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How To Tell When Double Glazing Has Failed

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  • Admin
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  • Double Glazing Failure, Window Maintenance Tips, Home Improvement, Identifying Window Problems, Energy Efficiency Issues
  • Posted date:
  • 07-02-2024
How To Tell When Double Glazing Has Failed

We ask: how to tell when double glazing has failed? Learn how to identify signs of double glazing failure. Discover key indicators such as condensation between panes, draughts, and visible damage. Get expert advice on diagnosing double glazing issues and understand the steps needed for effective repairs or replacements. 

What Happens If My Glazing Unit Fails?

A double-glazing unit is an important part of your home's insulation system. Made up of two panes of glass separated by a gas cavity, it helps to keep out weather conditions and control the temperature inside your home. So, what happens when your double-glazing unit fails? Here is what you need to know.

First off, when a double-glazing unit fails, it no longer retains its insulation capacity as it once did. Failed double glazing may allow cold air to creep into your house. This causes a discomforting difference in room temperature. This problem will, unfortunately, increase your energy bills as you could feel the need to crank up the heating system.

To add salt to the wound, a failed double glazing also lets in more noise from outside. This is because the gas cavity that usually acts as a soundproofing layer is affected. This can result in annoying noise transmission, disrupting your peace.

You could experience a build-up of condensation between the glass panes. This happens when the seals are damaged due to age, wear, or poor installation, allowing humid air to leak into the unit. The increased humidity inside the unit results in condensation. The humidity tarnishes the appearance of your windows and obstructs your view.

Unfortunately, there might also be visible damage to your double-glazed windows. Cracks, chips, and leaks are tell-tale signs of a damaged double-glazing unit. These visible damages can affect the integrity of your unit. It may also lead to more complex damages if left unchecked.

How To Tell When Double Glazing Has Failed? Double Glazed Windows Kent

How To Tell If Your Double Glazing Has Failed? 

Detecting if a double-glazing unit has failed is not always straightforward. Yet, several signs can help you make an informed judgement. Let's discuss these signs in detail.

Condensation between the Panes: One of the first signs of a failing double-glazed window is condensation or fogging. These tend to appear between the glass panes. This is due to the gas cavity becoming compromised, allowing space for water vapour to condense.Drafts or Cold Spots: You may notice chillier temperatures near your windows, or drafts sneaking into your rooms. This is a strong sign that your double-glazing has failed. This often results in increased energy bills and reduced comfort in your home. Be sure to check for condensation between the panes as well. Time to call a professional!

Noise Transmission: Failed double-glazing often means a higher level of noise seeping into your home. This is due to problems with the gas cavity and the weather seal. The noise can lead to an uncomfortable living environment, affecting your peace and overall quality of life.

Fogging and Frosting: When the seal fails, trapped moisture can cause fogging or frosting. This is because the seal is meant to keep out moisture and air. Once compromised, it lets in dampness, leading to condensation issues between the glass panes.

Increased Energy Bills: A sharp hike in your energy bills often suggests you are losing heat through your windows. This is a typical sign of double-glazing failure. Make sure to check for drafts and condensation. These are also common indicators that your windows need repair or replacement.

Visible Damage and Deterioration: Look for visible signs of damage like cracks, chips, or broken seals. Discoloured or peeling seals, water leaking, and rotten window frames are strong signs. Your double glazing will need attention as quickly as possible.

The Costs Of Fixing Double Glazing Units

Replacing or repairing failed double-glazing units can be expensive. Yet the cost varies depending on several factors. For instance, the size of your windows, the nature of the damage, and whether you choose to repair or replace the glazing unit all impact the cost.

A professional repair of a single window can be quite affordable. However, if the damage extends beyond the seals and into the window frame itself, the cost would increase.

If the gas cavity is affected, replacement might be the only viable option. Keep in mind that while the upfront cost can be extensive. Replacing failed double-glazing units can result in long-term savings on your energy bills.

The Costs Of Fixing Double Glazing Units

Additionally, improved window performance can enhance the overall comfort of your home. Doing so can also increase its market value. Regular maintenance can also prolong the life of your windows, saving you money in the long run.

Can I Replace Double Glazing Myself?

Replacing double-glazing units is a task that requires a certain level of expertise. It involves the removal of old seals and the installation of new glazing units. Doing this ensures airtight seals, and correct framing, amongst other complex tasks.

Proper measurement and handling are essential, as they help to avoid any damage. It is often recommended to seek professional assistance for the best results. The process becomes even more detailed and critical with more factors such as weatherproofing and alignment checks.

The DIY approach may seem attractive to reduce costs, but it could lead to problems if it is not carried out efficiently. Damages resulting from amateurish work can increase the issue. This will lead to greater repair costs in the long run. The performance of your double-glazing units can be compromised if they aren't properly installed. So, opting for a professional service is usually the wisest option.

A qualified glazing technician will ensure that the new units are properly fitted. That way, your home remains energy-efficient and safe. Their expertise can save you both time and money while providing peace of mind.

Double-glazing also offers advice on the best materials for your specific needs and helps you choose the right options for your home. Having a professional handle the installation ensures longevity and optimal performance. This can help enhance the value of your property.

Can I Replace Double Glazing Myself?

Preparing Your Home For Double Glazed Windows

Before getting new double-glazed windows installed, there are a few preparation steps to take. These are important for the smooth functioning of the replacement process. They ensure you reap all the benefits offered by your new glazing units.

Start by clearing the area around your windows both inside and outside. This provides easy access for the installation team. Ensure your window sills are cleared of any objects and furniture is moved away. Remember, this process can create dust, so cover your belongings as needed.

Keep pets and children away from the area to ensure their safety and avoid disruptions. If you have any delicate items nearby, consider relocating them temporarily. It may also be helpful to vacuum or sweep the area beforehand to make the clean-up easier.

Ensure that there is a clear path from the entrance to the windows to help the movement of tools and materials. It's also crucial to discuss ventilation issues with the installation team. Double-glazing reduces the ventilation in a room. It's important to discuss this in advance, especially if you live in a more humid environment.

Check if you need to get any permissions in advance. This is especially important for those with listed buildings or in conservation areas. For more information, please feel free to get in touch with local professionals during opening hours. They will be more than happy to provide advice on how best to deal with double-glazing failure.


Are you looking for double glazed window repair in Kent and the surrounding areas? At Window Fix Direct Kent, we offer a range of double glazing services - all provided by our team of professional specialists.