Blown windows, characterised by foggy glass or condensation between panes, are a common issue for UK homeowners. These signs point to a failed seal in your double glazing, which can impact energy efficiency, comfort, and even your home’s aesthetic. But do blown windows need replacing, or is there a simpler fix? In this blog, we’ll explore the key indicators that it may be time to replace your blown windows and what options you have to restore your home’s comfort and efficiency.
What Are Blown Windows?
Blown windows occur when the airtight seal between the two panes of a double-glazed unit fails. This allows moisture to enter the gap between the panes, creating condensation and fogging. While it might seem like a minor issue, a blown window can cause various problems, including loss of insulation and increased energy bills.
Key Signs Your Blown Windows Need Replacing
1. Persistent Condensation Between the Panes
Condensation inside your window panes is one of the most obvious signs of a blown window. Once moisture gets trapped between the glass, it’s impossible to clean, leaving your windows permanently foggy. If you notice persistent condensation, it’s a clear indication that the seal has failed, and replacement may be necessary.
2. Decreased Energy Efficiency
When the seal in double glazing blows, it compromises the insulation properties of the window. You might find your home feeling colder, with draughts around the window area. This loss of thermal efficiency leads to higher heating bills as your heating system works harder to maintain a comfortable temperature. Over time, replacing blown windows can be more cost-effective than continuing to lose energy through inefficient glass.
3. Higher Energy Bills
If you’ve noticed a sudden increase in your energy bills without changing your heating habits, your windows could be to blame. Blown windows allow heat to escape, which means your boiler or heating system has to work overtime. Replacing your blown windows can stop the heat loss and bring those bills back down.
4. Visible Damage to the Window Frame or Seal
While condensation and fogging are the most obvious signs of a blown window, it’s also important to check for visible damage around the frame or the seal. If the seal has cracked, warped, or deteriorated, this is a strong indication that the window is no longer functioning as it should. In such cases, replacing the window may be the best option.
5. Soundproofing Loss
Double glazing is not only meant to keep your home warm but also to block out external noise. If you suddenly start hearing more noise from outside, it could be due to blown seals in your windows. This loss of soundproofing can affect your quality of life, especially if you live in a noisy area. Replacing blown windows restores their insulating and soundproofing capabilities.
When Should You Replace Blown Windows?
Age of the Window
If your windows are more than 15-20 years old, it’s likely time for an upgrade. Technology has advanced significantly in recent years, and modern windows offer superior energy efficiency compared to older models. Replacing old, blown windows with modern double or triple glazing can improve your home’s energy performance and comfort.
Extent of the Damage
For windows with extensive seal failure or visible damage to the frame, replacing them is often the best solution. While some blown windows can be repaired, large-scale issues are better addressed with new, high-quality replacements.
Property Value Considerations
Replacing blown windows can enhance the appearance and energy efficiency of your home, making it more appealing to potential buyers. If you’re planning to sell your home, replacing faulty windows may be a smart investment that increases property value.
Can Blown Windows Be Repaired?
In some cases, repairing blown windows is possible. A professional may be able to replace the faulty seals without needing to change the entire window unit. However, this
is often a temporary fix, and in many cases, replacing the window will offer better long-term results, especially if the frame is also damaged.
For more detailed advice on whether your blown windows can be repaired or need replacing, visit our Window Replacement Services page or contact us at Cove Glass for a free assessment.
Benefits of Replacing Blown Windows
· Improved Energy Efficiency: New windows provide better insulation, helping you save on energy costs.
· Enhanced Comfort: Replacing blown windows eliminates draughts and temperature fluctuations, making your home more comfortable.
· Increased Property Value: Replacing faulty windows with modern units can boost your home’s curb appeal and value.
· Reduced Condensation and Moisture Issues: New windows with functioning seals prevent condensation build-up, maintaining clearer views and healthier indoor air quality.
Have a look at our Window Replacement Services to see what we offer. For expert advice or to arrange a free consultation, contact Cove Glass at 01252 318787 or email sales@coveglass.co.uk.
FAQs
Q1: Can I just repair the seal on a blown window?
A1: In some cases, you can repair the seal without replacing the entire window, but this is often a temporary fix. For long-term results, replacing the window is generally more effective. Have a look at the Government regulations for replacing windows in your home.
Q2: How long do double-glazed windows last before they blow?
A2: Double-glazed windows typically last between 10 to 20 years. The lifespan can vary depending on the quality of the installation, materials, and local weather conditions.
Q3: Will replacing blown windows improve my energy bills?
A3: Yes! Replacing blown windows restores the insulating properties of your double glazing, helping to reduce heat loss and lower your energy bills.
