Shedding Light on Skylight Woes

Navigating the Common Causes of Water Penetration

From my vantage point as a professional roof inspector, skylights are often celebrated for the natural light and aesthetic appeal they add to homes. However, they can also be a source of vulnerability, especially when it comes to water penetration. Over the years, I've identified several common issues with skylights that can lead to leaks and water damage. Understanding these issues is crucial for homeowners looking to prevent potential water intrusion and maintain the integrity of their roofing system.

Improper Installation

One of the primary causes of skylight leaks is improper installation. This can include insufficient sealing, incorrect flashing, or failure to integrate the skylight properly with the surrounding roofing materials. A skylight needs to be installed with precision, ensuring that all components are correctly aligned and sealed to prevent water from entering around the edges.

Prevention Tip: Always have skylights installed by experienced professionals who follow the manufacturer's guidelines and best practices for installation.

Damaged or Deteriorated Seals

Skylights are sealed to keep water out, but over time, these seals can degrade due to exposure to the elements. UV radiation, temperature fluctuations, and weather conditions can cause the seals to crack, shrink, or become less effective, creating pathways for water to enter.

Prevention Tip: Regularly inspect the seals around your skylight and address any signs of wear or damage promptly. Sealant may need to be reapplied or replaced to maintain a watertight seal.

Faulty or Worn Flashing

Flashing is a critical component in the installation of skylights, serving as a barrier to water around the unit's perimeter. However, flashing can become damaged, corroded, or may detach over time, especially if it was not installed correctly in the first place. Faulty flashing is a common culprit behind skylight leaks.

Prevention Tip: Ensure that flashing is inspected regularly and that any issues are repaired quickly. In some cases, replacing the flashing may be necessary to ensure a watertight seal.

Condensation Buildup

Not all moisture issues related to skylights stem from external water penetration. Condensation can accumulate on the interior of the skylight due to differences in temperature and humidity levels inside and outside the home. If not adequately managed, condensation can lead to water damage over time.

Prevention Tip: Improve ventilation in areas with skylights to reduce humidity levels and prevent condensation. In some cases, installing a skylight with better insulation or double-glazing can also help manage condensation issues.

Cracked or Broken Glass

While less common, the glass or plastic pane of a skylight can become cracked or broken due to impact from debris, hail, or other factors. Even small cracks can allow water to seep through, leading to leaks and potential damage.

Prevention Tip: Inspect the glass pane of your skylight regularly for any signs of damage and replace it if necessary. Consider using laminated or tempered glass for added durability.

Conclusion

Skylights can significantly enhance the ambiance and value of your home, but they require careful attention to prevent and address water penetration issues. As a professional roof inspector, my advice to homeowners is to stay proactive about skylight maintenance. Regular inspections, timely repairs, and attention to signs of wear and damage can go a long way in preventing leaks and ensuring that your skylight continues to bring light into your home without the downside of water intrusion.