What a fire door sensor can and cannot tell you
An honest account of the failure modes continuous monitoring catches — and the ones it does not.
·6 min
Topics
Monitoring is not a replacement for looking at a door. It is a replacement for guessing what happened to it between the times somebody looked.
What it catches
Closure failure, held-open events, misuse patterns, and the slow drift in hardware behaviour that precedes a hard failure.
What it does not
Construction defects, seal condition, certification and glazing. These still need a competent person. What changes is that the visit is targeted by evidence rather than scheduled blind.
Placeholder copy.
Related reading
Insight · 5 min
Why the annual inspection was never going to be enough
The arithmetic of sampling a system that fails continuously — and why 75% is not a surprising number.
ReadWhitepaper · 40 pp
The true cost of periodic fire door inspection
Where the money actually goes: inspection contracts, the remedial backlog periodic checking creates, premature replacement, and the admin overhead of assembling evidence four times a year.
ReadGuide · 9 min
The Fire Safety (England) Regulations 2022, in plain English
Every duty the regulations place on a responsible person for fire doors, what triggers each one, and what evidence satisfies it.
Read