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

Diagnostic guides

Practical workflows adapted to specific areas and investigation goals.

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guide 80documentation 61editorial-1.8 48evidence-first 48homeowner-guide 48self-help 48step-by-step 48attic 16basement 15roof 15workflow 13checking-indoor-humidity-patterns 10comparing-condensation-with-leakage 10documenting-a-water-stain 10investigating-rain-linked-symptoms 10mapping-a-musty-odor 10preparing-a-professional-handoff 10tracking-a-crack-over-time 10
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Self-help workflow: an interior leak during snowmelt near the eaves

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Self-help workflow: water marks below a roof valley

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Self-help workflow: a ceiling stain that appears after wind-driven rain

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Self-help workflow: a skylight drip that begins during thaw

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Self-help workflow: a stain near a chimney after rain

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Self-help workflow: an exterior wall stain below a gutter

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Self-help workflow: a roof leak that appears hours after rain

A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.

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Checking indoor humidity patterns in the roof

Log humidity and temperature through occupancy and weather changes. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Comparing condensation with leakage in the roof

Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Documenting a water stain in the roof

Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Investigating rain-linked symptoms in the roof

Relate wind, intensity and delay to the building geometry. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Mapping a musty odor in the roof

Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Preparing a professional handoff in the roof

Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Tracking a crack over time in the roof

Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.

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Verifying a repair in the roof

Test the original trigger and record whether the symptom returns. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.