A leaking skylight is a serious issue that can lead to water damage, mold growth, and compromised structural integrity. Skylights are designed to provide natural light and aesthetic appeal, but when leaks occur, prompt attention is crucial to prevent further problems.

1. Improper Installation

• Poorly installed skylights may leave gaps or weak seals, allowing water to seep through.

2. Damaged or Worn Flashing

• Flashing around the skylight can deteriorate or become dislodged over time, causing leaks.

3. Cracked or Broken Skylight Glass

• Impact damage or aging can lead to cracks that allow water to enter.

4. Clogged or Faulty Drainage

• Debris blocking drainage channels can lead to water pooling around the skylight.

5. Aging Sealant

• The sealant used to secure the skylight may dry out, crack, or shrink, creating gaps for water to enter.

6. Condensation Issues

• Poor ventilation can cause condensation to collect and mimic a leak.

7. Roof Damage or Design Flaws

• Improper roof slopes, damaged shingles, or insufficient overhangs can direct water toward the skylight.

1. Water Damage

• Persistent leaks can damage ceilings, walls, insulation, and flooring.

2. Mold and Mildew Growth

• Moisture accumulation can lead to unhealthy mold and mildew, affecting indoor air quality.

3. Compromised Structural Integrity

• Prolonged exposure to water can weaken roof decking and framing around the skylight.

4. Energy Inefficiency

• Leaks can reduce insulation, increasing heating and cooling costs.

5. Aesthetic Issues

• Stains, peeling paint, and bubbling drywall can detract from your home’s interior.

1. Inspect the Skylight

• Check for visible cracks, gaps, or damage in the skylight glass and frame.

• Examine the flashing, roof shingles, and sealant around the skylight for wear or damage.

2. Address Minor Issues

• Clean the Skylight:

• Remove debris from around the skylight and drainage channels.

• Reapply Sealant:

• Use a high-quality silicone or roofing sealant to fill cracks or gaps in the skylight frame or flashing.

• Tighten Fasteners:

• Check and tighten screws or fasteners around the skylight to ensure a secure fit.

3. Repair Flashing

• Replace Damaged Flashing:

• Remove old flashing and install new pieces securely, ensuring they overlap properly to direct water away from the skylight.

4. Replace Broken Glass or Damaged Components

• If the skylight glass is cracked or damaged, replace it with new, properly fitted glass.

5. Address Roof Issues

• Repair or replace any damaged shingles or roofing materials around the skylight that may be contributing to the leak.

6. Improve Ventilation

• If condensation is the issue, improve airflow in the room or install a dehumidifier to reduce moisture levels.

1. Ensure Proper Installation

• Hire experienced professionals to install skylights and ensure adherence to manufacturer specifications.

2. Inspect Regularly

• Check skylights, flashing, and roof areas around them at least twice a year for signs of wear or damage.

3. Keep Gutters and Drains Clear

• Clean gutters and drainage channels regularly to prevent water from pooling on the roof.

4. Reapply Sealant Periodically

• Check and reapply sealant as needed to maintain a watertight seal around the skylight.

5. Upgrade to Modern Skylights

• Consider energy-efficient, leak-resistant skylights with improved seals and flashing.

• The leak persists despite DIY repairs.

• Damage extends to the roof, framing, or ceiling surrounding the skylight.

• The flashing or roof structure requires repair or replacement.

• You’re unsure of the cause of the leak and need expert evaluation.

A leaking skylight can cause significant damage if not addressed promptly. Regular maintenance, timely repairs, and proper installation can keep your skylights leak-free and functional for years to come.

Pro Tip: After repairing a skylight, document the process and inspect it after heavy rains to ensure the leak is fully resolved.