Condensation in a double glazed window is more than just a cosmetic issue. It can indicate that the seal between the two panes has failed, allowing moisture to accumulate between them. While the urge to try a DIY fix might be strong, it’s important to understand the complexity involved and the potential risks. This guide will walk you through the steps you can take if you decide to attempt a repair, while also discussing when it's best to call in professionals.
Why Your Double Glazed Window is Getting Condensation
The primary cause of condensation in a double glazed window is a failed seal. Over time, the seal around the edges of the window may deteriorate due to exposure to extreme temperatures, age, or manufacturing defects. When this happens, moisture from the indoor environment can seep between the two glass panes, leading to dampness and foggy windows.
DIY vs Professional Repair
If you are a fan of DIY projects, you might be tempted to try repairing the window yourself. However, given the complexity of the issue, it’s crucial to weigh the risks and your own capabilities.
Do You Have the Necessary Tools and Experience?
Sturdy Work Surface: You need a stable, flat surface to work on, as the double glazing units are delicate.
Repair Kit: Typically, these include new seals, a butyl tape, and aluminum channels.
Adequate Tools: Basic tools like a utility knife, a hot knife, and possibly a vacuum pump for removing air and moisture.
Correct Technique: Knowing how to properly reassemble and seal the glass is crucial to prevent further damage.
While some of these tools and techniques can be learned and mastered, it’s important to note that true expertise is necessary to ensure the window remains watertight and performs as intended.
When to Call a Professional
Professional glass shops have specific equipment and experience that make them better suited for handling complex repairs. Some cases where you should definitely call a professional include:
Severe Damage: If the seal is severely compromised or the glass is cracked.
Complex Layout: If the double glazed window is part of a larger, intricate design or is located in a challenging area like a skylight.
Time Constraints: If you need the window to be fixed quickly, as professionals typically have experience in expedited repairs.
For instance, during my time in a glass shop in the early 1980s, we would strip off the aluminum frame, remove the solid butyl seal, and start the repair process from scratch. If the damage was too extensive or the window was in a critical location, we would advise the customer to get a new unit.
Alternative Solutions
If you do not wish to invest time and effort into a DIY repair, there are alternative options available:
Frosting the Glass Panels: For a DIY-friendly solution, you can frost the affected area of the glass. This won’t stop condensation but will make it less noticeable. This method involves using heat to permanently alter the appearance of the glass.
Professional Installation: The most reliable solution is to have a new double glazed window installed. This involves removing the old unit, cleaning the frame and surrounding area, and ensuring that the new unit is properly sealed and aligned.
Common Mistakes to Avoid
When attempting a DIY repair, there are key points to watch out for to ensure you can fix the issue effectively and safely.
1. Etching Due to Mineral Deposits
It’s important to address any mineral deposits on the glass that could cause etching. Solutions may include vinegar or specialized glass cleaners, but if these don’t work, professional chemicals might be needed.
2. Incorrect Sealing
Using the wrong type of seal can lead to further moisture issues. It’s important to use a seal that is designed for double glazed windows, such as butyl tape, to ensure a watertight seal.
3. Ensuring Proper Alignment
The two panes of glass need to be properly aligned to prevent gaps forming, which can allow moisture to seep in. This is a critical step in any repair, yet it’s easy to overlook.
Conclusion
Condensation in a double glazed window is a common issue, but it requires a proper understanding of the problem and the necessary expertise to solve it. Whether you decide to attempt a DIY repair or rely on professionals, ensuring the seal is tight and watertight is crucial to preventing further damage and maintaining the energy efficiency of your home or building.