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Fire Doors & Accessories FAQs

How thick are your fire doors?

  • Our 30 minute fire doors (FD30) are 44mm thick
  • Our 60 minute fire doors (FD60) are 54mm thick

How much can be removed from each edge of a fire door?

The amount that can be removed from the edges of a fire door differs from one door to the next and depends on several factors, including the exact materials used during construction and guidelines from the fire rating certificate. Accurate trimming information can only be provided by the manufacturer on a case-by-case basis after the door has been completed.

Do your fire doors satisfy disability regulations?

All our fire doors satisfy the DDA regulations.

Are your fire doors made with softwood or hardwood?

FD30 fire doors are made of softwood. FD60 fire doors are made of hardwood.

Are your doors suitable for pocket or sliding door systems?

Our fire doors are not certified for use within pocket or sliding door systems and the glazing and panels we provide is fitted using raised beading.

How do you calculate the weight of a fire door?

In order to calculate the weight of a fire door you will need to know the weight per square meter (kg/m2) of the doors core. This is determined using the thickness of the door as follows:

  • 44mm = 55kg
  • 54mm = 75kg

The calculation below can be used to determine the approximate weight of the fire door. Please note that the calculation does not take glass weight into account.

Width X height X thickness X kg/m2 of the door's core = Weight of fire door.

For example for a door that was 926x2040mm with a thickness of 44mm the following calculation would give an approximate weight:

0.926 X 2.040 X 0.44 X 55 = 45 KG

Do you also supply and fit ironmongery on the doors you supply?

Although we can supply door hinges, door closers and door holders and some other fire rated door accessories we do not have the facility to fit these.

Can remote sounders be fitted to a fire door that requires monitoring?

The Exit Stopper can have remote sounders linked to it using a cable to connect the two. There is no distance restriction to this.

Can I buy a replacement glass tube for my panic bolt?

If your panic bolt has been used in an emergency, you will need to purchase a replacement tube. Replacement glass tubes are available for Redlam and Ashworth Panic Bolts. Alternatively, Ceramtubes™ can be used in place of glass in Redlam Panic Bolts. These ceramic tubes will not produce sharp edges when the tube is smashed.

Can I update existing fire doors that have no seals to conform to regulations?

Yes, you can use the surface mounted fire and smoke seal kits which are available for both single and double doors.

The single door kit can be fitted to either the door or the door frame.

The double door kit needs to be fitted to the doors rather than the door frame so the gap between the doors is covered.

Please note: Surface-mounted fire door seals must be used in conjunction with certified fire doors and fire door equipment. They cannot turn a standard door into a fire door.

Can fire door seals be fitted to the door instead of the frame?

Yes, fire door seals can be fitted to either the door or the frame

Double doors or door and a half fire doors will need to have fire door seals fitted to the door to ensure that the gap between each leaf is taken into consideration.

What are closing force ratings for fire door closers?

The closing force rating of fire door closers, also called "power size", relates to the maximum width and weight of fire doors that the door closer can reliably close and hold closed.

Can a fire door be fitted with self closing hinges?

Whilst it is possible to fit self closing hinges to a fire door, Safelincs does not recommend their use as they slam the door quickly.

Is there a way of securing a fire exit while still allowing access from the outside and ensuring the door cannot be left unlocked?

The best way to secure a fire exit and allow access from the outside while ensuring the door cannot be left open is by using an external code lock. The user can unlock the door using a 4-10 digit code but once the door is closed it will automatically be locked again. The door could also be fitted with a door closer to ensure it closes itself once it has been opened.

Can you make alterations or drill holes in a fire door?

Yes, in some cases you can make alterations to your fire door, however these alterations can only be done if they remain within the scope of the fire door's Certifire Approal documents. For example when a fire rated door viewer or intumescent letterbox / letter plate is required. This information should also be detailed in the installation and maintenance instructions supplied with each door leaf.

It is critical that any changes made to a fire door is done so following the manufacturer’s instructions, by a trained professional, and with certified hardware to ensure that the performance of the door, and it’s associated certification, is not compromised.

BWF-Certifire have created a guide on how to ensure you retain your Fire Door Certification when considering making alterations.

Are intumescent strips required on fire doors?

Yes, intumescent fire seals are required on all fire doors. Newer doors and frames have a channel cut into them for rebated seals (if not supplied with seals already in place). For older doors, surface-mounted seals can be used instead.

Please note: some of our seals have brushes on them, which are designed to block the spread of smoke around the door before ambient heat has caused the intumescent seals to expand and fill any gaps – these are usually required on doors, so make sure a competent person has performed the appropriate fire risk assessments or fire door inspections before purchasing.

Which rooms need fire doors?

Fire doors must be used in walls which form the compartmentation of the premises – specific areas within the building that are constructed to be fire-resistant. These may be individual rooms, but could also contain multiple rooms or might be vertical risers and lift shafts. Fire-rated doors are not required for walls not part of a compartment boundary.

Additional fire doors can be installed in place of normal doors, but they would provide minimal protection as the walls around them may not be constructed of especially fire-resistant materials and could burn through while the fire door remains intact. There is a risk of occupants gaining a false sense of security if fire doors are installed in non-compartment walls, so this should only be done under the guidance of a proper fire risk assessment conducted by a competent person.

Please consult the original building plans, if available, to determine where your premises' fire compartments are, or otherwise have a competent person perform a fire risk assessment or fire door inspection.

What is a fire door?

fire door is made up of a door leaf, door frame, fixtures and fittings and is a specialist door with a fire-resistance rating. Fire doors form part of a passive fire protection system within a building to reduce the spread of fire and smoke. Read our fire door buying guide for more information.


(doc:537 V1.0). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.