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Passive fire protection and fire-stopping reduces the spread of fire across your premises by compartmentalising the building. This gives people time to safely evacuate and reduces the damage a fire can do before the emergency services arrive.

FIT hold a wide range of accreditations and memberships to instil confidence in the services we provide. Our accreditations and memberships include ISO 45001, FIRAS, SafeContractor, Achilles UVDB Silver Plus and British Fire Services Association membership. Our fire division is overseen by our director Luke alongside John Boyton, an ex-firefighter with over 30 years of experience.

Our Fire Stopping Services

We provide a range of fire-stopping services that are designed for the lifecycle of your building. From when it’s first being designed to when you come to sell, the FIT team is on hand to keep people safe.


Fire Compartmentation

Dividing your premises into a number of compartments to contain a fire and stop its progression through a building. Fire-rated partitions, floors and ceilings are essential to ensure effective fire compartmentation and they are a fundamental component of any fire safety design.

▪︎ Creation of fire compartments
▪︎ Fire walls, floors and ceiling
▪︎ Fire stopping above bulk heads
▪︎ Compartmentation of communal space
▪︎ Apertures and penetrations sealing

Fire stopping

Consulting & Building Design Support

We can work with architects, developers and building designers to make sure that the fire safety of all new buildings conform to the required regulations and go above and beyond to keep occupants safe. We can also advise on the best solution for any issues found in the planning and design phase of the project.

This can avoid costly remediation work at the end of the project to bring it up to code.

Fitting passive fire protection

We can work alongside your contractors during the construction phase of the building to fit passive fire protection and advise on the best solution to any issues uncovered. We can also retroactively fit passive fire protection to your building where issues have been found or the original protection is no longer up to the task.

Passive fire protection audits

Our expert fire safety teams are able to audit your current fire protection measures against best practices. They can also check the building to make sure that any changes to the building have not impacted fire safety. It can be the case that minor changes such as new plumbing, electrical or internet cabling can cause fire compartments to be breached. If the contractor is not aware of fire safety there is a chance that the fire compartment has been compromised and you won’t know until it’s too late.

Our audits are designed to pick up on these issues that are easily and accidentally overlooked.


Fire safety can be complicated with lots of similar-sounding products with similar functions. We can help you decide what fire stopping solution is most suitable and then order the products and have them shipped to you to fit or one of our experts can come and fit these for you.

Fireboard Encasement

Fire rated board encasement protects the structural integrity of concrete, steelworks and timber frameworks in the event of a fire. Fireboard encasement systems provide an effective passive fire protection solution for various types of building structures. FIT has experience in the installation of fireboarding encasements to provide fire resistance lasting from 30 to 240 minutes.

▪︎ Fireboarding to structural steel and surrounds
▪︎ Fireboarding to timber structures and surrounds
▪︎ Fire rated ceilings and partitions

Fire Doors

Fire rated door installation is a vital element of a passive fire protection strategy for any building. Fire doors are designed to slow the progress of a fire and its components – flame, smoke and toxic gases, by halting its spread from compartment to compartment within the building.

▪︎ Fire doors achieving 20 – 240 minutes fire resistance
▪︎ Single and double leaf fire doors
▪︎ Bespoke fire doors
▪︎ Decorative finish fire doors
▪︎ Glass fire doors
▪︎ Smoke seals and intumescent gaskets
▪︎ Fire door repairs

Fire Stopping

First Intervention Team has a wealth of experience in undertaking a host of fire stopping and passive fire protection installations for property maintenance companies, hotels, hospitals, schools universities and main contractors.

▪︎ Apertures and penetrations sealing
▪︎ Linear gap fire sealing
▪︎ Firestopping around services
▪︎ Fire batt and mastic applications
▪︎ Fire safe ducting and ventillation

Structural Steel Protection

Steel structures are now reported to account for approximately 70% of the available multi-storey framed buildings with adequate and correctly installed structural steel fire protection is an integral part of the passive fire safety strategy for these buildings.

▪︎ External and internal steel fire protection
▪︎ Fire ratings from 30 – 240 minutes
▪︎ Cementitious coatings
▪︎ Intumescent thin-film coatings and paints
▪︎ Light board-based steel protection (e.g. rock fibre)
▪︎ Heavy board-based steel protection (e.g. Calcium Silicate)

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Our experts are on hand to review, install and supply everything for your passive fire protection and fire stopping needs.

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Our Fire Stopping Solutions

We have a wide range of experience with a range of passive fire-stopping solutions including:

Linear Joint Seals

Linear joint seals are designed to seal two different fire-stopping panels together, for example, fire-resistant foam insulation or fire boards. There are several approaches to creating a linear joint seal and our experts will decide on the best option based on the building and materials used.

Firestop Pipe Wraps

Firestop pipe wraps are designed to create a seal around plastic pipes and trunking within your building walls using an intumescent material. As a fire takes hold it can spread through your building via plastic pipework or cable trunking, breaching your fire compartments. Pipe wraps are designed to fit around your pipes in areas where they exit a compartment. Under fire conditions, the intumescent material expands to fill the void where the plastic pipework has melted. This stops fire, smoke and gases from exiting the fire compartment via the hole left by the melted pipe.

Batt & Mastic Seals

Fire-resistant batt and mastic seals are required anywhere where you have services, such as electrical wiring or plumbing, breaching the fire compartment. During the first phase of construction, fire compartments will be built into the building however each room will need to have electrical connections which means holes need to be made into the compartment. Batt and mastic seals are designed to reinstate fire resistance where the cabling penetrates the compartment.

Compound Fire Seals

Similar to batt and mastic seals, compound fire seals are created around pipework that penetrates the fire compartment. The difference between these and batt and mastic seals is that compound fire seals are created from a gypsum-based mortar which means they can be used in load-bearing situations.

Intumescent fireproofing

Intumescent paints are a common way to protect load-bearing steel structures during a fire. Intumescent paint is designed to increase the time it takes for the steel structure to reach critical temperature, giving occupants time to safely evacuate the building or for the fire service to arrive on the scene. At FIT we can work with you during the construction phase or help you retroactively apply intumescent fireproofing to increase the safety of your building.

Fire Collars

Fire collars are designed to stop a fire from spreading throughout the building via any pipework that passes through multiple fire compartments within the building. Fire collars fit around the outside of pipework and contain an intumescent material. As the intumescent material begins to expand in the heat, the pipe is crushed and the fire and smoke are unable to pass through.

Fire Damper

Fire dampers are similar to fire collars however they are designed for HVAC and other ducting within the building. There are two main types of damper, intumescent and mechanical. Intumescent fire dampers swell up to stop the spread of smoke and fire while mechanical ones have an element that melts which causes them to close up via a spring.

Cavity barriers

As rooms are laid out within the building structure there will be empty compartments between the structure and the room itself where a fire will be able to spread. Cavity barriers are designed to block off these empty compartments and stop the fire from spreading upwards throughout the building.

What is passive fire protection?

Passive fire protection is a way of slowing the spread of a fire in your premises by using fire-rated construction materials to create compartments within your building. These commonly include fire doors, protecting the building frame and sealing gaps around pipework and ducting.

Reviewing fire door building plan

Why do I need fire stopping and passive protection?

Fire stopping and passive protection help to save lives if a fire breaks out. By compartmentalising the building you make it harder for the fire to spread which gives the occupants time to safely escape the building. Once people have been evacuated from the building it continues to slow the spread of the fire until the emergency services turn up. By slowing the spread of the fire less damage is done to the building which means it could be repaired depending on the outcome. It also means that business assets such as computers and other equipment that have escaped damage can be rescued and reused.

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