What the golden thread actually is
The golden thread came out of Dame Judith Hackitt's independent review of building regulations and fire safety, published after the Grenfell Tower fire. Her central finding was blunt: too often, nobody could say with confidence what had been built, what products had been used, or who had signed it off. Records were scattered, incomplete, out of date, or reconstructed after the fact. The golden thread is the fix for that.
In practical terms, the golden thread is the accurate, up-to-date information about a building's design, construction and ongoing management, kept in a way that lets the right people understand and manage its safety across the building's whole life. It is not a single document or a one-off handover pack. It is a living record that starts at design, is added to during construction, and is maintained while the building is occupied.
Government guidance frames the golden thread around a set of principles. The information should be:
- Accurate and trusted — a single source of truth, not several conflicting versions
- Kept up to date as the building changes
- Stored digitally, not in a drawer of paper or a folder of loose photos
- Available to the people who need it, when they need it
- Presented so a competent person can actually understand and use it
- Held securely, and durable enough to last the life of the building
What the Building Safety Act 2022 requires
The Building Safety Act 2022 is the primary legislation, with the detail filled in by supporting regulations made under it. It created the Building Safety Regulator (sitting within the Health and Safety Executive), a stricter approvals process built around gateways, and a set of dutyholder roles for design and construction that mirror the familiar CDM structure — client, principal designer, principal contractor, designers and contractors.
The formal golden thread duty bites hardest on higher-risk buildings. In England, that broadly means a building at least 18 metres tall, or with at least 7 storeys, that contains at least two residential units. For those buildings the regime requires golden thread information to be created and maintained digitally through design and construction, and then kept and managed by the Accountable Person (and Principal Accountable Person) once the building is occupied, as part of the building's safety case.
For a fire-stopping contractor working on one of these projects, that flows down to you through the principal contractor and the specification. You will be expected to hand over structured, traceable evidence of every seal, door and damper you install — evidence that becomes part of that building's golden thread. Being honest about scope matters: the strict statutory golden thread applies to higher-risk buildings, not to every job. But as the next section explains, the direction of travel means good records are increasingly expected everywhere.
Why the golden thread matters even below 18 metres
It would be a mistake to read the 18-metre threshold as permission to keep sloppy records on everything shorter. Several well-established duties and pressures push toward proper fire-stopping records regardless of building height.
Regulation 38 of the Building Regulations has for years required fire safety information to be handed to the person responsible for the building at completion, so they can operate and maintain it safely. Passive fire protection records sit squarely inside that obligation.
The Fire Safety (England) Regulations 2022, in force since January 2023, added specific duties for the responsible person in multi-occupied residential buildings — including, for buildings over 11 metres, routine checks of fire doors in the common parts and of flat entrance doors. Those checks depend on knowing what was installed in the first place, which is exactly what your records provide. Industry guidance such as BS 9999 similarly points to regular inspection and testing of installed measures like fire dampers.
On top of the legal picture, main contractors, insurers and clients are now routinely asking for golden-thread-style evidence on jobs of every size, because it protects them too. A contractor who can produce clean, traceable records wins repeat work; one who can't increasingly gets left off the tender list.
What a compliant fire-stopping record must contain
Whatever software or system you use, a defensible record for an individual seal, door or damper should let a competent third party understand and verify the installation without you standing next to them. As a working checklist, each record should capture:
- Location — precisely where it is, ideally pinned to the specific point on the correct, current drawing
- The element and its rating — the wall or floor type and the fire resistance required (for example 60 or 120 minutes integrity/insulation)
- The services penetrating — cables, pipes, ducts, trays and their sizes
- The product and system used — manufacturer, product reference, and the tested/classified system it belongs to (its field of application)
- Evidence it matches a tested system — so the installation can be tied back to test evidence and classification, not just a product name
- Who installed it and when — installer identity, competence, and the date of installation
- Photographic evidence — before, during and after where the sequence matters, tied to that exact location
- Inspection and status — current state (installed, inspected, remedial, complete) and any follow-up required
- A tamper-evident history — a record of changes so anyone can see the evidence hasn't been altered after the fact
The record-keeping failures that fail an audit
Most record problems aren't caused by bad installation — they're caused by good work being captured badly. These are the failures that come up again and again when records are challenged:
- Loose photos with no location — a folder of images nobody can tie back to a specific seal or drawing point
- Spreadsheets and paper that drift — versions emailed around, edited, lost, or quietly overwritten with no trail of who changed what
- No product or system traceability — a note saying "fire stopped" with nothing to prove the installation matches a tested, classified system
- Missing installer or competence detail — no way to show who did the work or that they were competent to do it
- Orphaned records after a drawing changes — a revision is issued and the earlier evidence no longer maps to the live layout
- Retrospective handover packs — evidence assembled from memory at the end of a job rather than captured live at the point of work
- Gaps — seals installed but never logged at all, only discovered when someone counts the penetrations
How to record fire stopping properly on site
The reliable way to avoid every failure above is to capture the record at the point of work, on the drawing, as the seal goes in — not back in the van or at the end of the week.
A sound field workflow looks like this: open the correct, current revision of the drawing; drop a pin at the exact penetration; record the element, rating and services; select the product and tested system; photograph the before, during and after; and confirm who installed it and when. Do that at the moment of installation and the evidence is captured once, accurately, with nothing to reconstruct later.
Two practical points make or break this. First, it has to work offline — plant rooms, basements and stairwells rarely have signal, so the record must capture on the device and sync when connection returns, or people simply stop logging. Second, drawing revisions must be controlled, so that when a layout is superseded the existing pins and evidence stay correctly mapped rather than becoming orphaned.
Why digital, golden-thread recording wins
A well-designed digital system does the things paper and spreadsheets structurally can't. It keeps a single source of truth instead of competing copies. It pins photographic evidence to the precise point on the drawing, so location is never in doubt. And it holds an immutable, tamper-evident history — often using a hash-chained audit trail — so anyone reviewing the record can trust that the evidence hasn't been altered since it was captured. That combination is exactly what the golden thread principles ask for.
This is the gap Assaya was built to close. It's golden-thread recording software for passive fire protection — fire stopping, fire doors and fire dampers, all three trades native — created by fire-stopping installers at Rockfirepro Ltd rather than adapted from a generic forms app. It pairs an offline-first field app with an admin console and a client golden-thread portal, is UK-hosted with UK data residency, is Cyber Essentials certified, and keeps every record on a hash-chained, immutable history with photographic evidence pinned to the drawing. It's designed to align with the Building Safety Act 2022 golden-thread duty, the inspection cadence in the Fire Safety (England) Regulations 2022, and the guidance in BS 9999.
Whatever tool you choose, the principle is the same: capture the evidence once, at the point of work, in a form the building will still be able to trust in ten or twenty years. That is what the golden thread really means for people who install fire stopping — every seal, attested.
Want to see golden-thread fire-stopping records captured on site, pinned to the drawing and locked to a tamper-evident history? Book a walkthrough and see how every seal gets attested — no meter, unlimited drawings and jobs, flat price.
Join the founding listDoes the golden thread apply to my project if it isn't a high-rise?
The strict statutory golden thread duty under the Building Safety Act 2022 applies to higher-risk buildings — broadly those at least 18 metres tall or with at least seven storeys and two or more residential units. Below that, the formal duty doesn't bite, but you still have long-standing obligations such as handing over fire safety information at completion, and clients, main contractors and insurers increasingly expect golden-thread-quality records on jobs of every size. Treating good record-keeping as standard practice is the safe position.
Does the golden thread have to be digital?
For higher-risk buildings, yes — the regime requires golden thread information to be created, stored and maintained in a digital format, kept up to date and available to those who need it. Even where it isn't strictly mandated, digital records are far easier to keep accurate, searchable, backed up and tamper-evident than paper or spreadsheets, which is why they've become the practical standard.
Who is responsible for maintaining the golden thread?
During design and construction the dutyholders — client, principal designer, principal contractor and the designers and contractors under them — are responsible for creating and passing on golden thread information. Once a higher-risk building is occupied, the Accountable Person, and ultimately the Principal Accountable Person, is responsible for keeping it up to date. As a fire-stopping contractor you contribute your installation evidence into that thread; you don't own the whole building record, but your part of it needs to be complete and traceable.
What does a fire-stopping record need to contain to stand up to scrutiny?
At minimum: the precise location pinned to the correct drawing; the wall or floor type and the fire resistance required; the services penetrating; the product and the tested, classified system it belongs to; who installed it and when; before, during and after photographs tied to that location; the current inspection status; and a tamper-evident history of any changes. The test is simple — could a competent stranger verify the installation from the record alone.
Can I keep fire-stopping records in a spreadsheet?
You can, but it's where most audits come unstuck. Spreadsheets get emailed around, edited, versioned inconsistently and separated from the photos and drawings they relate to, and they carry no reliable trail of who changed what or when. They also make it hard to pin evidence to an exact point on a plan. A purpose-built system that captures the record on the drawing at the point of work, offline, with an immutable history solves those problems by design.
This page is general information about record-keeping and current UK fire-safety legislation, not legal or compliance advice. Confirm your specific duties with a competent person.