All you need to know about internal Fire Doors

All you need to know about internal Fire Doors

Fire Doors in Commercial Setting

All you need to know about internal Fire Doors

Fire Doors play a vital role in the safety and regulation of both residential and commercial properties. Not only do they hold fundamental importance in the protection of our buildings, but also to our livelihoods. 

Where is a fire door required?

Installing an internal fire door helps prevent the spread of fire and smoke throughout your building while providing additional time to vacate the premises safely.

Several factors determine what fire door is required in a building: including the design of a building, the nature of its business and location within the building. 

Building regulations stipulate that fire doors are required in the home in the following circumstances:

  • in a two-storey house which has a door leading from an internal garage into the house.
  • new build or renovated properties which have three or more storeys (including loft conversions) 

The legal minimum fire resistance in a commercial property is 30 minutes, otherwise known as FD30 Fire Door. 

What is the difference between a standard interior door and a fire door? 

Fire doors are manufactured to withstand the spread of fire for a given period, ranging from 30 minutes (FD30) to 120-minutes (FD120). The fire door creates a barrier to prevent the spread of fire and smoke throughout the building.

Unlike that of a standard interior door, a fire door must conform to the following statements:  

  • Fire doors must be constructed from robust, graduated density composite materials that are slow to burn. 
  • Fire doors must be fitted with an intumescent seal that expands when heated, sealing the door’s edge and the door frame. 
  • All glazing apertures and ironmongery fitted to the fire door must be fire-resistant. 

Our fire doors are made with fire-resistant timber controlled by ISO approved standards. Each door comes complete with an IFC tamper-evident label and BM TRADA fire door plug system indicating their appropriate fire rating specification.  

Do fire doors come in different styles?

We offer an extensive range of internal fire door designs and finishes, including glazing options to match your specification without compromising safety

All of our bespoke fire doors can be tailored to suit your requirements, making our fire doors ideal for use in a wide range of applications and sectors. 

Click here to explore Our Fire Door Range 

How are fire doors tested?

To determine a fire door’s resistance, manufacturers have their fire doors assessed by subjecting them to a test procedure as specified in BS 476-22:1987 or BS EN 1634-1:2014.

Tests are made on a complete ‘door set’, including fire door, door frame and ironmongery.  The door set is built into a furnace, to imitate the conditions that occur in a fire. 

The door’s face will be exposed to the heat conditions and pressure applied to the upper door; to simulate the conditions likely to occur in a fire. Throughout the test, the door will be observed for stability and integrity. As part of the testing procedure, a combustible fibrous pad will be placed on the unexposed side of the door to see when it ignites.

Once the testing is complete, the doors receive a rating based on how long they can be expected to resist fire. These are:

FD30 – 30 minutes of fire resistance 
FD60 – 60 minutes of fire resistance
FD90 – 90 minutes of fire resistance
FD120 – 120 minutes of fire resistance

Does incorrect installation make a fire door faulty?

Yes, the installation of a fire door is critical to the door’s performance. Therefore it is essential to follow the instructions set out by the manufacturer to ensure that any elements used are compatible with the door.

You can download our Fire Door Installation manual here

Once fitted, a fire door should be checked every three months. To do so, a registered FDIS inspector should be present to ensure all tests are accurate. 


No matter the purpose or the fire door performance you require, opting for a certified fire door manufacturer will always give exceptional outcomes. We hope that our fire door FAQ has answered your burning questions, and highlighted the fundamental role they play.  

Do you require a quote for a Fire Door?

Please contact our sales team on 0121 356 7046 or complete our contact form.

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