What is the maximum gap allowed around a fire door?

Gaps between fire doors and the door frame should never be more than 4mm or less than 2mm. It’s recommended to aim for a 3mm gap to ensure adequate room for the intumescent strips to activate in the event of a fire, and for the smoke seal strips (if installed) to not get damaged by the opening and closing of the door.

How much can you remove from a fire door?





One of the most common queries about fire doors is how much material can be trimmed off the sides of a fire door. This may be for the purposes of fitting a new fire door into an existing fire-resistant. The short answer is: there is no general, recommended, or mandatory amount on a fire door that can be trimmed.

Can you cut a fire rated door?

The Official Answer. While nothing must be trimmed off the top of a fire door, there is sadly no general guidance to define how much can be trimmed from the sides and bottom of a fire door.

Can you cut a hole in a fire door?

Fire doors should be carefully fitted by a competent person and fitted to the manufacturer’s instructions. If you drill holes into the door this could compromise the integrity of the fire door which could lead to it not offering you any protection in the event of a fire.

What is the allowable edge gap for a 90 minute fire rated door?

Maximum allowable door bottom gap is 3/4″. Gaps that exceed these maximum allowable tolerances result in a non-compliant fire door that needs to be repaired.

What are the legal requirements for a fire door?





Building regulations details where fire doors should be used:

  • Any new build or home renovation that has three or more floors must have fire doors fitted to every habitable room that leads from a stairwell. …
  • Any door leading from your home into an integral garage must be a fire door.

Can fire doors be modified?

Yes! You can make some alterations provided they are within the scope of the fire door’s ‘Certifire Approval’ documents (CF). This information is also contained in the installation and maintenance instructions supplied with each door leaf.

What should you never do to a fire door?

Top things you should not do with fire doors

  1. Never lock a fire door. …
  2. Never leave a fire door wedged open. …
  3. Never allow a fire door to be blocked. …
  4. Enfield Doors.


Can you fit a fire door to an existing frame?

Fitting new fire doors into existing frames is risky because the existing frame may not be fit for purpose or compatible with the certification of the new fire door leaf.

Can you put hooks on fire doors?

Re: Fire Doors
OK this is from the US but would suggest it is not a good idea. Don’t nail or screw signs or other items to the fire door. Creating holes or cracks in a fire door may void the fire protection rating and require replacement of the fire door.

What is a door lipping?



LIPPINGS: These create the door edge and can be reduced slightly in size to fit a specific door opening, without exposing the inner core of the door. Solid lippings (as long as they are large enough) allow the edges of doors to be modelled to form rebated pairs.

Can you cut a vision panel in a fire door?

There are three sets of dimensions: The vision area, The door cut out, and the overall vision panel fascia dimensions. Fire doors are rated as to the maximum permissible area that can be cut out for vision panels whilst still complying with the fire rating of the door blank.

Can you modify a fire-rated frame?

You Can Modify a Fire Labeled Door. Installers are permitted to drill holes in fire-rated doors. This practice is acceptable as long as the hole does not exceed a diameter of one inch (except for cylinder holes), in accordance with NFPA 80 1-3.4.

How much gap should be between door and threshold?

When using a pre-hung door, you need a ¾ to ½ inch gap at the bottom (depending on the thickness of the material) to prevent the door from snagging on, rubbing against, or wearing down the carpet.

Does a fire-rated door need a sill?



Fire door assemblies are not typically required to have thresholds, so defining the terminology helps to establish that the (minimum) 4-inch sill is actually part of the structure of the building – not a hardware component.

Do fire doors have to have seals?

ALL fire doors MUST be fitted with the appropriate seals.
They are designed to expand under heat, and fill the gaps between the door leaf and frame, thereby preventing the passage of smoke and fire to other parts or compartments of the building.

Can you put a window in a fire-rated door?

Glass windows are allowed, but keep in mind they cannot be used in combination with louvers. Doors with a 45-minute rating can have up to 1,296 square inches of glass; doors with 90-minute rating can have up to 100 square inches of glass. Three-hour fire doors may not have glass windows.

Can fire doors have glass in them?

While it is not commonly known, fire doors can have glass in them, and glazed fire doors are becoming increasingly popular.

Can you make your own fire door?



Build your own bespoke internal fire door, selecting from a range of sizes, finishes and glazing options. Choose between custom fire doors supplied individually or with an optional fire door frame. Our bespoke fire doors are available with 30 or 60 minute ratings and optional pre-fit rebated seals.

Can internal fire doors be glazed?

Todd Doors will keep your family, tenants and employees safe with a beautiful range of internal glazed fire doors. We offer a wide range of interior glazed fire doors, available in a variety of styles.