Double glazed windows are a popular choice for homeowners looking to improve the energy efficiency of their homes. These windows are designed to keep your house warm in the winter and cool in the summer, thanks to the insulating layer of air or gas sealed between two panes of glass. However, if you’re feeling a chill near your double glazed windows, it can be frustrating and concerning. Why is cold air coming through, and what can you do about it? In this post, we’ll explore the common causes of cold air leaks in double glazed windows and offer practical solutions to keep your home cosy.
Common Causes of Cold Air Coming Through Double Glazed Windows
- Worn or Damaged Seals
One of the most common reasons for cold air entering through double glazed windows is worn or damaged seals. These seals are crucial for maintaining the airtight gap between the two panes of glass. Over time, exposure to the elements and general wear and tear can cause these seals to degrade, leading to drafts.
- Faulty Installation
If your double glazed windows were not installed correctly, they may not be properly sealed, allowing cold air to seep through. Gaps between the window frame and the wall, improper alignment, or inadequate sealing during installation can all contribute to air leaks.
- Broken or Cracked Glass
Damage to the glass itself can also be a source of cold air. Cracks or breaks in one or both panes of glass can disrupt the insulating properties of the window, allowing cold air to enter. Even small cracks can significantly impact the performance of double glazed windows.
- Condensation Build-Up
Condensation between the panes of glass indicates a failure in the sealed unit. When the seal fails, moisture can enter the space between the panes, leading to condensation. This not only reduces the insulating efficiency of the window but also often accompanies air leaks.
- Ageing Windows
Double glazed windows have a long lifespan, but they are not immune to the effects of ageing. Over time, the materials used in the construction of the window, including the seals, frames, and glass, can degrade. As the windows age, they become less effective at insulating, leading to cold air entering the home.
How to Identify the Source of Cold Air
To effectively fix the issue, you first need to identify where the cold air is coming from. Here are a few methods to pinpoint the source:
- Visual Inspection: Start by examining the windows for any obvious signs of damage or wear. Look for cracks in the glass, gaps between the window and the frame, or visible deterioration of seals.
- Feel for Drafts: On a cold day, move your hand around the edges of the window and feel for any noticeable drafts. Pay close attention to the corners and the edges where the window meets the frame.
- Use a Candle or Smoke Pen: Light a candle or use a smoke pen and move it slowly around the edges of the window. If the flame flickers or the smoke wavers, there’s likely a draft.
How to Fix Cold Air Leaks in Double Glazed Windows
Once you’ve identified the source of the cold air, you can take steps to fix it. Here’s how to address some of the most common issues:
1. Repair or Replace Worn Seals
Worn or damaged seals are a common cause of cold air leaks. Here’s how to address the issue:
- Inspect the Seals: Carefully check the seals around your windows for any signs of wear, cracking, or gaps.
- Replace the Seals: If the seals are damaged, you’ll need to replace them. You can purchase replacement seals from a hardware store. Remove the old seal and clean the area thoroughly before fitting the new one. Ensure the new seal is properly secured to prevent future leaks.
- Sealant Application: Apply a high-quality window sealant to any small gaps or cracks in the seals to provide an additional layer of protection.
2. Check and Adjust the Installation
If your windows were not installed correctly, you might need to make some adjustments:
- Inspect the Frame: Look for gaps between the window frame and the wall. If there are any gaps, they can be filled with expanding foam or a suitable caulk to prevent cold air from entering.
- Adjust the Window Alignment: If the window is misaligned, you may need to adjust it to ensure it closes tightly. This can often be done by adjusting the hinges or locks.
3. Repair Cracked or Broken Glass
If there is a crack or break in the glass, it’s important to address it promptly:
- Temporary Fix: For a temporary solution, you can use clear tape to seal a crack and prevent further damage until a permanent fix can be made.
- Replace the Glass: For a more permanent solution, the broken or cracked glass should be replaced. This is usually a job for a professional, as the glass needs to be carefully removed and replaced to maintain the integrity of the window.
4. Address Condensation Issues
Condensation inside the double glazing indicates a failure of the sealed unit:
- Dehumidify: In some cases, using a dehumidifier can help reduce condensation and minimise its impact.
- Replace the Glazed Unit: If condensation persists, the sealed unit may need to be replaced. This involves removing the old unit and installing a new one with properly sealed edges.
5. Consider Replacing Old Windows
If your windows are old and showing signs of significant wear and tear, it might be time to consider replacing them. New double glazed windows come with improved technology and materials that offer better insulation and energy efficiency.
Preventing Future Cold Air Leaks
To keep your double glazed windows performing at their best, regular maintenance is key:
- Inspect Regularly: Regularly check your windows for signs of wear and tear. Early detection can help prevent more serious problems down the line.
- Keep Seals Clean: Dirt and debris can cause seals to wear out more quickly. Keep the seals clean and free from dirt to prolong their life.
- Professional Maintenance: Consider having your windows professionally inspected and maintained. Professionals can identify and fix potential problems before they become serious.
Conclusion
Feeling cold air coming through your double glazed windows can be a frustrating experience, but with the right approach, it’s an issue that can be resolved. By identifying the source of the draft and taking appropriate action, you can restore the comfort and energy efficiency of your home. At Plastic Doctor, we specialise in repairing and replacing double glazed windows, ensuring that your home remains warm and energy-efficient. Contact us today to learn more about our services and how we can help you fix those pesky drafts for good.
Don’t let cold air spoil your comfort—take steps to fix your double glazed windows and enjoy a cosy home all year round!
