Skylight Service · New York City
Skylight Waterproofing & Leak Correction in NYC
Systematic investigation and corrective glazing work for skylight water entry, failed perimeter seals, drainage problems, flashing interfaces, and recurring leaks.
Water can travel along framing, curbs, roof membranes, fasteners, insulation, and interior finishes before appearing below the skylight. Effective correction begins by tracing the probable path instead of repeatedly sealing the visible symptom.
Leak-Path Investigation
Look Beyond the Wet Spot
NYC ALL GLASS reviews the skylight as part of the complete roof opening. The investigation may include visible glass edges, caps and pressure plates, frame joints, gaskets, perimeter sealant, weep paths, curb conditions, flashing interfaces, fasteners, roof transitions, and accessible interior evidence.
Weather direction, wind-driven rain, snow and ice, roof drainage, previous repairs, building movement, condensation, and the age of the assembly can change the probable source. Some conditions can be addressed within the glazing scope; others require coordination with roofing, structural, or finish trades.
Common Water-Entry Paths
Six Conditions That Can Affect a Skylight Perimeter
Several failures can create the same interior symptom. The correction should be based on the actual condition rather than a generic layer of sealant.
Glazing Seals & Gaskets
Aged sealant, separated joints, failed gaskets, and compromised glass-edge conditions can admit water into the framing system.
Flashing Interfaces
Discontinuity between the skylight curb, flashing, roof membrane, and adjacent construction can create concealed entry paths.
Frame Joints & Connections
Movement, corrosion, open seams, fastener penetrations, and deteriorated connections can compromise an older skylight assembly.
Blocked or Inadequate Drainage
Restricted weeps, debris, poor slope, ponding, and insufficient drainage can hold water where the system was intended to shed it.
Curb & Substrate Conditions
Deterioration, movement, insufficient height, irregular surfaces, or incompatible materials can undermine perimeter waterproofing.
Adjacent Roofing & Construction
Roof penetrations, membrane failures, parapets, walls, drains, and nearby construction may direct water toward or beneath the skylight.
Corrective Work
Match the Correction to the Failure
The appropriate scope depends on the source, extent of deterioration, compatibility of existing materials, access, safety, and the condition of the surrounding roof opening.
Targeted Resealing
Removal and replacement of failed glazing or perimeter sealant where the substrate and adjoining materials remain suitable.
Drainage & Weep Correction
Cleaning, reopening, or correcting accessible drainage paths when retained water contributes to leakage.
Perimeter & Flashing Coordination
Correction of accessible transitions between skylight framing, curbs, flashing, roof membranes, and adjacent construction.
Glass or Glazing Component Replacement
Replacement may be considered when insulated glass, gaskets, caps, pressure plates, or compatible components have failed.
Frame, Curb or System Replacement
A larger replacement scope may be required when deterioration or incompatibility makes limited correction unreliable.
Coordination With Adjacent Trades
Roofing, structural, insulation, or interior finish work may need to be coordinated when the leak extends beyond the glazing assembly.
Project-Specific Solutions
Corrective Glazing for Residential & Commercial Skylights
NYC ALL GLASS supports property owners, managers, general contractors, architects, and construction teams with skylight leak review and corrective work across New York City.
Perimeter Sealing & Glazing Details
Targeted corrective work where existing framing, curbs, drainage, and surrounding materials remain serviceable.
Flashing, Curb & Roof Transitions
Review and coordination of the junctions where the skylight system connects to the building envelope.
Leak-Correction Process
A Structured Review Before Corrective Work Begins
Collect the History
We review when the leak appears, weather direction, prior repairs, photographs, drawings, access, and project timing.
Inspect Accessible Conditions
Glass, frame joints, caps, gaskets, seals, weeps, curbs, flashing interfaces, and nearby roof conditions are reviewed.
Trace the Probable Path
Interior evidence and exterior conditions are compared to identify likely water-entry routes and contributing factors.
Define the Correction Scope
Targeted repair, component replacement, broader system work, or adjacent-trade coordination is identified.
Prepare the Project
Materials, access, protection, schedule, safety considerations, and responsibilities are coordinated.
Complete & Review
The defined corrective work is performed and reviewed within the agreed glazing and waterproofing scope.
New York Building Conditions
Skylight Leak Correction in a Dense Urban Environment
NYC projects can involve limited roof access, occupied interiors, older assemblies, multiple roof penetrations, previous patching, neighboring structures, parapets, rooftop equipment, and strict scheduling. The repair plan must reflect the actual building—not a generic detail.
Existing Buildings
Aging materials and undocumented prior work can affect the leak path and repair scope.
Occupied Properties
Interior protection, access, noise, debris control, and scheduling require careful coordination.
Complex Drainage
Roof slope, drains, parapets, equipment, and neighboring construction can redirect water.
Trade Coordination
Glazing, roofing, structural, insulation, and finish responsibilities must be clearly separated.
Serving All Five Boroughs
Skylight Waterproofing & Leak Correction Across NYC
Manhattan is our primary service area, with qualifying residential, commercial, and contractor-led skylight projects served across Brooklyn, Queens, the Bronx, and Staten Island.
Waterproofing FAQs
Questions About Skylight Leaks
Leak symptoms can look similar even when their causes are completely different. These answers explain why investigation comes before correction.
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