire confines the fire as long as possible within a compartment so people can be evacuated and emergency services can intervene. There are many different methods that target different building integrities.

Fire Barriers

One of the most common problems with buildings that we come across, is the unsealed spaces between internal and external walls. A chimney effect can be created if these cavities are left unsealed which could speed up vertical fire spread extremely quickly. Installing a cavity barrier will prevent the spread of fire between one compartment to another across a large building.

Structural Steel Protection

By applying intumescent coatings you are providing insulation at a higher temperature which in turn ensures the structure of your steel-framed building. This passive fire protection service can be applied by our highly qualified team at any stage of a commercial building’s constructions stages. The intumescent coating reacts with fire by creating a charred layer above the steel which can withstand heat reaching 200°C. 

Air Sealing

Air sealing has a range of benefits ranging from; reducing the cost of internal heating and cooling; improving air quality, increase in building durability; reduces a building’s environmental impact. In the event of a fire, Air Leakage is not only detrimental to the spread of flames but can also have an impact on energy efficiency which ultimately damages your pocket. Fire Immunity are experts at providing effective and durable air sealing solutions at an affordable price. Buildings with leaks and gaps within their structure will be sealed with the best materials available, improving thermal efficiency and increasing fire protection.

Compartmentation Survey

Invasive surveys, like these, are conducted by entering roof spaces, ceiling voids, and floor voids, as well as behind boxings and other structures. Fire compartment evaluations include an inspection of the existing compartments in the structure, including the doors, floors, and ceilings, and determining whether they are effective in the restriction of fire and smoke spread. The time required to escape the building is determined using fire safety regulations (the size of the building determines how long it will take).



Perfect for filling gaps in gaps where cables and pipes enter the interior and exterior walls, a fire protection compound is perfect for filling these areas to prevent the circulation of air.  Once heated, it forms a gas/smoke tight seal, giving additional protection from fire for up to 4 hours. At fire immunity, we provide this Passive fire protection service while also servicing the replacement of an older compounding with a newer, more effective material.



Below we have identified some questions that are frequently asked by our clientele. If you have any questions that haven’t been answered please don’t hesitate to give our team a call on 07399488039!

Put simply Passive fire protection aims to slow down fire without any human intervention or moving parts. Whereas active fire protection is about putting parts in place to detect, stop and escape a fire. Examples of Active fire protection is placing fire extinguishers in appropriate places throughout the building or installing sprinklers in every compartment. 

6 Months – Generally speaking there should be an inspection of all passive fire protection to ensure the effectiveness and age of intumescent paints/smoke seals. The time can vary depending on the condition and performance of these seals/paints.


Bristol & Surrounding South West Area