Old buildings need retrofitting because

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Poor(ly) old buildings

Marked choice: “They are usually poorly insulated and not airtight.” A stone pile from 1923 leaks heat the way a colander leaks soup. Retrofitting isn’t an aesthetic indulgence; it’s triage for structures haemorrhaging energy. Seal the envelope, add insulation, watch the kWh meter calm down. Everything else—faulty kitchens, outdated façades—are real but secondary. Energy codes don’t care how cute the cornices are; they care about U-values and infiltration rates. Less romance, more R-value🪦