What is a permit to work?
A permit to work is a formal authorisation for a defined high-risk task in a building, issued for set conditions and a set time, and signed back on completion.
In an occupied building it does two jobs: it controls the risk of the task, and it makes sure the building's operator knows what is happening on their premises. A contractor isolating a system without a permit can disable something nobody knew depended on it.
Typical triggers are hot works, work on live systems, confined spaces, roof access and anything requiring isolation. What they share is that the safe state must be verified rather than assumed.
Contractor permits are the point at which an FM provider's control over third parties becomes real. A permit system that contractors bypass because it is slow is providing documentation rather than control.
In practice
A contractor working above a ceiling in an occupied office.
Fire detection in the area is isolated for the work, correctly, and recorded. The contractor finishes early, leaves, and the isolation stays in overnight.
On an occupied estate the permit protects the people already in the building, and an isolation left in is a building that is not what its own fire risk assessment assumes.
The hand-back is the half of the permit that matters, and it is the half that gets skipped at four on a Friday.
What goes wrong in practice
- Permits raised for in-house staff but not for contractors, which inverts the risk.
- Issued for a period long enough to cover the whole job rather than the conditions verified.
- Not signed back, leaving isolations apparently live and systems unreturned.
- A process slow enough that contractors work around it, which is worse than not having one.