Natural light can transform a room. Skylights brighten dark spaces, improve aesthetics, and make homes feel more open and inviting. However, when a skylight begins to leak, that beautiful feature can quickly become a homeowner’s nightmare.
At Courtney Roofing, we regularly respond to calls from homeowners who notice staining on ceilings, bubbling drywall, peeling paint, or even mold growth around skylights. In many cases, the leak has been developing for months before visible damage appears inside the home.
A recent project serves as a perfect example of why addressing skylight leaks early with roof inspections in London is so important.
The Warning Signs Were Inside
The homeowner first noticed discoloration and damage around a recessed ceiling area beneath their skylight. Over time, the drywall began to sag, paint started peeling, and moisture stains became increasingly visible.
By the time the damage was apparent indoors, water had already been finding its way into the roof assembly for an extended period.
Many homeowners assume the skylight itself is defective. While this can happen, the skylight is often only part of the problem.
The real issue is frequently found in the roofing materials and flashing surrounding the skylight.
What We Found on the Roof During Our Roof Inspection
Once our team inspected the roof, the source of the leak became much clearer.
The roofing membrane surrounding the skylight had deteriorated significantly. Cracks had formed in the surface, allowing water to penetrate beneath the waterproof layer. Areas of the membrane showed signs of aging, separation, and previous patchwork repairs that were no longer effective.
When water enters through these compromised areas, it doesn’t necessarily drip directly below the opening. Instead, it can travel along structural members, insulation, and framing before eventually appearing inside the home.
This often makes skylight leaks difficult to diagnose without a thorough roof inspection.
Why Skylight Leaks Are So Problematic
Unlike many other roofing components, skylights interrupt the roof’s surface.
Every penetration through the roof requires careful waterproofing. The transition between the skylight frame and the roofing system must remain watertight despite constant exposure to:
- Rain
- Snow accumulation
- Ice formation
- Freeze-thaw cycles
- UV exposure
- Wind-driven water
In Southwestern Ontario, these conditions can be especially demanding. Over time, flashing materials, sealants, and roofing membranes naturally age and lose their effectiveness.
Once water finds a pathway, even a small opening can allow significant moisture intrusion.
The Hidden Damage You Can’t See
One of the biggest concerns with skylight leaks is that visible ceiling damage is often only the tip of the iceberg.
Water can saturate insulation, reducing its effectiveness and increasing energy costs.
Wood framing can remain damp for extended periods, creating conditions that support mold growth and wood deterioration.
Electrical components located near the leak can also become vulnerable.
By the time drywall begins to bubble or stain, moisture may have already affected multiple layers of the roof assembly.
This is why prompt investigation is critical whenever a homeowner notices signs of water intrusion.
The Repair Process
For this project, our team removed the failed roofing materials surrounding the skylight and addressed the compromised areas of the roof system.
New waterproofing materials were installed to create a durable, watertight seal around the skylight assembly. Particular attention was paid to transitions, seams, and drainage paths to ensure water would be directed away from the skylight as intended.
Once the roof repairs were complete and the leak source eliminated, interior restoration could begin.
Damaged drywall was removed and replaced. The ceiling was repaired, refinished, and repainted to restore the appearance of the space.
The result was a clean, seamless ceiling with no evidence of the extensive water damage that had previously existed.
Repair or Replace the Skylight?
This is one of the most common questions homeowners ask.
The answer depends on several factors:
- Age of the skylight
- Condition of the glazing
- Condition of the frame
- Energy efficiency
- Extent of surrounding roof damage
If the skylight itself remains in good condition, repairs to the roofing system and flashing may be sufficient.
However, if the skylight is approaching the end of its service life, replacement may be the more cost-effective long-term solution.
A professional inspection can help determine the best approach.
How to Prevent Future Skylight Leaks: Roof Maintenance Service and More
Regular roof maintenance service is the best defence against costly repairs.
Homeowners should watch for:
- Water stains on ceilings
- Bubbling paint
- Soft drywall
- Condensation between skylight panes
- Drafts around skylights
- Visible roof deterioration near skylights
Annual roof inspections can often identify small issues before they develop into major leaks.
At Courtney Roofing, our RoofCheck® program is specifically designed to catch these types of problems early, helping homeowners avoid expensive interior repairs.
Don’t Ignore the Early Signs
A leaking skylight rarely fixes itself.
What begins as a small crack in a roofing membrane or flashing detail can eventually lead to damaged insulation, mold growth, drywall replacement, and significant repair costs.
If you’ve noticed staining, bubbling, or moisture around a skylight, now is the time to investigate.
The sooner the source is identified and repaired, the more likely you are to avoid extensive interior damage and costly restoration work.
Contact Courtney Roofing for Roof Inspections and Maintenance in London, Ontario
If you suspect your skylight may be leaking, contact Courtney Roofing today to schedule a professional roof inspection. We’ll identify the source of the problem and recommend the most effective solution to protect your home.