Double-pane windows are a popular choice for energy efficiency and improved insulation. Over time, these windows develop moisture problems that not only affect their appearance but also their functionality. When condensation builds up between the panes, it leads to foggy windows, reduced visibility, and potential damage to the window frame.
This guide will explain why moisture in double-pane windows happens, how to find the problem, and good ways to get rid of it and make your windows look better.
*Costs in this article sourced from contractor estimates used by Angi.
Understanding Double-Pane Window Moisture Issues
Double-pane windows, also known as insulated glass units (IGUs), are designed with two layers of glass separated by a sealed space. This configuration provides excellent insulation and energy efficiency. When the seal between the panes fails, it allows moisture to enter the space between the glass, leading to various problems.
Causes of Moisture Buildup in Double-Pane Windows
Several factors contribute to moisture buildup in double-pane windows.
Firstly, seal failure is a primary culprit. Over time, seals degrade due to age or manufacturing defects. This degradation might not be immediately noticeable, but even a slight seal failure allows moisture to seep throughout the years, leading to condensation issues.
Improper installation is another significant cause. If you don’t install windows correctly, they might not withstand environmental pressures, causing gaps that allow moisture infiltration. This is particularly true if you don’t caulk corners correctly or the frame isn’t adequately aligned.
Also, extreme temperature changes cause the materials to grow and shrink, worsening any existing seals problems. Continuous heating and cooling make the glass and seals contract and expand, weakening the seal over time.
Physical damage to the window frame or glass is also a potential contributor. A crack, even if it’s minor, breaches the protective barrier provided by the double-pane system. Handling windows carefully can avoid such damage; routine inspections catch these issues early.
Poor drainage around the window results in water retention, another cause of moisture buildup. You need to establish proper water drainage around your home to prevent water from pooling near window sills and frames.
Signs of Moisture in Double-Pane Windows
You should be aware of several indicators that moisture has breached their double-pane windows:
The most common sign is a foggy or cloudy appearance between the panes. This occurs when water vapor gets trapped within the sealed space, condensing into liquid form and giving the glass a fogged look. This severely impacts visibility and the aesthetic charm of a home.
Water droplets or condensation visible inside the window are another telltale sign. If you notice droplets or a steady buildup of moisture, it’s a clear sign that the window seal has failed.
Streaks or water stains on the interior glass surface point to prolonged moisture exposure. Often, these streaks become noticeable when they dry up, leaving behind mineral deposits.
Furthermore, frost or ice formation between the panes occurs during cold weather, exacerbating the issue. Ice stresses window seals and frames, further causing more damage if left unaddressed.
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How to Remove Moisture from Double-Pane Windows
When faced with moisture problems in double-pane windows, you have several options to consider. The most effective solutions involve professional intervention, but there are also some temporary measures that you can take while awaiting repairs.
Professional Solutions
You should consider several professional solutions to permanently fix moisture issues in double-pane windows.
The first option is to replace the IGU. This involves removing the old, compromised glass unit and installing a new one with intact seals. It’s typically the most cost-effective and efficient solution, particularly if the frames are still in good condition. This process restores the full insulating properties of the windows.
If the window frame is also damaged, replacing the entire sash might be necessary. This option is more comprehensive as it involves replacing the glass with the frame, ensuring both parts are new and functional.
Complete window replacement improves performance and energy efficiency in cases of extensive damage or very old windows. Installing new replacement windows offers the chance to upgrade to modern, energy-saving designs that might offer better features than older models.
Professional window installers have the knowledge and tools to correctly find the problem and use the best solution. They handle any complications during installation and ensure that they correctly seal new units to prevent future moisture problems.
Temporary DIY Fixes
While waiting for professional repair or replacement, try these temporary measures to manage moisture in double-pane windows. It’s important to note that these short-term solutions will not address the underlying seal failure causing the moisture problem.
- Dehumidifier: Start by using a dehumidifier or air conditioner in a room with foggy windows. These reduce moisture and humidity in the air, which can lessen condensation on your window panes. This solution works best in rooms like bathrooms, where high humidity is a common cause of moisture issues.
- Hair dryer: Another DIY method is to use a hair dryer on your window panes from the outside of your home. Applying gentle heat helps evaporate the excess moisture trapped between the two glass layers of your double-pane windows. Move the blow dryer in a circular motion on the window to cover all areas of condensation. Applying this gentle heat reduces moisture buildup.
- WD-40: You can also try using a dehumidifying product designed for use with double-pane windows. WD-40 Original Spray is pretty handy for tackling window condensation. Just give it a quick spray on both sides of the window, and it helps absorb the moisture from the glass. It’s an easy and affordable short-term fix for keeping your windows clear.
- Proper home maintenance: Finally, don’t neglect your home maintenance. Check the sealant and weather stripping around your windows. Cracked and peeling weather stripping allows moisture in and causes condensation. Replacing any damaged sealant or weather stripping around your windows will help prevent future issues.
DIY vs. Professional Window Replacement
When addressing moisture issues in double-pane windows, you must decide whether to attempt a DIY fix or hire a professional. This decision depends on several factors, including the extent of the damage, your skill level, and the tools available.
Considerations for DIY Replacement
While DIY replacement might seem appealing to save money, it’s generally not recommended for double-pane windows. The process is complex and requires specialized tools and knowledge that most homeowners do not possess. Mistakes are costly and dangerous, leading to personal injury and further damage to the windows.
Improper installation voids warranties and leads to further problems, such as more seal failures or structural issues with the window frames. There is also the risk of not sealing the window properly, which lets in drafts and moisture, defeating the purpose of having double-pane windows in the first place.
Benefits of Professional Replacement
Hiring a professional window installer provides several advantages that far outweigh the potential cost savings of DIY methods:
- Expert diagnosis
- Quality materials and installation
- Warranty protection
- Code compliance
- Time and effort savings
Professionals have the expertise to accurately diagnose the moisture problem’s root cause. They determine whether the issue is only with the window unit or if there is a more systemic problem with the installation or drainage.
They also have access to high-quality replacement materials that many cannot easily purchase. Professionals employ the proper tools and techniques for secure installation, ensuring the new window units perform fully.
Furthermore, professional installation comes with labor warranties, offering added protection and peacefulness. This warranty extends beyond just the materials, covering any installation issues that may arise.
Another important benefit is ensuring compliance with local building codes and energy efficiency standards. Professionals know the rules about window installations and make certain they follow them. This helps avoid legal or financial problems later.
Professional installation also saves time and potential frustration associated with complex DIY projects. The experience and efficacy professionals bring to their work makes the process smoother and more reliable.
Window Replacement Costs
The cost of addressing moisture issues in double-pane windows varies widely depending on the chosen solution and the extent of the problem. Here’s a general overview of potential costs:
According to Angi, replacing glass panels generally ranges from $181—$412 per window. This is the most basic option and is viable if you catch the issue early.
New double-pane windows typically cost around $750 per window, not including labor, according to Angi. While this option is more expensive, it includes an entirely new setup with improved performance. Large or specialty windows can add between 25%-50% to the total cost.
To get an accurate estimate for a specific project, you should obtain quotes from at least three reputable local experts. This approach guarantees a fair price and allows for comparison of services offered. You should also inquire about potential discounts or financing options that might be available, which further reduce costs.
Preventing Future Moisture Problems
After addressing current moisture issues, you can take steps to prevent similar problems in the future. Prevention plays an important role in maintaining the efficacy and longevity of double-pane windows.
Regular maintenance is essential. You should inspect windows annually for signs of wear or damage, paying particular attention to seals and frame integrity. Early detection prevents minor issues from escalating.
Proper ventilation is another necessary preventative measure. Using exhaust fans in high-humidity areas like bathrooms and kitchens minimizes moisture buildup, reducing stress on window seals.
Controlling indoor humidity is necessary. Maintaining indoor humidity levels between 30% and 50% reduces the risk of condensation inside windows. Using air conditioners or dehumidifiers helps manage these levels effectively.
Addressing drainage issues is also a necessity. You should establish proper water drainage around windows to prevent water accumulation, which leads to moisture buildup and eventual seal failure.
Choosing quality windows is a significant preventative measure. When replacing windows, opting for high-quality units with good warranties ensures long-lasting performance and content
By implementing these preventive measures, you extend the life of your double-pane windows and maintain energy efficiency.
Final Thoughts About Removing Moisture from Double-Pane Windows
Dealing with moisture in double-pane windows is frustrating but a common issue. While temporary fixes help for a short time, fixing the main problem through a professional repair or replacement is usually the best long-term solution.
By knowing the causes of moisture buildup, recognizing the signs early, and taking prompt action, you protect your investment and maintain the comfort and efficiency of your homes.
Remember that prevention is key. Regular maintenance and attention to environmental factors go a long way in avoiding future moisture problems. With the right approach, you will enjoy clear, functional double-pane windows for many years, reaping the benefits of improved insulation and energy savings.
FAQs About Moisture in Double Pane Windows
A loose seal or seal failure almost always causes moisture between window panes. Seals fail from age, defects, temperature swings, impacts, or warping. When they fail, they allow outside air and moisture to enter the space between window panes.
Some common signs that show you may need window repairs include fogginess, condensation, bubbles in the sealant, visible seal cracks, seal gaps, and trapped dirt. Call a window professional to examine your windows immediately if you notice these signs.
No, you should not drill holes in the glass to fix condensation buildup in your windows. This fix doesn’t address the root cause of the seal failure, which allows moisture to enter your windows. A professional must replace the window glass or sashes to solve condensation problems.
Most homeowners are better off hiring a professional to avoid complex work and liability risks from mistakes during the installation process. Unless you have extensive knowledge and experience installing windows, you’ll be better off with a professional who can give you peace of mind and a labor warranty for added protection.
Double-pane windows can usually last between 10 and 20 years, though a number of factors, including weather and extreme temperatures, can lower this lifespan.
Condensation between window panes won’t go away on its own due to the lack of airflow, often leading to mold growth, which can harm your health and cause indoor allergy symptoms.
