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.
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.
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:
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
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.
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.
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.
(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.