Building Performance Diagnostics comparisons
How whole-house diagnostic surveys compare to traditional surveys, and how the core investigation methods differ.
Diagnostics servicesBuilding Performance Diagnostic vs a Standard Survey
A standard survey tells you the condition of the building; a building performance diagnostic tells you how it actually performs — where it loses heat, leaks air, suffers damp and wastes energy — using instruments rather than visual inspection alone. They answer different questions, and for comfort, energy and damp problems you need the diagnostic.
Read comparisonPAS 2035 Retrofit Assessment vs Building Performance Diagnostics
PAS 2035 is a compliance framework that structures how a retrofit is assessed and delivered; building performance diagnostics measure how the home actually behaves. They are complementary: PAS 2035 provides the process and documentation for funded, compliant retrofit, while diagnostics provide the measured evidence — heat loss, airtightness, moisture — that makes the assessment accurate. A PAS 2035 assessment informed by real diagnostics is far stronger than one resting on standard assumptions.
Read comparisonInvestigation-led Retrofit vs Build First, Diagnose Later
Investigation-led retrofit measures and diagnoses the cause before any work is specified; 'build first, diagnose later' recommends work from visible symptoms and fixes problems afterwards. Most contractors take the second approach, which is why so much remedial work fails to last — the symptom is treated, not the cause. Investigating first costs a little at the start and saves a great deal later, by ensuring the right work is done once, correctly, and verified.
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