Real RetrofitIQ project

Property Assessment & Costed Improvement Report — Whole-Flat Diagnostic Survey

Verified Checkatrade customer · IG8, London · March 2026

Property Assessment & Costed Improvement Report — Whole-Flat Diagnostic Survey

Verified Checkatrade customer · IG8, London · March 2026
Property AssessmentBuilding DiagnosticsThermal ImagingCosted ImprovementsBuilding Performance Strategy
  1. Step 01
    Customer problem

    The customer needed a structured, evidence-based assessment of their whole flat — not a tick-box survey — to understand exactly where heat, comfort and indoor-environment problems were originating, and to receive a fully-costed schedule of recommended improvements they could prioritise and budget against.

  2. Step 02
    Investigation / diagnostic method

    On-site Home Health Diagnostic Survey of the flat combining: visual inspection room by room, FLIR thermal imaging of all critical surfaces (walls, ceilings, lintels, reveals, floor junctions, service penetrations), surface temperature and humidity readings, defect identification against building-performance criteria, and conversion of the findings into a costed improvement schedule.

  3. Step 03
    Findings

    Multiple thermal defects identified and measured across the flat: localised thermal bridges at wall/ceiling corners (cold spots down to 19.1 °C against room baseline ~21 °C), pronounced cold bands along door-head lintels (16.8 °C → 29.4 °C across the same image), a cooler perimeter band at the wall/floor junction (evidence of a heat-loss path through the slab edge), and uniformly cool internal wall surfaces giving an accurate baseline for the costed-improvement comparison.

  4. Step 04
    Solution provided

    A thorough written diagnostic report was delivered covering each defect, the building-science reason for it, and a fully-costed schedule of proposed improvements ranked by impact and cost. The recommendations covered thermal-bridge mitigation, perimeter detailing, surface-temperature improvement and a wider Building Performance Strategy the client can implement in stages.

  5. Step 05
    Outcome achieved

    The customer received a proper, evidence-based assessment with full costings for every proposed improvement — exactly what they were looking for. They left a 5-star Checkatrade review describing the report as 'very thorough' with full costings for all proposed improvements, and a glowing recommendation.

Real project photos

Photos taken on site during the Verified Checkatrade customer project — preserved with customer consent.

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