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

Surface condensation

Moist indoor air reaches a surface below its dew point and deposits liquid water.

Urgency profileInvestigate
Use timing, location and checks to separate competing explanations.

Temperature and moisture meet

Surface temperature, airflow and moisture generation all matter.

ObserveDistinguishControl sourceVerify
Living dossierPublished knowledge is connected and improved as new cases, images and outcomes are added. Updated 2026-07-20.