Your skylight might only leak during storms because the water pressure is too high for small, existing issues to handle.

Storm conditions often expose vulnerabilities in your skylight that are not apparent during normal weather.

TL;DR:

  • Storms create intense water pressure, overwhelming compromised skylight seals.
  • Wind-driven rain is a major culprit, forcing water into tiny gaps.
  • Ice dams can form and melt, causing water to back up under shingles.
  • The flashing around your skylight is critical for directing water away.
  • Degraded seals and cracked glass are common points of failure.

Why is my skylight leaking only during storms?

It’s a common and frustrating problem. You have a perfectly fine skylight for weeks, but then a big storm rolls in, and suddenly you’re spotting water stains on your ceiling. Why does this happen? The answer usually lies in the extreme conditions that storms bring. Normal rain might trickle gently, but storm-level rain, often combined with strong winds, creates a much more forceful assault on your roof and skylight.

The Power of Storm-Force Water

Think of it like a gentle shower versus a power wash. During a typical rain, water has time to flow naturally away from your skylight. Storms, however, bring heavy downpours and high winds. This wind-driven rain can be forced into tiny cracks or gaps that wouldn’t be an issue otherwise. The sheer volume and force can overwhelm even minor imperfections.

Wind-Driven Rain: A Sneaky Intruder

Wind is a major factor when it comes to storm leaks. It doesn’t just push rain down; it pushes it sideways and upwards too. If there are any small gaps in your skylight’s seals, flashing, or where the glass meets the frame, wind can drive water right through them. This is why you might see leaks during a windy storm even if it’s not raining exceptionally hard.

Common Skylight Vulnerabilities Exposed by Storms

Skylights, while beautiful, are essentially holes in your roof. They require careful installation and maintenance to prevent leaks. Storms are adept at finding the weakest points. These often include the seals around the glass and the flashing that integrates the skylight with your roofing system.

Degraded Seals and Gaskets

Over time, the rubber or silicone seals around your skylight can dry out, crack, or shrink. This is a natural part of aging. When this happens, these seals lose their ability to create a watertight barrier. During a storm, the increased water pressure and wind can push water past these compromised seals, leading to leaks. It’s a classic case of small damage leading to bigger problems.

Issues with Skylight Flashing

The flashing is metal or rubber material installed around the base of the skylight. Its job is to direct water away from the opening and onto the roof. If this flashing is damaged, improperly installed, or has corroded, it can fail. During a storm, water can pool on the roof and then seep in through any gaps in the flashing system. This is similar to how leaking window wells can allow water into your home’s lower levels.

Cracked or Damaged Glass

While less common, a cracked or broken skylight pane is an obvious entry point for water. Storms can sometimes cause damage from falling debris, or extreme temperature changes can cause existing minor cracks to expand. Even a small crack can allow a surprising amount of water in when subjected to storm conditions. You might also notice signs of a slow leak even before a major storm if there’s a hairline fracture.

Beyond the Skylight: Related Issues During Storms

Sometimes, the leak you see from the skylight isn’t just the skylight. Storms can exacerbate other roof or plumbing issues that then manifest as a leak near your skylight.

Roofing Material Problems

Loose or damaged shingles on the roof around the skylight can allow water to infiltrate. During a storm, wind can lift shingles, and heavy rain can then get underneath them, finding its way down to the attic or ceiling. This is where understanding the difference between if your roof is leaking or just condensation becomes important.

Ice Dams in Colder Climates

In regions that experience freezing temperatures, ice dams can form on roofs during winter storms. These dams prevent melting snow and ice from draining properly. The water can then back up under shingles and flashing, finding its way into your home. This is a particularly tricky issue that can cause extensive damage if not addressed. It’s a form of water around the foundation or, in this case, the roofline.

Attic Ventilation and Insulation

While not a direct cause of storm leaks, poor attic ventilation and insulation can worsen the effects of water intrusion. If water gets into the attic, proper ventilation helps it dry out. Without it, moisture can linger, leading to mold and rot, making the situation worse over time. This is akin to how basement wall leaks can be related to exterior water management.

What to Do When Your Skylight Leaks During a Storm

The most important thing is to act quickly to prevent further damage. Water can wreak havoc on your home’s structure, electrical systems, and create unhealthy mold growth. While waiting for the storm to pass, you can take some temporary measures.

Immediate Steps for Leaking Skylights

  • Place buckets or containers to catch the dripping water.
  • If safe to do so, try to protect your belongings with plastic sheeting.
  • Document the leak with photos or videos for insurance purposes.

When to Call a Professional

Once the storm has subsided, it’s time to get a professional assessment. Trying to fix a skylight leak yourself can be dangerous and may lead to improper repairs that cause more problems. Professionals have the tools and expertise to identify the exact source of the leak and perform lasting repairs. They can also spot potential issues you might miss, like hidden plumbing leaks indoors that could be contributing.

Preventative Measures for Future Storms

The best way to deal with storm leaks is to prevent them from happening in the first place. Regular maintenance is key to ensuring your skylight remains a source of light, not a source of water damage.

Regular Inspections are Key

We recommend a routine roof and skylight inspection at least once a year, and especially after major weather events. This allows for early detection of any wear and tear on seals, flashing, or the glass itself.

Maintain Your Roof

Keep your roof clear of debris, especially leaves and branches that can trap moisture and clog gutters. Ensure your shingles are in good condition and that there are no signs of wear or damage.

Check Seals and Flashing Annually

Pay close attention to the seals around your skylight and the integrity of the flashing. Any signs of cracking, peeling, or corrosion should be addressed promptly. Don’t let small leaks cause bigger damage.

Understanding the Urgency of Skylight Leaks

A skylight that only leaks during storms might seem like a minor inconvenience. However, the water intrusion, even if intermittent, can lead to serious structural damage and mold growth over time. The hidden nature of leaks means that damage can be occurring within your walls or attic without you realizing it. This is why it’s so important to address these issues promptly, much like you would with finding a hidden water leak behind a wall.

The Risk of Mold and Structural Damage

Water that enters your home during a storm can create ideal conditions for mold and mildew. These fungi can spread rapidly, posing serious health risks. Furthermore, persistent moisture can weaken wooden beams, insulation, and drywall, leading to costly structural repairs. Ignoring these leaks is never a good idea, as it can lead to significant issues like leaking pipes behind walls causing unseen damage.

Conclusion

Your skylight leaking only during storms is a clear signal that its defenses are being overwhelmed by severe weather. Whether it’s the force of wind-driven rain, compromised seals, or damaged flashing, these leaks are a warning sign that needs attention. Addressing these issues promptly not only prevents immediate water damage but also safeguards your home against long-term problems like mold and structural weakening. At Katy Damage Recovery Experts, we understand the unique challenges that homeowners face with storm-related damage and are here to help you restore your peace of mind and your home’s integrity.

What if the leak seems to come from multiple places after a storm?

Storms can sometimes reveal multiple vulnerabilities at once. If you notice leaks from different areas, it’s essential to have a thorough inspection. Our team can help pinpoint all sources of water intrusion, ensuring a complete and effective repair. We look for things like water supply line failures or other plumbing issues that might be exacerbated.

How can I tell if the leak is from the skylight or a different roof area?

It can be tricky. Water can travel along rafters before appearing. Look for the most direct signs of water entry at the skylight itself. However, if the leak is widespread or appears far from the skylight, the issue might be with the surrounding roof. It’s always best to call a professional right away for a proper diagnosis.

Is it safe to be in the room with a leaking skylight during a storm?

It’s generally advisable to avoid the immediate area if possible. Water can damage electrical fixtures, and there’s a small risk of ceiling collapse if the saturation is severe. During an active storm, prioritize safety and stay clear of the affected zone. We recommend you do not wait to get help once the storm passes.

How often should skylight seals be checked?

We recommend inspecting your skylight seals at least once a year, ideally in the spring after winter weather and in the fall before winter storms. More frequent checks might be needed if you live in an area with extreme weather or if your skylight is older. Schedule a free inspection if you have any concerns.

Can a small skylight leak during a storm lead to major structural damage?

Absolutely. Even a small amount of water can saturate insulation and wood over time, leading to rot and weakening the structural integrity of your roof and ceiling. This can also create a breeding ground for mold, which can cause health problems and further damage. It’s crucial to address these issues before they escalate into wet basement after heavy rain type problems.

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