PenetrationsPriority topic 10 of 33

Skylight flashing and curb

A roof window assembly that relies on a curb or deck frame, underlayment, flashing kit, and compatible roof covering transitions.

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Normal function

It admits daylight while the curb/frame and flashing direct rain around the opening.

What a homeowner may notice

Water at the interior trim, fogged glazing, cracked seals, rust, debris at the upslope side, or damaged step flashing.
Leak only during wind-driven rain or when a specific roof plane is wet.
Old skylight without a matched manufacturer flashing kit.
Deteriorated curb, deck, or surrounding shingles.

Professional inspection

Separate glazing/condensation from roof leakage. Inspect the upslope diversion, side flashing, sill flashing, membrane, curb, fasteners, and attic framing. Confirm the skylight model and installation instructions before pricing.

Repair or replacement path

Use the manufacturer flashing kit or rebuild the curb/deck detail with compatible membrane and metal. Replace the skylight when glazing, frame, or curb condition makes repair unreliable.

Typical materials and equipment

Flashing kit, membrane, step flashing, replacement shingles, compatible sealants, curb lumber if needed, and interior protection.

When to act

Persistent skylight leakage should be addressed before insulation and framing stay wet.

Billing unitEach skylight plus linear foot/perimeter and roof area opened.Invoice language should state what was measured.

Planning range$650-$2,400 repair planning range; replacement varies by unit and interior finishCharlotte-area guidance, not a quote.

Realistic exampleOne accessible curb-mounted unit with sound framing may be a one-day flashing rebuild; interior drywall/paint and a new skylight are separate line items.Actual scope changes after inspection.

Crew and time2 techs; one day, longer with interior restoration.Weather and access can extend production.

What moves the price

Curb vs deck mount, size, roof pitch, glazing/frame condition, interior finish, access, manufacturer kit, and hidden rot.

Sources for this topic

GAF: Understanding roof flashing - Current manufacturer education on flashing at walls, chimneys, penetrations, skylights, eaves, and rakes.
2024 NC Residential Code: Roof Assemblies - Primary code reference for roof coverings, flashing, drainage, ventilation, reroofing, and material installation requirements.
Best Roofing Now: Charlotte roof repair cost guide, 2026 - Local contractor-market planning ranges for common repair types such as flashing, pipe boots, and low-slope patches.

Local help, without pressure

Need a professional assessment?

A qualified Fix it Fast CLT technician can inspect the concern, explain practical options, and provide a written estimate valid for at least 14 days.

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