Building Performance Diagnostics in Clapham
Clapham is defined by its handsome Victorian terraces — many double-fronted — extensively refurbished with loft conversions, side returns and dug-out basements. These works create new junctions where heat loss, damp and condensation appear, which we diagnose precisely.
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 Clapham.
- 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 Clapham, and how they perform.
The classic Clapham house is a solid-wall Victorian terrace, often deeply remodelled with rear and side-return extensions and basement conversions. Basements in particular introduce risks of cold bridging, ground moisture and inadequate ventilation if not detailed and commissioned well.
- Victorian solid-wall terraces (often double-fronted)
- Houses with dug-out basement conversions
- Rear and side-return extended homes
- Period houses converted into flats
- High-specification refurbishments
Thermal Imaging Surveys in Clapham
In Clapham, thermal imaging checks basement, extension and party-wall junctions where remodelled terraces lose heat or risk condensation.
- 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 Clapham
We measure to confirm whether Clapham basement and extension damp is condensation, ground moisture or a defect.
- 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 Clapham
Solid walls, sash windows, floors and extension junctions lead heat loss across Clapham's terraces.
- 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 Clapham
Blower door testing is valuable on heavily remodelled Clapham homes to find leakage created by works.
- 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 detail and remediate basement, extension and party-wall junctions, and verify comfort and airtightness.
- 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 Clapham.
A technical, building-physics-led specialist in Clapham.
Book a Building Performance Survey in Clapham.
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.