Why is My Velux Window Leaking?

Velux windows are a popular choice for bringing natural light into a home, particularly in attics and loft conversions. However, like any other window, they can develop leaks over time.

Understanding the potential causes of these leaks can help you address the problem effectively and prevent further damage to your property. Here are some common reasons why your Velux window might be leaking:

1. Faulty Installation

One of the most common reasons for a leaking Velux window is improper installation. If the window wasn't installed correctly, gaps or misalignments can allow water to seep through. This issue often arises if the installer did not follow the manufacturer's guidelines or lacked experience with Velux products.

• Solution: If you suspect improper installation, it’s best to consult a professional. A certified Velux installer can inspect the window, identify any installation errors, and rectify them.

2. Worn or Damaged Flashing

Flashing is the material used around the edges of the Velux window to prevent water ingress. Over time, flashing can wear out, become damaged, or even dislodge, leading to leaks. This is particularly common in older windows where the flashing has been exposed to the elements for many years.

• Solution: Inspect the flashing around your Velux window for signs of wear, damage, or displacement. If you find any issues, replacing the flashing or repairing the damaged sections can help stop the leak.

3. Blocked or Damaged Gutters and Downpipes

Clogged or damaged gutters and downpipes can cause water to overflow and run down the exterior walls of your home, potentially entering through the Velux window. This is especially problematic during heavy rain when the gutters are unable to handle the increased water flow.

• Solution: Regularly clean and maintain your gutters and downpipes to ensure they are free from debris and functioning correctly. If they are damaged, repair or replace them as necessary to prevent water overflow.

4. Sealant Deterioration

The sealant around your Velux window can deteriorate over time due to exposure to sunlight, temperature changes, and weather conditions. Cracked or missing sealant can create gaps that allow water to enter.

• Solution: Check the sealant around your Velux window. If it’s cracked or missing, reapply a high-quality, waterproof sealant to ensure a watertight seal.

5. Condensation Issues

Condensation can sometimes be mistaken for a leak. If your Velux window is not properly insulated or if there is poor ventilation in the room, condensation can form on the inside of the window and drip down, giving the appearance of a leak.

• Solution: Improve ventilation in the room and ensure the window is properly insulated. Using a dehumidifier can also help reduce condensation.

6. Roof Damage

Damage to the roof around your Velux window can also lead to leaks. Missing or broken roof tiles, damaged roof felt, or structural issues can allow water to penetrate and reach the window.

• Solution: Inspect the roof around your Velux window for any signs of damage. Repairing or replacing damaged roof components can help prevent leaks.

7. Poor Maintenance

Regular maintenance is crucial to the longevity and performance of your Velux window. Neglecting maintenance can lead to various issues, including leaks.

• Solution: Perform regular maintenance checks on your Velux window, including cleaning, inspecting for damage, and ensuring all components are in good working order.

Conclusion

A leaking Velux window can be a frustrating issue, but understanding the potential causes can help you address the problem effectively. Whether it’s due to faulty installation, worn flashing, blocked gutters, deteriorated sealant, condensation, roof damage, or poor maintenance, taking the appropriate steps can help you restore the integrity of your window and prevent further leaks. If you’re unsure about the cause of the leak or how to fix it, consulting a professional is always a wise decision.