8 Common Window Problems and How to Solve Them
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At Encore Home Improvements, we understand how essential your windows are to both comfort and energy efficiency in your home. Over time, windows can start showing signs of wear and tear. While the average lifespan of windows is between 20 and 25 years, factors like humidity and poor installation can speed up the aging process. Below are the eight most common window problems we often encounter, along with our recommended solutions.
1. Condensation on Windows
Condensation occurs when warm, moist air comes in contact with a cold window surface, causing water droplets to form. This can happen when the window is cooler than the surrounding room. If high humidity levels are contributing to the problem, it could lead to mold growth and even structural damage.
Solution:
- Encore Home Improvements recommends checking humidity levels using a hygrometer.
- Ensure that dehumidifying systems are working properly in your home.
- If the issue is caused by water infiltration, it’s crucial to address the source immediately to prevent further damage.
2. Ice at the Bottom of Windows
Ice can form at the bottom of windows due to high humidity or poor installation. Retrofit installations can sometimes leave gaps that allow cold air to infiltrate, causing ice buildup.
Solution:
- We recommend properly insulating the window sash and ensuring correct installation to prevent cold air infiltration.
- If the problem continues, a full window replacement may be necessary.
3. Air Leaks Around Windows
Air leaks can lead to significant energy loss, which raises heating costs. If you feel drafts around your window frame, it’s a sign that the casing may be damaged.
Solution:
- Encore Home Improvements suggests sealing gaps with caulk or using plastic insulation for older windows.
- Consider a full energy-efficiency assessment to reduce heat loss and improve comfort in your home.
4. Water Infiltration Around Windows
Cracks in caulking or improperly installed window flashing can allow water to seep in, causing damage to your home.
Solution:
- Ensure caulking is applied correctly around the window (16mm width and 12mm thickness).
- Install continuous window flashing with the proper slope and sealing to prevent water infiltration.
5. Difficulty Opening and Closing Windows
Shifts in your house’s structure over time can cause windows to become misaligned, making them hard to open or close.
Solution:
- Never force crank windows. Let the locking mechanism handle the closing.
- For newer models, replacing defective parts can restore smooth operation.
6. Deterioration of Wooden Frames
Wooden window frames, especially in older homes, are more vulnerable to deterioration caused by weather and insects. Over time, water infiltration can cause cracking, peeling paint, and mold growth.
Solution:
- If the deterioration is severe, Encore Home Improvements recommends replacing the windows with more durable materials such as PVC or aluminum.
- Repainting may not be sufficient to address extensive rot, so replacing the frames will provide a more permanent solution.
7. Foggy Windows
Foggy windows are often caused by a failing silicone seal between the panes. This is particularly common in windows with aluminum spacers, as metal is more conductive than PVC and can cause condensation to form between the panes.
Solution:
- We recommend replacing the thermos to eliminate fog.
- For better insulation, consider double-glazed windows filled with argon gas.
8. Thermal Breaks
Thermal breaks occur when windows crack due to extreme temperature fluctuations. This can cause the glass to expand unevenly, resulting in cracks.
Solution:
- Replace cracked glass immediately to avoid further damage.
- To prevent future thermal breaks, maintain a stable temperature around the window and use curtains or blinds to shield the window from sudden temperature changes.
We’re dedicated to helping you resolve any window problems you may encounter. If you notice any of these issues, don't hesitate to reach out.
Our team of experts is here to provide professional advice, repairs, and replacements to ensure your home remains comfortable and energy-efficient.

