Cold-climate intelligence for highly insulated homes, attics, crawl spaces, mechanical ventilation and seasonal moisture transport.
Long heating seasons, very low outdoor temperatures and large winter vapour-pressure differences.
Very coldCold winters amplify thermal bridges, stack effect and condensation risk at envelope weak points.
ColdHeating-season moisture transport, basements and seasonal drainage frequently shape symptom timing.
MarineFrequent wind-driven rain, mild temperatures and long damp periods make drying capacity and detailing critical.
Timber or masonry structures, ventilated foundations and later layered insulation upgrades.
1940–1975Rapid construction, vented attics, crawl spaces or early slabs and mechanical exhaust.
1976–1999Heavier insulation, tighter envelopes and evolving vapour and ventilation practice.
2000–presentHighly insulated, airtight assemblies with mechanical ventilation and complex service penetrations.
The regional layer changes labels without duplicating the underlying symptom, cause or component.
Open terminology map →Indices support early comparison and handoff wording. They never replace local pricing or a professional quote.
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