
If you have water or condensation between the panes of your double-glazed windows, it means the seal is broken. This can happen due to old age, water retention in the frame, improper drainage around the window, or direct exposure to sunlight. While there are some DIY methods to remove the water, such as drilling holes and using a moisture absorber, these are only temporary solutions. The seal cannot be repaired, and the window will likely need to be replaced. However, it may be possible to replace only the glass unit and not the entire window.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Cause of Water Between Double Pane Windows | Seal breakage due to old age, water retention in the frame, improper drainage, direct exposure to sunlight, or manufacturing defects |
| Solutions | Hire a professional, replace the window, reseal the window, drill holes and use a moisture absorber, use a dehumidifier, or use a water snake |
| Window Lifespan | 10 to 20 years |
| Window Maintenance | Regular cleaning, especially after noticing dirt or condensation build-up |
| Condensation Formation | Warm indoor air with higher humidity comes in contact with the cold window surface, causing water vapour to condense into liquid |
| Seal Function | Locks air in to act as an insulator and regulate temperature |
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What You'll Learn

The cause of water between double-pane windows
Water, or condensation, between double-pane windows is caused by a combination of factors. Firstly, the insulating airspace between the two panes of glass in a double-pane window is designed to reduce heat loss by trapping a layer of gas, usually argon or air, which acts as insulation. However, if the seals around the glass windows break down over time, warm, moist air can seep in, and when this warm air cools, condensation forms.
Double-pane windows have two seals: an inner seal to protect against moisture and corrosion, and an outer seal to protect the window's strength. Over time, these seals can break down due to old age, water retention in the frame, improper drainage, or direct exposure to sunlight, which causes the glass to expand and contract, weakening the seal.
Once the seal is broken, moisture can form between the glass panes, giving the windows a milky or foggy appearance. This condensation can lead to irreversible physical damage, with water droplets running down the window and carving grooves into the glass surface.
In addition to seal issues, condensation can also be caused by high humidity levels in the surrounding environment. Activities like making coffee or having plants in the room can raise humidity levels, leading to excess moisture in the air that can condense between the panes.
Finally, some windows may have been manufactured with small defects in the seals, causing them to fail prematurely. This is known as batch failure and can result in condensation forming between the panes.
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How to find a professional to fix the issue
If you are looking to hire a professional to fix the issue of water between double-pane windows, there are several options to consider. Firstly, you can contact a professional glass repair and installation company that specializes in diagnosing and resolving foggy window problems. These companies have the necessary tools and expertise to effectively address the issue. You can also explore the option of engaging a thermal window restoration or repair company, which utilizes a technique that involves drilling small holes in the affected window, spraying liquid solutions to clean the panes, and then sealing the holes with vent plugs. This method helps remove the moisture and restore the window's functionality.
When selecting a professional service, it is advisable to prioritize companies with experienced teams of glass repair experts. These experts should be well-versed in installing new insulated window glass, ensuring that your home remains energy-efficient. It is also beneficial to seek out companies that offer free estimates and professional services within your area. This way, you can understand the cost and scope of the repair work required.
In addition, it is worth considering the extent of the damage, as this may dictate the approach taken by the professional. For instance, if the window frame is also damaged, a complete window replacement, including the glass and the frame, might be recommended. This comprehensive approach ensures that both parts are new and functional, enhancing performance and energy efficiency.
To find a suitable professional, you can conduct an online search for local window repair companies or glass repair specialists. Reading reviews and testimonials from previous customers can provide valuable insights into the quality of their work and customer satisfaction. Additionally, you may want to inquire about warranties or guarantees offered by the professionals, as this can provide added peace of mind and protection in case any issues arise after the repair work is completed.
Lastly, it is important to address the underlying causes of the water accumulation to prevent recurrence. This may involve improving water drainage around the windows, maintaining indoor humidity levels, and opting for high-quality windows with good warranties during replacement. By taking a proactive approach, you can extend the lifespan of your double-pane windows and maintain their energy efficiency.
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Quick fixes to try yourself
If you notice condensation between the panes of your double-glazed windows, it may be a sign of a broken seal. While this can be fixed by a professional, there are some quick fixes you can try yourself to remove the condensation.
One method involves drilling a few small holes in the window to allow access to the interior. You can then use a vacuum cleaner with a brush attachment to carefully vacuum the interior surface of the windows, removing any loose dust or debris. You can also create a solution of equal parts vinegar and water in a spray bottle and spray this onto the interior side of the window, focusing on the areas with haze. Gently wipe the glass in a circular motion with a microfiber or lint-free cloth. If the haze persists, you can try using a glass cleaner or a solution of ammonia and water. Finally, use a clean, dry cloth to wipe away any excess moisture.
Another option is to purchase a water snake moisture absorber and place it next to the window. This will help to absorb any excess moisture in the air, reducing condensation.
It is important to note that these fixes may only provide a temporary solution and that the seal may eventually need to be replaced by a professional to fully resolve the issue.
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How to clean double-pane windows
Double-pane windows have two panes of glass constructed with an airtight seal between them. This seal locks the air in so that it can act as an insulator. When this seal is damaged, condensation and dirt may seep in. This can make it difficult to clean the windows, as removing the two panes to clean inside them can be cumbersome. However, there are a few options for cleaning double-pane windows without hiring a professional.
Option 1: Drill Holes
If you are confident with a drill, you can try drilling a few holes into the window. This will allow you to tuck a small desiccant packet into the window to absorb any moisture caught between the panes. The holes also let you rinse out the window with rubbing alcohol (isopropyl) to remove any dirt. If there is a lot of dirt build-up, you may need to create a device to thread through the holes and wipe the window. After cleaning, use a clean, dry cloth to wipe away any remaining moisture from the glass.
Option 2: Vacuum
If you are cautious about drilling holes in your windows, there is a method without drilling. However, this will only work if moisture is your only issue. If you have dirt trapped inside the panes, drilling holes or hiring a professional is advised. Using a vacuum cleaner with a brush attachment, carefully vacuum the interior surface of the windows to remove any loose dust or debris. Pay close attention to the corners, edges, and grooves where dirt tends to accumulate. If distilled water is not sufficient, prepare a gentle glass cleaner by diluting it with distilled water. Pour the solution into a spray bottle and lightly mist it onto the interior surface of the glass.
Option 3: Spray Solution
To remove haze from a double-pane window, mix a solution of equal parts vinegar and water in a spray bottle. Spray the solution onto the interior side of the window, focusing on hazy areas. Next, use a microfiber cloth or lint-free cloth to gently wipe the glass in a circular motion. If the haze persists, try using a glass cleaner designed for removing haze or a solution of ammonia and water. Finally, use a clean, dry cloth to wipe away any excess moisture, leaving your window streak-free and clear.
Please note that if the haze or moisture is between the glass panes, it may be a sign of a failed seal, and professional assistance may be required to address the issue.
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When to replace the window
If you have condensation or water between the panes of your double-glazed windows, it may be a sign of a broken seal. This can happen due to old age, water retention in the frame, or improper drainage around the window. Direct exposure to sunlight can also cause the glass to expand, contract, and weaken over time, leading to seal damage.
While it is possible to repair a broken seal, this requires drilling holes into the window to vacuum out the moisture and inject a "defogger" device. Some sources debate whether this process truly fixes the issue or merely removes the symptom.
In most cases, it is recommended to replace the entire window. Both panes of a double-glazed window must be replaced to maintain a proper seal and insulate your home effectively. A window expert should be consulted to assess the condition of your frame and determine if you can simply replace the panes.
If you are considering replacing your windows, it is worth noting that double-pane windows offer significant advantages over single-pane windows. They are excellent insulators, reducing heating and cooling costs and lowering energy consumption. They also improve noise control and protect against UV rays. Modern double-pane windows are often filled with argon gas, which further enhances their insulating abilities.
The standard lifespan of double-pane windows ranges from 10 to 20 years. If your windows are older than this, it may be time to consider replacing them. Additionally, if your windows have physical damage, such as cracks or peeling seals, it is likely time for an upgrade.
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Frequently asked questions
Water gets trapped between double-pane windows when the seal between the two panes is damaged or broken. This can happen due to old age, direct exposure to sunlight, or water retention in the frame.
There are a few methods to get rid of condensation in double-pane windows:
- Drill a small hole and use a vacuum cleaner with a brush attachment to remove any loose dust or dirt.
- Use a solution of vinegar and water or a glass cleaner to wipe down the window.
- Use a dehumidifier to reduce moisture in the air.
- Contact a professional to get the seal repaired or replaced.
To prevent condensation from forming, you can:
- Ensure proper drainage around the window.
- Use a desiccant or dehumidifier to reduce moisture in the air.
- Avoid direct exposure to sunlight, which can cause the glass to expand and contract, weakening the seal.










































