What may be original
- Region-specific envelope and service systems
- Later retrofit layers should be recorded separately
United States House DNA
Energy-transition homes
Increasing insulation and tighter windows, mixed mechanical systems and extensive renovation layering.
1970–1999
What deserves attention
- air leakage
- duct condensation
- window replacement effects
- roof underlayment
Reduce uncertainty first
- Confirm original construction era
- Record major renovations
- Compare symptom timing with weather and system use
Add to House DNA
Open My House →Original era is only the start.
Record later insulation, windows, roof, ventilation and service replacements in My House before relying on era assumptions.
