Roof water paths: drainage versus hidden entry investigation session

Roof water paths: drainage versus hidden entry

Record the first visible change, the rain direction, the delay before wetting, and every roof detail uphill from the exit point.

Browser-local draftNo session answers are sent to the server. Evidence balanceScores organize observations; they are not probabilities. No repair authorizationStop signals override the ordinary workflow.

Freeze the evidence

Record the condition before interpreting it.

Observed at Weather / equipment / water-use state First visible, audible or measurable change Location, direction and delay

Evidence ledger

Mark what raises or weakens each route.

Leave unknown items unmarked. Contradictory observations are useful evidence.

Roof covering or flashing entry

Rain crosses a roof detail and travels along decking, underlay or framing before it appears indoors.

Raises fit +2 eachOnly changes during rainStronger in wind from one directionDelay between rain and interior wetting

Lowers fit −2 eachRepeats during dry weatherTracks fixture use instead of rain

Notes for this route

Plumbing or condensate source above

A pipe, fixture, drain or condensate route wets the same ceiling area independently of weather.

Raises fit +2 eachRepeats with fixture or equipment useCan occur in dry weatherMoisture starts below a service route

Lowers fit −2 eachOnly occurs in a narrow wind and rain pattern

Notes for this route

Stored water released after the event

Insulation or a concealed cavity temporarily stores water and releases it after the exterior event has ended.

Raises fit +2 eachLong delay before drippingDrip continues after rain stopsWetting expands slowly

Lowers fit −2 eachImmediate wetting at a visible penetration

Notes for this route

Decision points

Change one condition at a time.

An answer changes investigation order; it does not prove a concealed condition.

Can the symptom be reproduced during dry weather by using plumbing or HVAC equipment above?

YesNoUnknown

If yes: Move plumbing or condensate routes ahead of the roof pathway.

If no: Keep weather-driven entry as the leading family and map wind direction and delay.

Observed answer and evidence

Does the first wet edge align with an uphill penetration, valley, sidewall or flashing transition?

YesNoUnknown

If yes: Inspect that detail and the concealed downhill travel route.

If no: Widen the search to deck seams, fastener lines and alternate sources above.

Observed answer and evidence

Safety interlock

Stop signals override scoring.

Mark the stop state when any listed boundary is present. Do not create a better clue by increasing exposure.

Do not walk a wet, steep or fragile roof.
Stop if water is near lights, wiring or energized equipment.

A stop signal is presentPause ordinary investigation and arrange an appropriate competent or emergency response.Safety note

Current conclusion

Explain what changed the ranking.

Leading pathway and why Strongest competing pathway Evidence still missing Smallest safe next action / handoff

Roof water paths: drainage versus hidden entry

Record the condition before interpreting it.

Mark what raises or weakens each route.

Roof covering or flashing entry

Plumbing or condensate source above

Stored water released after the event

Change one condition at a time.

Can the symptom be reproduced during dry weather by using plumbing or HVAC equipment above?

Does the first wet edge align with an uphill penetration, valley, sidewall or flashing transition?

Stop signals override scoring.

Explain what changed the ranking.

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