A leak that appears during sideways rain can involve roof-to-wall junctions, flashings, vents, or exterior wall openings. Ordinary vertical rainfall may not reproduce it. The weather pattern is useful evidence, but it does not identify a single failed component.

What to do next

Keep a weather-and-leak log rather than repeatedly coating the visible roof surface. Ask whether the inspection includes adjacent walls and openings. Where testing is appropriate, request a controlled diagnostic approach that distinguishes roof entry from wall entry.

Related Perkins guidance

Contact Perkins Roofing to discuss your roof and the appropriate next step.