Fire doors are heavy, engineered components. They can be damaged long before a building is occupied, and small handling or installation mistakes can turn into significant remedial work. For related guidance on fire door frame damage, check the condition of the frame as well as the leaf.
This guide explains the common ways fire doors are damaged during handling, storage and installation, what to inspect, and what to do before attempting a repair. Where damage affects the frame or door geometry, the wider fire door fault finding process helps establish the cause before repair.
Fire door damage often starts before installation
A fire door may arrive on site in perfect condition and still be damaged before it reaches the frame. Heavy leaves have to be carried through doorways, around corners, up stairs and into position, sometimes in difficult site conditions.
The door leaf should be treated as a finished engineered component. Its faces, edges, corners, lippings, seals, machined areas and factory-applied details all need protecting.
Don’t stand a heavy fire door on one corner
One of the simplest ways to damage a door edge is to concentrate the weight of the complete leaf onto one small corner.
When a heavy door is stood on a corner and rotated, the load is concentrated through a very small area. This can crush the timber fibres, dent the edge, split the lipping or pull timber apart along the grain.
Pay particular attention to the bottom corners and closing edge.
- Crushed or compressed timber
- Split or lifted lipping
- Open joints
- Dents and impact marks
- Missing timber
- Damaged corners
- Changes to the edge profile
Don’t just inspect the face of the door. Inspect the edges and corners as well.
Dragging a fire door can damage the edge
Dragging a heavy door across a concrete or unfinished floor can put damaging forces into the bottom edge. If the edge catches, timber fibres can be crushed or torn away.
Move the leaf using a method that supports it properly rather than treating the edge as a runner. On stairs and difficult access routes, use a suitable handling method and follow the site’s manual-handling arrangements to reduce the need to drag or balance a heavy leaf through the building.
Protect the door while it is being stored
Storage should follow the door manufacturer’s requirements. Protect the leaf from moisture, impact, contamination and poor handling.
Do not leave finished doors where other materials can fall against them or where people carrying tools and equipment have to squeeze past them. Consider how the leaf is supported: concentrated loading on an edge or corner can cause damage even while the door is simply standing on site.
Check the door before you hang it
Inspecting the door before installation establishes a useful condition record. If damage is found later, you have a better chance of establishing when it occurred.
Check the:
- Door faces
- Top and bottom edges
- Closing edge
- Hinge edge
- Lippings
- Corners
- Factory-applied seals and edge details
- Machined areas
- Glazing, where applicable
Photographs can be particularly useful on larger projects where doors are delivered in batches and installed over an extended period.
Machining and installation can create another set of problems
A fire door is not an ordinary piece of timber that can simply be cut, drilled or altered wherever necessary. Preparation for hinges, locks, latches, closers, handles and other hardware needs to remain within the limits permitted for the particular door and its supporting evidence and manufacturer’s instructions.
If substantial material has to be removed to make hardware fit, stop and establish why. The problem may be with the hardware, preparation, door, frame or specification.
Do not turn an installation problem into permanent damage to the door leaf.
Damage can happen after the door is hung
A hung fire door can become part of a busy traffic route during construction and occupation. Furniture, beds, trolleys, filing cabinets, equipment and building materials can strike the door while it is opening or closing.
A self-closing door can also close onto an object being moved through the opening. The face may survive while the edge or lipping is damaged.
Protect the installed door from the activities taking place around it, not just from damage to its face.
Protecting a fire door is not just about the face
Temporary cardboard, film or other face protection can be useful, but the edges are often the vulnerable areas. Bottom corners, closing edges and lippings can take impacts that a face covering does not prevent.
Consider what is actually happening around the doorway. If heavy equipment is being moved through the opening repeatedly, the protection needs to address the real risk.
What happens when the lipping is damaged?
It depends on the extent and location of the damage and, critically, on what repair method is supported for that particular door.
A small-looking defect does not automatically mean that the complete doorset must be replaced. Equally, it does not mean that a piece can simply be glued back on or filled with an unspecified material.
Repairs should be assessed against the manufacturer’s instructions, available repair information and the evidence applicable to that particular door.
Where damage extends into the door construction, affects edge details or seals, or involves unauthorised alteration, the situation needs particular care.
Don’t guess the repair. Establish what the door is and what repair method is permitted.
Don’t confuse installation damage with other fire door problems
Damage to the door leaf is one type of problem. Frame movement, hardware faults, fire-stopping defects and other installation problems are separate issues, although they can interact.
If the damage is to the leaf itself, start by establishing exactly what has physically happened to the leaf and when and how it may have occurred.
What to look for when inspecting a damaged fire door
- Where exactly is the damage?
- Is it on the face, edge, corner or lipping?
- Does the timber look crushed, split, torn or cut?
- Does the damage follow the grain?
- Has material been removed?
- Has the leaf been machined or otherwise altered?
- Are any seals or edge details affected?
- Has the damage changed the fit or operation of the door?
- Does the door still close and operate correctly?
- Is there evidence of an earlier repair?
- Is there a manufacturer-approved or otherwise supported repair method?
Recording the exact defect is much more useful than simply describing a door as “damaged”.
Small damage can create bigger remedial work
The original mistake may take seconds to make. Repairing it later can involve removing the door, identifying the correct repair information, sourcing materials, carrying out the repair, redecorating and checking the doorset again.
On a large project, repeated small defects can become a significant maintenance problem. Prevention is normally much simpler than dealing with avoidable damage afterwards.
Before the door goes into the frame
- Check the door when it arrives.
- Handle the leaf without concentrating loads onto corners or vulnerable edges.
- Store it in accordance with the manufacturer’s requirements.
- Protect it from site traffic, impact and contamination.
- Inspect edges, lippings and seals before installation.
- Carry out machining and hardware preparation within the permitted limits for that door.
- Protect the installed door from other trades and site traffic.
- Record significant damage rather than simply covering it up.
- Establish the supported repair method before repairing damaged construction.
Fire door damage is often preventable
A large proportion of avoidable damage comes from ordinary site activities: carrying the leaf badly, standing it on a corner, dragging it across a floor, storing it poorly, carrying out unsuitable alterations or allowing other activities to strike the installed door.
The important thing is to catch damage early. Inspect the door when it arrives, before installation and after installation. If something has changed, establish why.
A fire door is a tested and engineered component. Treating it like ordinary timber can create problems that did not need to exist.
Don’t just repair the damage — find out how it happened
If a door arrives damaged, record it. If it becomes damaged during installation, establish the cause. If several doors are being damaged in the same way, look at the process rather than repeatedly repairing individual leaves.
The cause may be storage, the route through the building, the installation sequence or inadequate protection. Correcting the process can prevent the same defect from appearing across an entire project.
Fixing the damage is only half the job. Preventing it from happening again is the other half.
About the author
Eddie Proudman is the founder of Proudman Fire and has over 30 years of joinery experience, including many years specialising in fire door remedial work. Proudman Fire develops professional fire door tools based on problems encountered on real sites.
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