Skylight leaks: flashing repair or skylight replacement?
Understand the difference between skylight condensation, roof flashing leaks and unit problems, with questions to compare repairs and replacement.
Identify when the moisture appears
A stain or drip near a skylight can relate to the roof opening, flashing, the unit itself or interior condensation. Note whether it happens during rain, snowmelt or cold weather without precipitation, but do not treat timing alone as a diagnosis.
Photograph accessible interior surfaces and record changes. Keep away from unstable ceiling material and electrical fixtures affected by moisture.
Inspect the unit and the roof connection
Ask the contractor to identify the skylight model or assembly when possible and explain the condition of its glazing, seals, curb and surrounding roof details. The flashing should suit both the skylight and the roofing material.
Replacing the unit does not automatically resolve a poorly detailed roof opening. Likewise, new flashing may not correct a failed component within the skylight. Ask which observations support the recommended work.
- Is the suspected source the unit, its flashing or condensation?
- Are compatible replacement parts or flashing kits available?
- What investigation remains necessary?
Compare complete scopes
A skylight proposal may include roofing work, interior finish repair, access equipment and replacement of damaged concealed material. Confirm what is included rather than assuming the quoted unit price covers the entire project.
If roof replacement is also planned, ask how the work will be coordinated and what keeping or replacing the skylight means for the roof and skylight warranties.
Confirm safety and approvals
Do not step on skylights or approach them on an unprotected roof. A skylight may not support a person’s weight, and roof access requires suitable precautions.
Check project-specific permit requirements with the responsible local department. Confirm the contractor’s relevant experience and current insurance directly before proceeding.