Yes, you can paint a fire door, but only within strict limits, because a fire door is a tested, certified assembly rather than an ordinary door. A sensible number of coats of conventional paint on the face of a timber fire door leaf is generally accepted and will not stop it doing its job. Painting the wrong parts, burying the intumescent seals or hiding the certification mark can compromise the door’s fire performance and even invalidate its certification, which in a commercial building is a serious matter.
Halls Decorators carries out commercial decorating and fire protection painting across Yorkshire, Lancashire and Greater Manchester, so fire doors are a familiar part of the work. We set out what you can and cannot do when decorating a fire door, who is responsible for them, and how to keep a building both smart and compliant.
Why is a fire door more than just a door?
A fire door is not a single component but a complete assembly that has been tested and certified to hold back fire and smoke for a set period, usually thirty or sixty minutes and recorded as FD30 or FD60. That assembly includes the door leaf, the frame, the intumescent and smoke seals, the hinges, the closer and any glazing, and it is certified as a whole. Change one element and you can affect the performance of all of it.
This is why decorating a fire door is not quite the same as painting any other door. The goal is to refresh the appearance without altering anything that the door relies on to perform in a fire.
What are the rules for painting a fire door?
Never paint over the intumescent seals
The intumescent strip set into the edge of the door or frame is the part that expands under heat to seal the gap and stop fire and smoke passing through. Clogging it with paint can stop it expanding properly when it matters most. As a rule the seals should be left unpainted, and if a manufacturer permits a light coat it will say so in its guidance. If in doubt, leave them alone.
Keep the certification label or plug visible
Certified fire doors carry a label or a colour-coded plug, usually on the top or hinge edge, that identifies the door and its rating. This is how an inspector confirms the door is what it claims to be. Painting over it removes that evidence, so the identifier must be kept clean and visible.
Do not obscure signage or vision panels
Fire door signage such as “Fire door keep shut” has to remain legible, and any vision panels must stay clear. Neither should be painted over or allowed to get caught by overspray during decorating.
Avoid heavy paint build-up
Fire doors are hung to fine tolerances, with small, consistent gaps around the leaf so they close and latch correctly. Layer after layer of thick paint can affect those clearances and how the door sits, so it is better to keep coats thin and well applied than to build up heavy coverage over the years.
Use compatible coatings and follow the manufacturer’s guidance
Different door cores and finishes suit different coatings, and the door or coating manufacturer’s instructions take priority. Using a compatible, well-prepared system keeps the finish sound without introducing anything that could react badly with the door or its seals.
Does painting a fire door affect its certification?
It can, if the work goes beyond ordinary redecoration. A fire door’s certification depends on it remaining as it was tested, so painting over the seals, hiding the identification label or altering the door in other ways can call its certified status into question. Straightforward decoration that leaves the seals, label, signage and clearances untouched keeps the door as it should be.
Keeping a simple record of what was done, and the products used, is sensible on a commercial site where the door’s condition may need to be demonstrated later.
Who is responsible for fire doors in a commercial building?
In most commercial premises the duty sits with the “responsible person” under the Regulatory Reform (Fire Safety) Order 2005, who must make sure fire doors are maintained in effective working order. Decorating a fire door does not replace that duty, and it is not a substitute for regular inspection by a competent person. In practice the two go together: good decoration keeps a door looking cared for, while proper checks confirm it will still perform. Treating a repaint as a tick in the compliance box, rather than as cosmetic work carried out with care, is where buildings get caught out.
Getting fire door decoration done properly
The safest approach is to have fire doors decorated by a contractor who understands what they are and works around the parts that matter. Halls Decorators handles fire doors as part of wider commercial decorating and brings experience of fire protection painting to the job, so doors are refreshed without putting their performance or certification at risk.
If you have fire doors due for attention as part of a wider scheme, you can get in touch with the team to talk it through.