Commercial · Central London
Central London Office — Cat B Refurbishment Survey Above an Occupied Trading Floor
A financial services tenant needed a refurbishment survey for a Cat B fit-out on the two floors directly above an occupied 24-hour trading floor.
Project anonymised by sector and region. Named version available on request once the client has confirmed publication consent.
Property overview
1980s central London office building with raised access floors, suspended ceilings and multiple riser routes, tenanted across all floors.
Challenge
Any dust or vibration event would disrupt trading below, and access was limited to overnight windows with strict noise limits.
Survey undertaken
Refurbishment survey to HSG264 covering all planned Cat B disturbance zones — ceiling voids, risers, raised floor voids and MEP interfaces.
Materials identified
- AIB soffit boards and riser panels
- Vinyl floor tiles and bitumen adhesives beneath raised floor
- Historic textured coatings retained above later suspended ceilings
Laboratory testing
72 bulk samples analysed to UKAS ISO/IEC 17025 with priority overnight turnaround.
Our solution
Elements phased inspections into overnight windows, used low-impact micro-opening techniques and coordinated with the base build FM team on containment and dust control.
Outcome
The tenant's Cat B fit-out proceeded on programme; base-build FM team retained a clean audit trail of controls used above the trading floor.
Results at a glance
- Trading floor operations uninterrupted
- Refurbishment survey complete within 2 weeks
- Clear register for the fit-out contractor
- No dust or vibration events reported
Timeline
5 overnight visits over 2 weeks
Report turnaround
Draft within 5 working days; final within 10
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