When you look outside, you want a clear view, not a foggy window. Foggy windows are a problem that many Ottawa homeowners are all too familiar with. To understand how to remedy this issue, it is crucial to delve into the why and how of window defogging, especially with insulated glass units (IGUs).
Understanding Insulated Glass Units (IGUs)
Windows have evolved to adapt to various climates and preferences. Insulated glass units, often referred to as IGUs, are a common feature in modern homes. The purpose of this setup is to enhance the thermal efficiency of the window, thereby reducing heat loss and helping to maintain a pleasant indoor temperature.
The IGUs feature a seal around the edges. This seal is integral to maintaining the space between the panes and ensuring the inert gas remains trapped inside. Unfortunately, these seals can fail over time due to several factors, leading to foggy windows.
Why Do IGUs Develop Condensation?
Window fogging generally occurs when there is a failure in the IGU. Let’s explore the primary reasons for this failure:
- Failed Seals: The seals around the IGU are crucial. Over time, these seals can deteriorate due to weather conditions, improper installation, or natural aging. When the seal fails, moisture from the air can invade the space, leading to condensation.
- Trapped Moisture: Once the seal is compromised, the moisture that sneaks in will condense on the colder surfaces within the IGU. Ottawa’s cold winters can exacerbate this issue, as the temperature difference between the indoor and outdoor environments becomes more pronounced. This trapped moisture leads to the foggy appearance often observed on windows.
- Gas Leakage: IGUs often come filled with inert gases like argon. These gases are denser than air and help improve the window’s insulation properties. When the seal fails, these gases can escape, allowing air to infiltrate, which lowers the window’s energy efficiency.
The Consequences of Foggy Windows
Foggy windows are more than just an eyesore. They can lead to significant issues:
– Energy Efficiency: When inert gas escapes and is replaced by air, the insulating properties of the window decrease. This results in increased heat loss in the winter and greater heat gain in the summer, leading to higher energy bills as heating and cooling systems work harder.
– Water Infiltration: When moisture accumulates within the window, it can seep into the walls or window frames, potentially causing structural damage or mould growth.
– Reduced Visibility: A foggy window obscures the view, depriving homeowners of natural light and external views.
How Does Window Defogging Work?
Window defogging is the process used to deal with the accumulation of condensation within IGUs. It involves several key steps, which focus on removing moisture, drying the cavity, and resealing to restore the window’s functionality.
- Assessing the Work Area
Before beginning any window defogging service, professionals need to assess the work area to identify the exact cause of the fogging. It’s crucial to determine whether the issue is a seal failure, air leakage, or another problem that is causing the fogging.
- Drilling and Defogging Procedure
– Drilling Holes: Professionals drill small holes into the glass or sash of the window. These holes allow for the moisture trapped inside to escape.
– Application of a Vinyl Hose: A vinyl hose is sometimes connected to these holes to suck out moisture or inject air to aid the drying process.
– Evaporation and Cleaning: Warm air is blown into the gap between panes, facilitating the evaporation of moisture. This drying step is crucial and can sometimes be a prolonged part of the window defogging procedure, depending on the level of humidity.
- Cleaning the Pane
Once the moisture is removed, any residual minerals or streaks left by condensation are cleaned. This cleaning ensures maximum clarity and restores the window to its original visibility.
- Sealing the Window
– Resealing: After cleaning, the holes are sealed, and sometimes the edge seals are reinforced or replaced to prevent future leaks.
– Replacing Inert Gas: Some professionals also offer to refill the IGU with inert gas.
DIY Window Defogging: Is It a Good Idea?
For many homeowners, doing it yourself might seem like an appealing option. However, window defogging requires specialized tools and knowledge to be repaired effectively.
– Risks of DIY Work: Without the right equipment or expertise, a DIY approach might exacerbate the problem or result in damage to the window.
– Professional Window Repair Options: Hiring professionals typically guarantees a more thorough job. They can ensure proper resealing and evaluate whether the IGU needs gas replacement or other repairs.
When to Repair and When to Replace?
– Repair: Choose repair if the seal failure is minor, and the window structure is still sound.
– Replace: Opt for glass replacement if there is significant damage to the glass or if repair attempts have repeatedly failed. In instances where energy efficiency is a top concern, considering a glass replacement to modern, double or triple-glazing units might be beneficial.
Steps to Prevent Future Fogging
To keep windows clear and efficient, homeowners in Ottawa can take some preventive steps:
– Inspection: Check windows every month to see if there are any indications of failure, such as condensation between panes.
– Prompt Repair of Air and Water Infiltration: Address any signs of air or water infiltration immediately. This includes paying attention to drafts and water leaks near window areas.
– Ensure Proper Replacement: Professional glass replacement reduces the likelihood of premature seal failure and drafts.
– Quality Materials: When replacing windows, investing in high-quality materials can reduce future problems related to insulation and seal integrity.
Conclusion
Window defogging is more than just a cosmetic fix; it’s about restoring the functionality and efficiency of your windows. Understanding the causes of IGU failure and the defogging process helps homeowners make informed decisions about window maintenance and repair. By learning these essentials, Ottawa homeowners can enjoy clear views and better energy efficiency, even when the winter winds blow and drafts slip around corners.
