Diagnose before selecting a repair
A repair should address the route water takes, not simply the place where it appears indoors. Start with the timing and position of the symptom, then examine likely entry points upslope and nearby: vents, plumbing boots, wall flashing, valleys, ridge details, roof edges, fasteners, seams, or damaged covering. The surrounding material also matters because a small opening in a deteriorated field may not support a lasting isolated fix. A useful scope names the component, the area to be opened, compatible replacement materials, and how the restored section will tie into the existing roof. It should also state what evidence would cause the plan to expand.
- Map the interior symptom to the roof plane and record whether wind or thawing changes it.
- Inspect penetrations, transitions, and drainage routes around the suspected source.
- Require a written limit for the repair plus a process for documenting concealed deterioration.
