Roof flashing leaks around chimneys, walls and valleys
Learn why roof intersections need careful flashing details and how to compare flashing repair proposals without relying on a sealant-only explanation.
Understand what flashing does
Flashing helps direct water at places where a roof meets a wall, chimney, opening or another roof plane. Its function depends on how pieces overlap and connect with the surrounding roofing and wall assembly, not simply on the presence of a visible strip of metal.
Water stains near a chimney do not prove that the flashing alone has failed. Masonry, caps, wall coverings and condensation may also require investigation.
Ask for evidence at the intersection
Request photographs and a clear explanation of the suspected water path. Ask whether the evaluation includes step flashing, counterflashing, valleys and the surrounding material as applicable to the roof.
Some details are concealed until materials are removed. A sound estimate identifies that uncertainty and explains how additional findings will be documented and priced before extra work is authorized.
- Which components will be reused and which replaced?
- How will new work connect to existing roofing and wall layers?
- Does a chimney issue require a masonry specialist?
Distinguish a temporary seal from a repair
A sealant application can have a legitimate role in a specified system, but it is not a universal substitute for correctly integrated flashing. Ask what the material is intended to do and whether it is temporary or permanent.
Discuss compatibility, expected maintenance and access needed to complete the work. Avoid comparing a surface patch with a flashing replacement as though they were the same project.
Put the scope in writing
The proposal should identify affected locations, material removal, replacement components, restoration of adjacent surfaces and cleanup. Ask how interior damage, concealed decking and warranty exclusions are handled.
Do not climb onto the roof to inspect the detail yourself. Use photographs and a professional explanation to compare proposals.