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

Cold floor near an exterior wall

A narrow cold band can reflect air leakage, missing insulation, thermal bridging or a cold foundation edge.

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

Map the shape

A line along the wall suggests a different pathway than one isolated patch. Compare wind and heating operation.

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