Skylight Repair & Replacement on Long Island

Skylight Repair & Replacement on Long Island

A leaking skylight can cause serious damage to your ceiling, insulation, drywall, and even your home's structural framing if left unaddressed. On Long Island, where nor'easters, heavy rains, and freeze-thaw cycles put constant stress on rooftop penetrations, skylight failures are one of the most common — and most misdiagnosed — roofing issues homeowners face.

ERS Roofing & Siding specializes in skylight leak diagnosis, repair, and replacement across Nassau and Suffolk County. We don't guess — we identify the exact source of the leak and fix it right, whether that means resealing, reflashing, or replacing the entire unit.

Common Skylight Problems on Long Island

Most skylight issues fall into a few categories. Understanding what's actually causing the leak is the most important step — and the one most contractors get wrong.

Flashing Failure

The flashing around a skylight is the metal (or in some cases, rubberized membrane) system that creates a watertight seal between the skylight frame and the surrounding roof surface. Over time, Long Island's temperature swings cause flashing to expand and contract, eventually breaking the seal. This is the #1 cause of skylight leaks and is often repairable without replacing the skylight itself.

Seal Deterioration

The weatherproof seals around the skylight glazing degrade over time, especially under UV exposure and coastal salt air. When seals fail, condensation forms between panes (on dual-pane units) and water can enter around the frame. Seal replacement is a targeted repair that can extend a skylight's life by years.

Cracked or Damaged Glazing

Hail, fallen branches, and thermal stress can crack skylight glass or acrylic domes. A cracked skylight needs prompt attention — even a hairline crack will let water in during the next rain. Depending on the unit, we can replace just the glazing or recommend a full skylight replacement.

Improper Original Installation

Many skylight leaks trace back to shortcuts taken during the original installation — missing or undersized flashing, inadequate sealing, or poor integration with the surrounding roofing materials. If your skylight has leaked intermittently since it was installed, the installation itself is likely the problem.

Our Skylight Repair Process

• Free inspection & leak diagnosis — we examine the skylight from both the roof and interior to pinpoint the exact leak source
• Honest assessment — we tell you whether a repair or replacement makes more sense for your situation and budget
• Flashing repair or replacement — if flashing is the issue, we remove the old flashing and install a proper step-and-counter flashing system
• Seal replacement — deteriorated seals are removed and replaced with professional-grade sealants rated for rooftop UV exposure
• Skylight replacement — when the unit needs to be replaced, we install a new Velux or equivalent skylight with a complete flashing kit
• Interior finishing — we address any water-damaged drywall, trim, or paint around the skylight opening
• Warranty & follow-up — all work is backed by our workmanship guarantee

Velux Skylight Specialists

Velux is the world's leading skylight manufacturer and the most common brand installed in Long Island homes. We carry Velux replacement units, flashing kits, blinds, and accessories. Whether your Velux skylight needs a simple seal repair or a full unit swap, we have the parts and experience to handle it.

We also work with Fakro, Wasco, and other major skylight brands. If your skylight is an older or discontinued model, we can usually find a compatible replacement that fits the existing roof opening.

When to Repair vs. Replace Your Skylight

Repair makes sense when: the skylight frame and glazing are in good condition, the leak is caused by flashing or seal failure, and the unit is less than 15–20 years old.

Replacement makes sense when: the skylight is older than 20 years, the frame is warped or cracked, you're seeing persistent condensation between panes, or you're already getting a roof replacement (the best time to upgrade skylights).

Why Choose ERS for Skylight Repair on Long Island

• Accurate leak diagnosis — we find the real problem, not just the symptom
• Repair-first approach — we won't sell you a replacement if a repair will fix it
• Velux flashing kits and replacement units in stock
• Licensed NY State contractor, fully insured
• Serving Nassau and Suffolk County — free estimates
• Interior damage repair included when needed