A door swells in winter and you can't certify the fix
A flat-entrance fire door starts catching on the frame every December. A contractor planes the bottom edge, adjusts the closer and signs the job off. Six months later, during a periodic inspection, someone asks the obvious question: what was that door rated to, and does the work done still hold that rating? Nobody can answer. There are no manufacturer details, no installation certificate, no record of the original specification. The door looks fine. But you cannot prove it still performs, and in fire safety, what you cannot prove you cannot rely on.
That gap — the difference between a door that works and a door you can demonstrate works — is usually an O&M problem. Operation and Maintenance manuals are the documents handed over at the end of a building project or a fire-safety installation. They tell you what product went in, who made it, how it was installed, what it was tested to, and how it should be maintained. Without them, maintenance becomes guesswork, and guesswork does not certify.
What the O&Ms actually contain — and why it matters
For passive fire protection, the O&Ms are the technical memory of the building. A proper set will include manufacturer data sheets, product certification, fire-test evidence, installation details and the maintenance regime the manufacturer specifies. For a fire door, that means the leaf and frame specification, the rating (FD30, FD60), the ironmongery used, and the installation that achieved that performance. For fire stopping, it means which sealant, batt, collar or pillow was used at each penetration, what it was tested for, and the configuration it was certified in.
This is the heart of the golden thread that the Building Safety Act 2022 expects you to keep — accurate, accessible information about how a building was built and how its safety measures are maintained over time. For higher-risk buildings the duty is explicit, but the principle is sensible for any building you are responsible for. The O&Ms are where that thread either continues or snaps.
Why certification falls apart without the original record
Fire-stopping products are tested and certified in specific configurations. A fire collar around a plastic pipe is only proven to perform when installed exactly as it was tested — the right product, the right substrate, the right pipe diameter, the right gap. When a contractor opens up a wall to run a new cable and finds existing fire stopping, the first question is: what is this, and was it installed correctly?
If the O&Ms tell them it was a named, third-party-certified system installed two years ago, they can make good around the new penetration, match the existing detail and issue a certificate that carries weight. If there is no record, they are looking at an unknown grey mass in a wall. They cannot identify the product. They cannot confirm it was the right one. They cannot certify a repair on something they cannot identify.
At that point the only defensible route is often to strip it out and reinstall a known, certified system across the whole penetration — sometimes the whole compartment line. Work that should have been a small, cheap make-good becomes a programme of opening up, removing and reinstalling. The frustrating part is that the original work may have been perfectly good. It simply cannot be proved, so it has to be redone.
The same trap with fire doors
What to do now
Find out what you hold. Pull together the O&Ms for every fire-safety installation in your building and check they are complete, legible and identify products by manufacturer and reference. Store them somewhere you can actually retrieve them — not a contractor's hard drive that left with them years ago.
Where records are missing, commission a survey to establish what is actually installed and rebuild the record from there. It is far cheaper than discovering the gap mid-repair. And on every future project, make accepting the O&Ms a condition of signing off the work. The folder is not admin. It is the thing that lets you maintain what you have without paying to replace it.