Higher-risk buildings · England & Wales
A record you can prove, not just a folder you can find.
TBM holds golden thread information as structured records with a verifiable chain of custody, from Gateway 2 through handover and into occupation.
External wall construction, levels 12 to 17
- Version
- 4 supersedes v3, 11 Mar 2026
- Authored by
- R. Emlyn Principal Contractor
- Verified by
- J. Hartley Fire engineer, 14 Mar 2026
- Approved by
- S. Okonkwo Principal Designer
What it does
Four things a folder of PDFs cannot do.
Structured, not filed
Information attaches to buildings, structures, assets and dutyholder roles. You can ask which fire doors on a level were installed by whom, under which certificate.
Provable, not asserted
Every change writes to an append-only, hash-chained audit trail with signed checkpoints. A record can be shown to be unaltered on a given date.
Continuous, not handed over
One record runs from design intent through construction and change control into occupation, inspection regimes and the safety case.
Portable, not locked in
Full export with a verifiable manifest, at any time. These records must outlast owners, agents and software vendors, including us.
Where duties meet features
Every obligation, traced to the thing that satisfies it.
We publish the mapping in full rather than describing it in general terms. It is the most useful page on this site whether or not you ever become a customer.
- Dutyholder appointment and cooperation
- Competence of dutyholders and the supply chain
- Gateway approval before works begin
- Golden thread creation and maintenance
- Change control during construction
- Mandatory occurrence reporting
- Handover to the Accountable Person
- Safety case and building assessment
- Resident engagement and complaints
Two jurisdictions
England and Wales are not the same, and the differences bite.
The Welsh regime came into force on 1 July 2026. It catches buildings with a single residential unit rather than two, runs approvals through local authority building control rather than a central regulator, and has no concept of independent sections for works to existing buildings.
TBM records jurisdiction on every rule and every building, so a project is assessed against the regime that actually applies to it.
Community
Working it out together.
A group for construction professionals in England and Wales dealing with the same problem. Free, no pitch, and open whether or not you use TBM.
The most common question we are asked is not what the regulations say. It is who is actually holding the golden thread once the contractor has left site.