How to Build a Roof-Leak Water-Path Record

Start with the first reliable observation

Write down the first place water became visible, the time, and whether it appeared during rain, after rain, or only with wind. Mark the location on a simple room sketch. Include nearby exterior walls, roof changes, skylights, vents, or equipment if you can identify them safely from the ground. Do not assume the point directly above the stain is the entry point.

Photograph the symptom from a safe floor position. Avoid sagging finishes, active drips near lights, and wet electrical devices. A useful photo set includes one wide view that shows the room and one closer view that shows the affected area. Keep the original image dates.

Connect the inside record to roof features

Give the contractor the room sketch and exterior orientation. Ask the inspection record to identify roof features uphill and beside the symptom, including transitions, penetrations, valleys, drainage paths, and earlier patch edges. The goal is a reasoned water-path explanation, not a promise based only on where the stain appeared.

Ask which observations are confirmed and which are working theories. If testing or limited opening is proposed, the scope should explain the area, protection, restoration responsibility, and stopping point before work begins.

Keep a repair decision log

Record the suspected entry location, the proposed correction, and why that correction matches the observed path. Save photos of the exposed condition when available, the repaired condition, and the surrounding area. Note exclusions such as concealed damage or adjacent systems that were not opened.

After later rain, add a dated entry even if no moisture appears. A dry observation is useful, but it does not prove every weather condition has been repeated. If the symptom returns, the log keeps the next investigation from starting with another blind patch.

• What observation supports the suspected entry point?
• What adjacent areas were checked?
• What condition would require a change in scope?
• What should the owner monitor after repair?

Prepare the next decision

End each entry with a responsible person and next trigger. The trigger might be contractor review of a photo, approval for a limited opening, or a new observation after comparable weather. Avoid an open-ended note such as “watch leak.” State what area to observe and who receives the report.

If several rooms or roof features are involved, create separate location identifiers. This keeps a later dry area from being used to close a different active condition.