Why Do Skylights Start Leaking Around the Frame?

Skylights can start leaking around the frame due to damaged flashing, worn seals, improper installation, or age-related deterioration. Working with experienced skylight repair companies in Lebanon, NH can help identify the leak's source and prevent more extensive roof damage.

A skylight can bring natural light into a home, make rooms feel larger, and improve overall comfort. However, when water appears around the frame, that benefit quickly becomes a concern. Even a small leak can damage drywall, insulation, flooring, and the surrounding roofing system if left unaddressed.

Many homeowners assume the skylight glass is the problem, but leaks often start elsewhere. Knowing the common causes helps homeowners spot issues early and seek professional repairs before minor damage becomes a major expense.

Understanding How Skylight Systems Prevent Water Intrusion

A properly installed skylight is designed to keep water out while allowing sunlight in. Several components work together to create a watertight seal:

• Skylight frame
• Flashing system
• Roofing materials surrounding the skylight
• Underlayment and waterproof barriers
• Sealants and gaskets

When one of these components fails, water can find its way into the home, often appearing around the frame before the actual source becomes obvious.

Damaged Flashing Is One Of The Most Common Causes | Skylight Repair Companies In Lebanon, NH

The flashing around a skylight plays a critical role in directing water away from the roof opening.

Over time, flashing can:

• Corrode due to weather exposure
• Separate from roofing materials
• Become damaged during storms
• Shift as roofing materials expand and contract

When flashing no longer creates a watertight barrier, rainwater can seep beneath roofing materials and travel toward the skylight frame.

In many cases, a professional skylight flashing repair can resolve the issue before water causes significant interior damage.

Also Read: Can a Roofing Company Spot Hidden Summer Roof Risks?

Improper Skylight Installation Can Lead to Leaks

Even high-quality skylights can leak if they aren't installed correctly. Installation problems may include:

Incorrect Flashing Placement

Flashing must be layered properly with roofing materials. If it is installed incorrectly, water can bypass the protective system entirely.

Inadequate Waterproofing | Skylight Repair Companies In Lebanon, NH

Professional installers use underlayment and moisture barriers around skylights. Missing or poorly installed waterproofing materials increase leak risk.

Poor Frame Alignment

A skylight that is not level or properly secured can create small gaps where water enters over time. Many leaks that appear years later can be traced back to installation issues present from the beginning.

Storm Damage May Create New Leak Pathways | Skylight Repair Companies In Lebanon, NH

Strong winds, hail, and heavy rain can damage skylight components without causing immediately visible problems.

Storm-related issues may include:

• Bent flashing
• Cracked glazing
• Loosened fasteners
• Damaged roofing materials nearby

After severe weather, inspect skylights for signs of water intrusion, even if leaks aren't immediately noticeable.

Protect Your Home From Skylight Leaks

A leaking skylight frame often signals that something in the roofing or flashing system needs attention. Common causes include aging materials, installation issues, storm damage, and flashing failures. Acting quickly can prevent water damage, mold growth, and costly structural repairs.

If you notice signs of moisture around your skylight, Guyer & Son Roofing is a trusted skylight repair company in Lebanon, NH, offering professional inspections and reliable repair solutions. 

Serving homeowners throughout the region since 1958, our team brings more than 60 years of roofing experience to every project. Call us today to schedule an inspection and discover why New Hampshire homeowners have trusted us for generations.