How to Maintain Skylights: Cleaning, Seals, and Leak Prevention

Skylights are like the eyes of your roof—letting in natural light, offering a glimpse of blue sky, and transforming a drab room into a bright, inviting space. But like any window, they need care. Neglecting maintenance can turn your daylight dream into a leaky hassle, leading to water damage, energy loss, or even costly repairs.

At Robert Foley Roofing, we know both homes and businesses rely on skylights for comfort and style. With proper upkeep, you can keep those panes sparkling and sealed—while avoiding headaches down the road.

Why Skylight Maintenance Matters 🌤️

A skylight is more than just glass overhead. It's a portal between your building and the elements. When well maintained, it brightens interiors and boosts property value. But if ignored? Moisture sneaks in. Drafts creep through. Over time, minor cracks or worn seals can cause water stains, ceiling sag, or even structural rot. A small leak above your head can grow like a weed through a sidewalk.

Regular skylight care:

• Preserves natural light and clarity
• Prevents sneaky leaks and water spots
• Reduces heating and cooling costs
• Extends roof and skylight lifespan
• Protects insulation and interior finishes

Industry guidelines from the National Roofing Contractors Association (NRCA) and the International Building Code both stress the importance of routine inspection and seal management for skylights. It's not just about looks—it's about keeping your roof system strong.

How to Clean Skylights Safely

Cleaning a skylight isn't like wiping down a kitchen counter. It takes planning and care. Safety always comes first, especially if you're working at height or on a sloped roof.

Before you start:

• Use a sturdy ladder and non-slip shoes.
• Never lean out a window or overreach.
• Enlist a spotter for two-story homes or steep roofs.
• Avoid cleaning in wet or windy conditions.

Cleaning steps:

1. Dust and Debris Removal: Use a soft broom or handheld vacuum to brush away loose leaves, twigs, and dust from the glass and frame.
2. Gentle Washing: Mix a mild soap with lukewarm water. Apply with a microfiber cloth or soft sponge. Avoid harsh chemicals or abrasive pads.
3. Rinse and Dry: Gently hose off suds (avoid blasting water at seals). Wipe with a squeegee or lint-free towel for a streak-free finish.
4. Check for Stains or Mold: Spot any cloudy patches or green spots? A mixture of vinegar and water can help cut through residue.

Pro tip: For flat roofs or commercial skylights, use safety harnesses and follow OSHA fall protection guidelines. If you're unsure, it's safer to call a professional.

Checking and Maintaining Seals 🔍

The seal is the unsung hero of your skylight. It's what keeps the outside, outside. Over time, UV rays, temperature swings, and settling can weaken these seals—causing drafts or water seepage.

How to inspect seals:

• Look for gaps, cracks, or peeling around the skylight frame.
• Gently press the edge—if the seal flexes or crumbles, it may be failing.
• Feel for cold air movement during windy days.
• From the attic, check for any daylight shining through seams.

Seal maintenance tips:

• Clean the perimeter: Dirt buildup can break down sealant. Wipe the frame before inspecting.
• Apply new sealant: Use roofing-grade silicone or polyurethane caulk, following manufacturer instructions. Avoid over-applying, which can trap moisture.
• Replace weatherstripping: If rubber gaskets look brittle or missing, swap them out with compatible replacements.

If you spot persistent issues, it might be time for a professional skylight repair assessment. Quick fixes can stave off bigger headaches.

Preventing and Addressing Leaks

Leaks are the number one concern for skylight owners. A slow drip may seem minor, but water has a way of finding trouble, seeping into insulation and framing unseen. The earlier you catch a leak, the less damage it does.

Common leak signs:

• Damp spots or yellow stains on the ceiling near the skylight
• Condensation between glass panes
• Bubbling paint or peeling wallpaper
• Musty odors in the room below

Prevention steps:

• Inspect after heavy storms or hail.
• Keep gutters, downspouts, and flashing clear—clogged drains can redirect water toward skylights.
• Schedule annual roof and skylight inspections, especially before major seasonal changes.

If you notice a leak:

• Place a bucket to catch drips.
• Dry wet areas with towels or fans to limit damage.
• Avoid poking or prying at the frame, which can worsen the seal.
• Call a qualified roofing professional for leak repair and a full inspection.

Quick Safety Checklist for Owners

• Never climb on a wet or icy roof.
• Use a safety harness when working above ground level.
• Keep children and pets away from work areas.
• Store cleaning supplies and ladders securely after use.
• Know your limitations—call for help if unsure.

DIY vs. Call a Pro: When to Take Action

Some skylight tasks are safe for handy homeowners; others cross into risky territory.

DIY maintenance:

• Light cleaning from inside (if accessible)
• Wiping dust from interior glass
• Visual inspection for obvious cracks or stains

Call a pro for:

• Exterior cleaning on steep or high roofs
• Seal replacement or leak repair
• Skylight glass or frame replacement
• Recurring moisture or mold issues

For complex issues, a professional roofer brings specialized tools, safe access, and the right materials to prevent future leaks.

What the Pros Do On Arrival

When you schedule skylight service with Robert Foley Roofing, here’s what to expect:

• Safety assessment and equipment setup
• Full inspection of glass, frame, flashing, and nearby roof area
• Leak tracing with moisture meters or infrared tools, if needed
• Cleaning using appropriate solutions and non-abrasive tools
• Resealing or repairing compromised areas
• Recommendations for ongoing care or necessary upgrades

We follow industry best practices and all relevant building codes, so your repair meets high standards every time.

Prevention & Maintenance Tips You Can Use

• Clean skylight glass twice a year—spring and fall are ideal.
• Clear debris from gutters and downspouts regularly to reduce overflow risk.
• Check attic or ceiling beneath skylights after storms.
• Trim nearby overhanging branches to prevent scratches or falling debris.
• Schedule professional inspections every 12–24 months.

These simple routines can keep your skylight—and your peace of mind—intact year-round.

Costs & Time Factors

Skylight maintenance doesn’t have to break the bank. Most basic cleaning and inspection tasks can be done in under an hour, with minimal materials. Sealant and minor repairs are affordable if caught early.

Neglect, on the other hand, can lead to hidden costs—like interior repairs, insulation replacement, or even full skylight or roof replacement.

For businesses and homeowners alike, regular upkeep is far less disruptive (and expensive) than emergency water extraction or structural repair.

When It's an Emergency

Some leaks can wait for a dry day. Others need attention now. If you see water pouring in, glass cracked from hail, or sagging ceiling panels, it’s time for immediate action. Priority response is critical to limit mold growth and prevent electrical hazards.

Local teams are ready to help in your area—including skilled crews available for urgent repair needs should your skylight need emergency attention.

Seasonal Considerations: Weather and Skylight Care

Spring brings pollen and dust, while autumn sheds leaves and debris. Before winter, check seals and clear snow buildup to prevent ice dams. After summer storms, inspect for hail or wind damage.

Flat roofs and commercial buildings require special attention during rainy seasons, as pooling water can magnify skylight leaks. Regular maintenance before and after extreme weather keeps problems small and manageable.

Common Mistakes to Avoid

• Using abrasive cleaners that scratch glass or wear down seals
• Ignoring small cracks, hoping they’ll “go away”
• Forgetting to clear gutters and downspouts near skylights
• Applying too much sealant, which can trap moisture and cause more leaks
• Skipping routine inspections after severe weather

A little care now prevents big repairs later.

Signs of Trouble: What to Watch For

• Foggy or milky glass (moisture between panes)
• Dripping or damp smells after rain
• Visible mold or mildew inside the skylight frame
• Peeling paint or warped drywall beneath the unit

These early warning signs mean it’s time for a closer look—or a call to roofing professionals.

Timeline & Disruption: What to Expect from Service

Most skylight maintenance or minor repairs can be done in a single visit. Cleaning, inspection, and resealing typically take a few hours, with minimal disruption to your space. Larger repairs or glass replacement may require a return trip, but most work is quick and tidy.

Commercial clients appreciate after-hours scheduling, ensuring business can continue uninterrupted.

Materials & Equipment: What Works Best

• Microfiber cloths and non-abrasive sponges for cleaning
• Gentle, non-ammonia glass cleaner
• Roofing-grade silicone or polyurethane sealant
• Caulking gun for precision work
• Safety gear: gloves, harness, sturdy ladder

Always use products recommended by your skylight manufacturer, and reference safety standards from OSHA and local building codes.

FAQ: Skylight Maintenance Myths

Q: Will cleaning a skylight void my warranty?
A: Not if you follow manufacturer guidelines and use non-abrasive products. Professional service may be required for major repairs.

Q: Can I just cover a leaky skylight until I have time to fix it?
A: Temporary covers may help in an emergency, but can trap moisture and cause further damage. Prompt inspection is best.

Q: How often should skylight seals be replaced?
A: Seals typically last 5–10 years, but extreme weather or sun exposure can shorten their lifespan. Inspect annually.

Ready to Keep Your Skylight Bright and Leak-Free?

A clean, well-sealed skylight is a joy—flooding your space with light, not water. Whether you’re maintaining a busy office, a cozy living room, or a new construction, regular care protects your investment and peace of mind. For help with cleaning, sealing, or professional skylight repair, Robert Foley Roofing is here when you need us.

Call Robert Foley Roofing now — or reach us anytime at  844-684-1881 .