Start with the building’s requirements
The required fire performance and any smoke-control provision depend on the door’s location and the building’s fire safety arrangements. A door within a house is not automatically subject to the same requirements as a flat entrance or a door protecting a shared escape route. Appearance alone cannot establish what should be installed.
Before choosing a product, identify who is responsible for specifying the door and approving work where necessary. This may involve the building owner, managing agent, relevant assessor or building control process. A fitting enquiry does not replace that building-specific assessment, and this page does not offer authority certification or claim certified-installer status.
Use a compatible certified assembly
A certified door set brings together components covered by its supporting evidence, subject to the stated conditions. The leaf, frame, hinges, latch, seals, closer and any glazing must be compatible with the specified arrangement. An individually labelled component does not prove that a mixture of otherwise unrelated products will perform together.
Where an existing frame is proposed for reuse, its suitability needs checking against the chosen door’s documentation. Condition, dimensions, material and fixing details can all matter. Replacing only the leaf should not be treated as acceptable by default. Keep product identification and supporting instructions available rather than relying on a supplier’s brief description.
Seals, clearances and frame details
Intumescent strips expand when exposed to heat and form part of the specified protection. Smoke seals serve a different function and may also be required. Their type, position and continuity must follow the relevant assembly instructions, including arrangements around hardware. Painting over, cutting or substituting seals can affect their intended operation.
There is no single gap dimension suitable for every fire door. Clearances at the head, sides and threshold must follow the applicable product evidence and requirements for that location. Frame fixings and the treatment of the surrounding wall junction also matter; neat architraves do not demonstrate that concealed installation details are correct.
Closing reliably in everyday use
Where self-closing is required, the closer needs to suit the door and its intended use. It must be fitted and adjusted in line with the manufacturer’s instructions so the door closes properly, including engagement with the latch where specified. Excessive resistance can make a door difficult for occupants to operate.
Check the completed door’s movement without assuming that a strong push proves satisfactory closing. Floor coverings, seals, hinges and air pressure can affect operation. Do not wedge a fire door open or disconnect its closer to solve inconvenience. Any proposed hold-open arrangement needs appropriate specification rather than an improvised hook or stop.
Agreeing scope before a fitting visit
For an initial discussion, provide photographs, the door’s location, building type and any written specification or assessment. Include product details if a door set has already been selected. Explain whether the property is occupied and whether permissions apply, especially for flat entrances or work affecting shared areas.
Our focus is small to medium domestic jobs discussed for Monday to Friday. Call to establish suitability rather than assuming installation can proceed from photographs alone. Visit the carpentry hub for the wider scope, or see internal doors for ordinary fitting enquiries where fire performance is not the specified requirement.