Independent diagnostics that de-risk the decision — before works are specified.
We support architects, agents, managers, landlords, housing associations and project teams with measured building-performance evidence across London, Greater London, East London, Essex, Kent, Surrey, Hertfordshire. Investigation, diagnosis and remedial strategy — by a Certified Passive House Designer.
Building physics, translated for the way you work.
For Architects
We give architects and design teams the measured building-physics evidence to specify with confidence — pre-design surveys, hygrothermal modelling and post-works verification, by a Certified Passive House Designer.
For Estate Agents
When a survey flags damp, mould or cold rooms, a transaction stalls. We provide fast, independent, measured diagnostics that establish the real cause — so vendors, buyers and agents can act on evidence, not worst-case assumptions.
For Property Managers
Recurring damp, mould and condensation complaints across a managed portfolio cost time, money and goodwill. We diagnose the real cause once, properly — so the remedy works the first time and the file is defensible.
For Landlords
Damp and mould are now a compliance issue as much as a maintenance one. We give landlords an independent, measured diagnosis of the real cause — so remediation works first time and your obligations are demonstrably met.
For Housing Associations
Social landlords face the sharpest scrutiny on damp and mould and the biggest retrofit programmes. We provide the independent, measured evidence to respond properly to complaints and to de-risk fabric upgrades at scale.
For Retrofit Projects
Retrofit done badly imports damp. We provide the measured baseline, the moisture-safe design discipline and the verification that turn a fabric upgrade into a provable improvement rather than a hidden liability.
For Refurbishment Projects
A major refurbishment is the one chance to fix heat loss, damp risk, air leakage and noise cheaply — while the structure is exposed. We diagnose and design those improvements in, before they are plastered over for another generation.
Investigate → Diagnose → Design → Remediate → Verify
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, an investigation plus targeted remedial works, or a complete building-performance and retrofit project.
A measured diagnosis — thermal imaging, blower door testing, moisture and building-physics analysis — with a clear, costed report you can act on however you choose.
We investigate, then carry out targeted remedial works — airtightness, insulation, ventilation or thermal-bridge corrections — and verify the result.
A full fabric-first, Passive House-informed retrofit from diagnosis through design, installation and verification — one accountable team, one point of responsibility.
- 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