Central London Building Performance Diagnostics — Listed & Heritage Specialists
Central London — Westminster, Marylebone, Mayfair, Soho, Fitzrovia, Bloomsbury, Holborn, Clerkenwell, the City of London and the South Bank — has some of the most demanding building stock in the UK: Listed Georgian and Victorian period properties, prestige conversions, mansion blocks, and high-spec new-build apartments. Every project here must reconcile heritage constraints with modern building-performance expectations.
Diagnostics-led building performance, delivered locally.
Every survey starts with measurement — FLIR thermal imaging, blower door testing, moisture mapping and surface temperature readings. The findings drive the spec, not the other way round.
- Home Health Diagnostic Survey
- Thermal Imaging Survey
- Blower Door / Airtightness Testing
- Damp, Moisture & Condensation Investigation
- Internal / Loft / Underfloor Insulation Retrofit
- Soundproofing & Acoustic Upgrades
Considering work in Central London? Book a measured, evidence-based survey before any remedial spec.
Book a SurveyWhat we see, measure and remediate across Central London.
These are the recurring building-physics issues we diagnose across Central London. Every project still starts with measured data — but knowing the typical patterns helps focus the investigation.
- ▪Listed mansion blocks with single-skin solid brick walls and no permission for external insulation
- ▪Original 6-over-6 sash windows with substantial heat loss around frames
- ▪Light wells and back additions trapped between adjoining buildings — chronically cold party walls
- ▪Original lath-and-plaster ceilings on top floors with no loft insulation
- ▪Steel-framed Edwardian / inter-war mansion blocks with linear thermal-bridge cold bands at every floor slab
- ▪Mansion-block bedrooms and bathrooms with original single-pane glazing producing chronic winter condensation
- ▪Internal courtyards trapping moisture-laden air with no cross-ventilation
- ▪Heritage-paint and gypsum-plaster finishes failing where wall surface temperatures fall below dewpoint
- ▪Listed-fabric constraints making conventional internal insulation high-risk
- ▪Original cast-iron service risers and chimney flues providing whole-building bypass paths
- ▪Floorboard perimeters and panel-skirting gaps in Georgian terraces
- ▪Original sash window draughts and unsealed shutter boxes
- ▪Pre-1980 lift shafts in mansion blocks acting as continuous stack-effect chimneys
- ▪Vapour-open IWI with hygrothermally-modelled wood-fibre build-ups on Listed walls
- ▪Discreet airtightness sealing on suspended floors, sash-window perimeters and loft hatches
- ▪MVHR routed through original service voids and ex-chimney stacks
- ▪PHI EnerPHit-led whole-flat refurbishment design for prestige clients
- ▪Discreet acoustic floor build-ups in mansion-block conversions
- Thermal Imaging in Central London
- Blower Door / Airtightness Testing in Central London
- Damp, Condensation & Mould Diagnostics in Central London
- Soundproofing & Acoustic Diagnostics in Central London
- Internal Wall Insulation & Retrofit in Central London
- MVHR & Ventilation in Central London
- Indoor Air Quality in Central London
- Why most damp treatments fail — and what actually works.
- Condensation vs damp — how to tell the difference (with measured data).
- What a blower door test actually tells you about your house.
- Thermal imaging — what it can (and can't) see.
- Internal Wall Insulation — how to upgrade a solid wall without causing hidden mould.
- Soundproofing a flat without losing headroom (or your sanity).
Real completed RetrofitIQ projects from Central London and across Greater London — full diagnostic methodology, measurements taken, findings and outcomes.