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What Causes Blown Double Glazing?

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What Causes Blown Double Glazing?

What causes blown double glazing? Double glazing units are made up of two panes of glass that are separated by a small gap filled with air or an insulating gas such as argon. The gap provides a thermal barrier that helps to keep heat inside the home and reduce energy bills. However, if the seal around the glass panes fails, air can enter the gap, causing condensation to form between the panes. This condensation can appear as a mist or fog on the inside of the window and can make it difficult to see out.

There are several reasons why the seal around double glazing units may fail, including:

Age: Over time, the sealant around the glass panes can become brittle and crack, allowing air to enter the gap.

Poor installation: If the window was not installed correctly, the seal may not have been applied correctly, leading to premature failure.

Extreme temperatures: Sudden changes in temperature can cause the sealant to expand and contract, eventually leading to failure.

Physical damage: If the window is struck or damaged, the seal can be compromised, allowing air to enter the gap.

How can blown double glazing be repaired?

If you have noticed condensation forming between the panes of your double glazing, it is likely that the unit has blown and will need to be repaired or replaced. Here are some options for repairing blown double glazing:

Seal replacement: If the sealant around the glass panes is the only part that has failed, it may be possible to replace the seal without replacing the whole unit. This is a relatively quick and cost-effective solution, and it can extend the life of the window by several years.

Can You Tell Me What Causes Blown Double Glazing?

Glass replacement: If the glass panes themselves are damaged or cracked, they will need to be replaced. This is a more expensive solution than seal replacement, but it may be necessary if the damage is significant.

Full unit replacement: If the double glazing unit is old or has sustained significant damage, it may be more cost-effective to replace the entire unit rather than attempting to repair it. This is a more expensive option, but it will provide a longer-lasting solution.

When it comes to repairing blown double glazing, it is important to choose a reputable and experienced glazing company. They will be able to assess the damage and provide you with a range of options for repair or replacement, as well as an estimate of the cost and the time required to complete the work.

Preventing blown double glazing

While it is not always possible to prevent blown double glazing, there are some steps that you can take to reduce the likelihood of it occurring:

Choose a reputable glazing company: Ensure that your double glazing is installed by a reputable and experienced company to reduce the risk of poor installation.

Regular maintenance: Regular cleaning and maintenance of your double glazing can help to identify any issues early on, before they become more significant.

Avoid sudden temperature changes: Try to avoid sudden changes in temperature around your windows, as this can cause the sealant to expand and contract, leading to failure.

Don't slam doors or windows: Slamming doors and windows can cause the sealant around the frames to weaken and allow water ingress.