Building Performance Diagnostics in Lewisham
Lewisham is a dense South London borough of Victorian and Edwardian terraces, post-war estates and a large rented sector. Condensation, mould and cold solid-wall homes are the everyday issues, and we resolve them with measurement and remediation.
Investigation only, remedial works, or a complete retrofit — your choice.
RetrofitIQ is not only a diagnostics company. We take projects from first investigation through to verified improvement — and you decide how far we go. Engage us for an investigation on its own, for an investigation plus targeted remedial works, or for a complete building-performance and retrofit project in Lewisham.
- Airtightness improvements & draught-proofing
- Internal wall insulation (IWI)
- External wall insulation (EWI)
- Loft & roof insulation
- Suspended floor & underfloor insulation
- Thermal-bridge detailing & correction
- Extract ventilation & MVHR installation
- Soundproofing & acoustic upgrades
- General building-fabric improvements
The buildings of Lewisham, and how they perform.
Lewisham's terraces are solid-wall with suspended floors and rear additions, heavily converted into flats. Its estates bring concrete-framed construction with thermal bridges, and high-occupancy lets push humidity past the point where mould forms on cold surfaces.
- Victorian & Edwardian solid-wall terraces
- Period houses converted into flats
- Post-war and ex-council estate blocks
- Landlord-let flats and HMOs
- Modern infill apartment developments
Thermal Imaging Surveys in Lewisham
In Lewisham, thermal imaging shows whether mould is driven by cold surfaces, missing insulation or poor ventilation.
- Mapping heat loss through walls, roofs and floors
- Locating missing, slumped or incomplete insulation
- Identifying thermal bridging and cold spots
- Highlighting surfaces at risk of condensation
- Revealing hidden defects behind finishes
Damp, Condensation & Mould Investigations in Lewisham
Our measured condensation and mould investigations give Lewisham owners and landlords a defensible diagnosis and fix.
- Separating condensation from penetrating and rising damp
- Finding mould behind wardrobes, furniture and in cold corners
- Measuring relative humidity, surface temperature and dew point
- Assessing ventilation provision and moisture sources
- Combining thermal imaging with a building-physics review
Heat Loss & Energy Efficiency Surveys in Lewisham
Solid walls, floors and lofts lead loss in the terraces; floor-slab bridges lead it in the estates.
- Pinpointing where heat escapes — walls, floors, roofs, windows and doors
- Setting fabric-first retrofit priorities in the right order
- Quantifying the impact of each potential improvement
- Assessing heat pump readiness where relevant
- Producing a clear, costed improvement plan
Blower Door Testing & Airtightness in Lewisham
Blower door testing quantifies draughts across Lewisham's converted and let stock.
- Measuring air leakage and uncontrolled heat loss (ACH₅₀)
- Locating draughts with smoke tracing
- Identifying leakage paths through floors, lofts and services
- Guiding targeted airtightness improvements
- Verifying performance before and after retrofit works
Retrofit & Building Physics Advice
We can install effective ventilation, insulate cold surfaces and verify that humidity and comfort improve.
- A fabric-first, Passive House-informed approach
- Retrofit advice aligned with PAS 2035 principles
- Internal and external wall insulation risk assessment
- Thermal-bridge reduction and condensation-risk modelling
- A coherent ventilation strategy to protect health and fabric
Common building performance problems in Lewisham.
A technical, building-physics-led specialist in Lewisham.
Book a Building Performance Survey in Lewisham.
Request a thermal imaging, damp, condensation or heat loss investigation — or speak to us about a full retrofit. We diagnose by measurement and, where you want it, carry out and verify the works.