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How to Repair Double Glazed Windows

Many homes with double-glazed windows experience problems such as condensation, a decrease in insulation and windows that are difficult to open. These issues are usually a result of a problem with the hinges, mechanisms or handles.

You can repair these windows by following a few simple steps.

Cracked Panes

If a double-pane windows is damaged, it's a major issue that needs to be addressed immediately. Triple- and double-pane windows are insulated by gases that ensure warm air is kept in during winter and cold air out, so when one of the panes cracks the gas escapes and your home becomes less well-insulated. Cracks can also become worse as time passes. Repairing them now will prevent a larger problem in the near future.

The most important thing to do when you notice cracks is to determine what caused it. It's possible that a collision or structural issue led to the crack. In this case it's crucial to examine your windows for damage and determine the next steps to take to fix the issue.

It's also recommended to check the surrounding area of your home for any other problems which could be contributing to the crack. For instance the windows are situated near walls and doors The stress of contraction and expansion caused by temperature changes may be causing the cracking.

There are several ways to fix a crack depending on the source. For instance, if it was caused by an impact, you may be able to get away by replacing only the damaged pane of glass. Or, you may need to replace the entire frame of your window. This is a more complicated solution and requires the assistance of an expert.

If you're facing a crack that did not cause the frame to move, it's generally simple to put an adhesive between the damaged panes. This will repair the crack and prevent further damage to your window.

Another option that's simple is to cover the crack with clear tape. This isn't the best appearance, but it can stop bugs and drafts from entering your home. An alternative is a glass repair film made to be easily applied and offers more durable protection. Many double glazing companies offer this kind of product, and it's worth the cost to protect your windows.

Condensation Build-Up

Double glazing windows that require to be fixed are often because of condensation between the panes. This is because it usually indicates that the seal between the two panes of windows has broken and allowed water vapour to get in. This moisture can cause condensation and other issues which may require replacement of the window.

Double glazing is much better at lessening condensation than single pane windows as it features an area between the glass that is either filled with air or gas that is not toxic. The space is separated from the frame by a spacer bar, which acts as an insulator to help stop heat loss. In a lot of cases, the spacer bar is stuffed with a silica gel which is extremely effective at taking in moisture and preventing it from leaking between the glass panes.

It is therefore essential to clean and regularly clean your windows. This will decrease the amount of moisture that is accumulated and let it evaporate. Utilizing extractor fans or opening the windows to create more airflow can also help to remove moisture.

Installing a dehumidifier can be another option to prevent condensation. These units are available for between PS60 and PS150. They are a great investment that not only stops mold growth, but also reduces condensation.

Condensation between the glass panes of your double-glazing could occur because the air outside is colder than the inner window pane, causing the surface to cool and form condensation. It can also occur when you alter the temperature of your home, for example by switching off or turning on the heating.

Unfortunately, condensation can also be an indication of a poor double glazing design because some older units are constructed using rubber strips instead of the more modern silicone version, which can deteriorate over time. It may be possible to repair your seals, however this is only a temporary fix, as the window will eventually fail in a different location.

Stained Glass

If you're having trouble with a double glazed window handle or lock, it is often possible to repair it instead of having to replace the entire glass pane. But, upvc repairs isn't always a DIY project since special tools are required to ensure the repair is done properly and doesn't compromise the seal or function of the window.

The majority of homeowners with double glazing complain that their doors or windows are difficult to open. This could be due to a slight warping in the frame or hinges, but it could also be due to issues with the seal. In some instances, the issue may be more severe than this and it is recommended to speak with a professional about the possibilities available.

Condensation between glass panes is a common complaint. This could be an indication of a failing seal that is not retaining the insulating gases between the glass panes. This is a simple fix. The gas that is insulating can be restored by using an adhesive that is specifically designed to close the gap.


Start by placing the broken window on a flat work surface. Peel off the black sealant gently to reveal the silver spacer bars. Cut them into pieces using a sharp knife. Keep your cut just below the bottom of both the glass and the spacer bars. After you have separated the two pieces, place the top glass pane on the work surface. It is recommended to use gloves for this step. Clean both the glazed surface that is facing into the frame and the spacer frame, taking care to remove any marks or smears since these can impact on the seal when the window is re-assembled. Last but not least, position the new spacer on the glass pane. Spread some adhesive around the edges to help it stick to the glass and silver spacer frame. Allow to set before re-assembling. It is recommended to have two people do this job since it may be difficult to set everything in the right place.

Gasket Seals

Although double glazing is extremely durable and is designed to last for a long time to come, there are still issues that can arise from time to time. From draughts, to problems with closing or opening it is essential to fix any issues promptly to prevent them from becoming worse.

One of the most common problems faced by double-glazed owners is condensation forming between the two glass panes. This is usually caused by an issue with the desiccant that absorbs moisture from the air inside the gaps that are insulated. Once the desiccant has failed it can cause condensation to form in minutes and form an ugly line across the windows.

Another issue that could arise is when the gasket seal is not able to keep water and other contaminants out of the gap. This can cause leaks around the edges of the frame, and can also damage the surface of the double-glazed unit itself. If you observe any indications of a leak in your double-glazed units, it is essential to contact your installer as quickly as you can.

Many companies will provide a warranty for their products, and they usually come with a guarantee period of 10 or 20 years, and some even offer lifetime warranties. It is essential to review the specifics of your guarantee to see what it covers and until when it expires.

It might be worthwhile trying to resolve any hardware issues yourself prior to calling your double glazing provider to request repairs. For instance, you can try cooling the mechanism or oiling it to see if that resolves the problem. You could also try cleaning the handle or window handle prior to installing it.

It is also important to check whether your local council has insulation grants that can assist in the repair or replacement of your double glazed windows. There are several ways to apply, and certain areas might require proof of eligibility or a particular form of application. It is worth checking with your local authority to see what they need to know.

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