Area dossier

Roof

Coverings, flashings, penetrations, drainage and wind-driven water.

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Urgency profileInformational

Use timing, location and checks to separate competing explanations.

The first weather boundary

Explore roof symptoms by rain direction, snow, drainage, age and construction detail.

Observe→Distinguish→Control source→Verify

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