12 complete symptom paths42 guides and 60 questions in each1,460 Grade A articlesOne searchable, connected knowledge library140 official sourcesEvidence context with explicit limits
Regional House DNA

The year changes the likely assembly.

Choose a regional construction era to see common systems, priority clues and the first context checks.

NZ · Before 1940

Early timber New Zealand homes

Raised timber floors, weatherboard cladding and simple roof forms.

subfloor damppile movementroof leakage
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NZ · 1940–1979

Post-war New Zealand homes

Timber framing, fibre-cement or weatherboard cladding and limited insulation.

subfloor ventilationgutter overflowwindow leakage
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NZ · 1980–2004

Complex-cladding transition era

More complex forms and changing cladding practice, requiring careful weathertightness interpretation.

cladding interfacesdeck junctionswindow flashings
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NZ · 2005–present

Contemporary New Zealand homes

Drained cavities, improved insulation and evolving ventilation practice.

cavity drainageextract ventilationroof complexity
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