Top 10 Most Common Fire Door Defects Found in 2026 (and How to Fix Them)
In 2026, the scrutiny on fire safety has never been higher. With the Building Safety Act 2022 and Regulation 10 mandates in full swing, property managers are conducting more frequent inspections than ever before.
At Fire Stoppers, we’ve carried out thousands of surveys this year. While every building is unique, we see the same critical defects appearing time and again. The good news? Most of these don't require a full door replacement. Here are the top 10 defects found in 2026 and how to professionally remediate them.
1. Excessive Gap Tolerances
The Defect: Gaps between the door leaf and the frame exceeding the mandatory 2mm–4mm range.
The Fix: Precision fire door remediation. We use specialist techniques to adjust hinges and frames or, in some cases, apply fire-rated "shims" to bring the door back into compliance without replacing the unit.
2. Damaged or Missing Intumescent Seals
The Defect: Seals that are painted over, peeling away, or missing entirely.
The Fix: We remove the old material and install new, high-quality intumescent and smoke seals. These are vital for blocking lethal gases and ensuring the door expands correctly during a fire.
3. Faulty Overhead Door Closers
The Defect: Closers that fail to shut the door into the rebate from any angle, or "slam" too hard, damaging the frame.
The Fix: Often, a closer just needs professional adjustment. If it’s leaking oil or has lost tension, we replace it with a CE-marked, fire-rated closer that matches the door's weight and size.
4. Non-Fire-Rated Hardware (Hinges)
The Defect: Standard "DIY" hinges were used on a fire door instead of Grade 13 BS-marked hinges.
The Fix: We replace non-compliant hardware with certified components. Standard hinges can melt or buckle under extreme heat, causing the door to drop and the fire seal to breach.
5. Damage to the Door Leaf or Frame
The Defect: Splintering, deep scratches, or holes caused by trolleys and heavy foot traffic.
The Fix: We utilise fire-rated timber fillers and specialist repair kits. These materials are tested to maintain the door's FD30 or FD60 rating while restoring the aesthetic finish.
6. Incorrect Glazing and Vision Panels
The Defect: Cracked glass or non-fire-rated glass installed as a "quick fix."
The Fix: We replace vision panels with fire-rated glazing and install specialist glazing beads and liners that expand under heat to keep the glass securely in place.
7. Propped Open Doors
The Defect: Fire doors being held open with wooden wedges or fire extinguishers.
The Fix: This is a behavioural issue that requires a technical solution. We install acoustic-triggered devices or electromagnetic hold-open devices that automatically release the door when the fire alarm sounds.
8. Insecure Latching
The Defect: The door shuts but doesn't "click" into the latch, meaning it could blow open due to the pressure of a fire.
The Fix: We adjust the strike plate and handle alignment to ensure a positive latch every single time the door closes.
9. Unprotected Letterboxes
The Defect: Standard letterboxes installed in fire doors without intumescent liners.
The Fix: We install fire-rated letterbox kits that feature built-in intumescent material, which swells to plug the hole if a fire starts.
10. Lack of Documentation and Labels
The Defect: Missing certification labels, making it impossible to prove the door’s fire rating.
The Fix: While we can’t "invent" a label, our fire safety record management services involve a specialist survey to identify the door’s construction and create a digital asset tag, providing the audit trail needed for compliance.
Conclusion: Remediation vs. Replacement
Most of these defects can be resolved for a fraction of the cost of a new door. By choosing professional remediation, you extend the life of your assets while maintaining total safety.
Don't let these common defects turn into legal liabilities. If your recent inspection has flagged any of these issues, contact the Fire Stoppers team today for a comprehensive remediation quote.
