Why compartmentation matters
It buys time for escape, protects firefighters and limits property and business loss. It only works if every element — walls, floors, doors, dampers, seals — is intact.
Survey types (1–4)
Type 1 is non-intrusive desk review; Type 4 is fully intrusive sampling. Most clients commission Type 3 or Type 4 for occupied buildings under the current regime.
Typical failure modes
Unsealed service penetrations, missing or damaged cavity barriers, breached riser walls, ill-fitting doors and inappropriate substrates around penetrations.
Evidenced remediation
Each defect closed against a named tested system, with a per-defect photograph, system reference and asset register entry — verifiable by the original surveyor.