How to Fix Skylight Leak

February 9, 2024

Skylights are a wonderful addition to any home, bringing in natural light and enhancing the overall aesthetics of a room. However, skylight leaks can be a cause for concern and require immediate attention. In this blog post, we will provide you with an in-depth guide on how to identify and fix skylight leaks effectively.

Understanding Skylight Leaks

Before we delve into the repair process, it's important to understand the causes and signs of skylight leaks.

Causes of Skylight Leaks

Skylight leaks can occur due to various factors, including:

  1. Weather-related factors: Skylights are exposed to intense rainfall, snow, and wind, which can infiltrate the system, and a skylight may cause leaks
  2. Age-related degradation: Over time, the materials used in skylights, such as flashing and seals, may deteriorate, leading to leaks.
  3. Poor installation or maintenance: Incorrect installation or lack of regular maintenance can leave gaps or weak points that allow water to seep in.
  4. Roofing system issues: Roof problems like damaged shingles, improper flashing, or inadequate ventilation can contribute to skylight leaks.

Recognizing Signs of Skylight Leaks

To identify a skylight leak, keep an eye out for the following signs:

Signs of Skylight Leaks
Visible water drips or stains around the skylight area
Mold or mildew growth on the ceiling or adjacent walls
Increased humidity or condensation indoors
Water pooling or sagging near the skylight

If you notice any of these signs, it's crucial to address the issue promptly to prevent further damage to your property.

Preparing for Skylight Leak Repair

Before starting the repair process, gather the necessary tools and materials and ensure safety precautions are in place.

Gathering Necessary Tools and Materials

To fix a skylight leak, you'll need the following tools and materials:

  • Ladder
  • Caulking gun
  • Roofing cement
  • Flashing tape
  • Plumber's torch (if applicable)
  • Replacement skylight or necessary patching materials

Ensuring Safety Precautions

Safety should be your top priority during any repair work. Take the following precautions:

  • Ensure the ladder is stable and secure before climbing.
  • Wear appropriate protective gear, such as gloves and safety glasses.
  • Consider having a partner assist you to provide an extra level of safety.

Identifying the Source of the Skylight Leak

To fix the skylight leak effectively, a homeowner must first identify the source of the problem. This requires a thorough inspection both externally and internally.

Exterior Inspection

Start by conducting a visual inspection around the skylight area outdoors. Look for:

  • Damaged or missing shingles around the skylight
  • Gaps or cracks in the skylight frame and flashing
  • Loose or deteriorated fasteners and screws

Interior Inspection

Proceed with an interior inspection to further investigate the source of the leak. Look for:

  • Water stains or discoloration around the skylight
  • Damaged or worn-out skylight seals and gaskets
  • Signs of water intrusion in the ceiling and attic

Fixing Skylight Leaks

Once you've identified the source of the skylight leak, you can proceed with the necessary repairs. The repair process can vary based on the severity of the leak.

Temporary Patching (for minor leaks)

For minor leaks, you can apply temporary patches using the following steps:

  1. Apply roofing cement or flashing tape to small gaps or cracks in the skylight frame or flashing.
  2. Use a plumber's torch to gently heat and reseal rubber gaskets (if applicable).

Permanent Repair (for significant leaks or severe damage)

Significant leaks or severe damage require more extensive repairs. Follow these steps:

  1. Replace damaged or worn-out flashing, ensuring proper installation and a watertight seal.
  2. Apply a fresh layer of roofing cement around the skylight frame and flashing.
  3. Reinstall the shingles, ensuring proper alignment and attachment during a roof leak repair
  4. Consider seeking professional help if the repairs are complex or if extensive damage is present.

Preventive Measures for Skylight Maintenance

To prevent future skylight leaks and maintain the longevity of your skylights, regular maintenance is necessary. Consider the following preventive measures:

Regular Cleaning and Inspection

  • Remove debris or dirt buildup from the skylight and surrounding roof area as a part of skylight repair.
  • Check for loose fasteners, damaged seals, or deteriorated flashing.
  • Clean gutters to prevent water overflow onto the skylight.

Professional Maintenance Services

  • Arrange periodic professional inspections and maintenance to identify and address potential issues promptly.
  • Seek expert advice on skylight replacement if the existing skylight is faulty or beyond repair.


Skylights can significantly enhance your home's beauty and bring in natural light, but a leaking skylight can cause serious damage if left unattended. By following the steps outlined in this comprehensive guide, you can diagnose and repair skylight leaks effectively.

Remember, safety is crucial during any repair work, and hiring a professional roofing contractor or roofer is recommended for complex repairs or extensive damage. Regular maintenance and inspections will help prevent future leaks, a faulty skylight and ensure your skylights provide years of enjoyment and functionality in your home.

Don't let a skylight leak dampen your spirits; take action today to address any existing issues and enjoy a leak-free skylight for years to come!

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