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

Start with what it resembles.

Choose the closest visual fingerprint. Then add location, timing and weather in the Clue Engine. Resemblance alone never confirms a cause.

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All 32Attic 2Coatings 2Concrete 2Cracks 3Dark marks 2Deposits 2Drainage 2Electrical 1Floors 2Foundation 2Odors 2Sounds 3Stains 2Thermal 2Windows 3
Attic

Broad attic frost

Distributed frost on roof sheathing commonly follows indoor air leakage.

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Attic

Snow localized near an attic vent

A local deposit after wind-driven snow suggests exterior entry.

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