Water around a commercial skylight may involve the skylight assembly, its connection to the roof, surrounding drainage or condensation. The location of the drip is a starting point, not a diagnosis. Identify the unit and record when water appears so the provider can evaluate the relevant components before recommending resealing or replacement.
Keep people clear of affected interiors and report active entry promptly. Do not send staff onto a wet roof, lean on a skylight or use its surface as a working platform. OSHA's fall-prevention guidance identifies skylights and roof openings as serious fall hazards requiring appropriate protection.
Identify the skylight before choosing the repair
Look for manufacturer, model and installation information in the building's existing records. Note whether the complaint concerns one unit or several, and whether there has been recent roofing or skylight work. Use floor-plan or bay references to connect interior observations to the correct opening.
Skylight types and roof connections differ. Ask the provider to identify the assembly and the repairable components rather than applying a familiar residential detail to an unidentified commercial unit. The proposed scope should also identify who is responsible for the connection between roofing and skylight work.
Separate rain-entry clues from condensation clues
Record whether water appears during rain, after rain or in dry weather. Note whether moisture is visible on an interior surface and whether the pattern changes with building operation. These observations help define the review; they do not prove the cause.
The VELUX modular-skylight maintenance guide explains that interior humidity and temperature differences can create condensation that may drip. It also addresses keeping water paths around the unit clear. Those principles illustrate why a complete assessment considers more than an exterior sealant line; the installed model's own instructions govern maintenance.
| Observation | Useful question |
|---|---|
| Water appears with rain | Which skylight, roof-flashing and adjoining drainage details need review? |
| Water also appears when dry | Should condensation or another interior moisture source be evaluated? |
| One of several units is affected | What differs about that unit's condition, surroundings or service history? |
| Complaint followed recent work | Which details changed, and what completion records are available? |
Give the inspector a complete question
Ask for an assessment that distinguishes the skylight components from the curb or roof opening and surrounding roof connection. Request findings with photographs and location references. If the inspection does not establish the source, the report should say what remains uncertain and what investigation is proposed next.
Provide earlier leak reports, warranty information and any previous resealing or replacement proposals. Do not assume an old repair proves the same component is failing again. Review our commercial roof leak detection guide when recurring symptoms need a more defined investigation.
- Identify the unit, affected interior and observed timing.
- Separate confirmed defects from possible causes.
- Clarify whether roofing, skylight or building-system specialists are needed.
- Identify any limitations caused by weather or access.
- Request the next step and the approval needed to proceed.
Compare repair and replacement on scope
Ask why the proposed work fits the identified condition. A component repair, roof-connection repair and complete skylight replacement are different scopes. Compare what each includes, who handles adjoining roofing, what interior work remains and what warranty conditions apply.
Do not approve blanket coating or resealing of an unidentified assembly as a substitute for diagnosis. Where the existing unit's documentation is unavailable, have the provider explain how product identification and repair suitability will be resolved.
Brady can discuss commercial roof leak repair and coordinate the appropriate scope and specialist support. Include other property concerns when requesting facility inspections in Ontario. Our water-intrusion guide covers situations where the apparent roof leak may have another source.
Common questions
Does a leaking skylight always need replacement?
No conclusion should be drawn before assessment. Ask whether the issue lies in a serviceable component, the roof connection, condensation or a condition that supports replacement.
Can condensation drip from a skylight?
Yes. Manufacturer guidance describes condensation under certain humidity and temperature conditions. Dry-weather occurrence is useful information for the investigator, not proof of the cause.
Can maintenance staff stand on a skylight to inspect it?
No. Treat skylights and roof openings as fall hazards. Arrange qualified access and appropriate protection rather than using the unit as a standing or working surface.
Who handles the roofing around a replacement skylight?
Assign that responsibility explicitly in the approved scope. The skylight and roofing providers should coordinate the connection and applicable requirements before work starts.
Request assessment of a commercial skylight leak or call 909-293-9861. Include unit records and safe interior photographs if available.