How to Repair Double Glazing Windows

If you have double-glazed windows it is possible that you will encounter issues with gaskets, hinges, and handles. It is often possible to fix these problems without replacing the entire window, thereby saving money and time.

A common issue is condensation that has accumulated in the space between the two glass panes. This is a sign that the window must be fixed.

1. Broken Panes

A damaged double pane of glass can expose your home to the elements. It is not always necessary for the entire window sash to be replaced to resolve this issue. Double pane windows can be fixed by using an adhesive that is specifically designed to be placed inside the cracks.

This short-term fix is often used to prevent superficial cracks (such as stress cracks) from getting worse and can happen when the temperature changes cause the glass to expand and contract. In double glazing repairs near me that your glass has shattered or cracked, it might be necessary to completely take the damaged glass off and replace it.

Sometimes, the seals between the two glass panes can get damaged or worn-out, causing condensation and misting of windows. These issues are usually caused by moisture trapped between the glass panes or seeps into the wall through the window frame. Whatever the cause moisture is a problem for your double glazed windows as it can cause mold and water damage that can be costly to take care of.

You can attempt to fix the problem by wiping down the windows of your double-glazed windows with cold, lukewarm water. This will temporarily resolve the issue, especially in the case of humid and warm outside. You can also utilize a dehumidifier to help cool the room by using double-glazed windows. This is particularly helpful in summer.

If the problem persists an expert in double glazing is able to visit your home and clean the space between the panes of your glass. They can also use tools to create a line of score around the perimeter of your windows where you need to cut the glass using a glass cutter (inexpensive cutters are available in hardware stores). After that, take out all the glazing points out of your window opening. This should be done while the sash is still in place, however it is possible to work on a flat surface such as a table.

2. Seals

The window seal is a crucial component of double glazing. It plays a vital function in keeping your home energy-efficient, draught-free, and safe. The seal is placed at the outer edge of uPVC frames and forms an airtight seal inside the space between the two panes of glass. This is a crucial component of the insulation that double glazing can provide and any issues or failure to the seals will significantly reduce this benefit.

If your seals aren't performing their job, the result is condensation between the panes. This is not only unsightly, but it can also lead to dampness and mould within the home. It can damage walls, furniture, floorboards and cause serious health issues for those with respiratory conditions like asthma.

The positive side is that a majority of double glazing manufacturers will offer repair services for windows without replacing the entire unit. This is not only less expensive, but also quicker and more sustainable. In the meantime, there are a few DIY options such as caulking to stop leaks and moisture penetration or lengths of self-adhesive rubber seals that can be affixed directly to the window frame's junction frame and sash.

In the majority of cases, the simplest and most effective way to deal with damaged window seals is to call in an expert. They can repair the window seal, and also prevent moisture and air from entering your home, which can cause expensive damage.

Make sure you know the warranty duration of your double glazing. It is usually between 10 to 20 years. This could save you money in the event that seals have failed and the windows have to be replaced. Some installers will drill holes in the misted double glazing to remove the moisture and make a new seal. This will prevent it from misting again in the future. However, this can be temporary and a plug needs to be inserted into the hole in order to keep it sealed.

3. Locking Mechanisms

Double-glazed windows have air gaps between the glass panes for insulation against changing temperatures outside and to maintain warm inside the house. This type of window is also referred to as an Insulated Glass Unit (IGU). These windows can save you money on heating bills by reducing energy consumption. But, they're not durable and there are some issues that could arise that require double glazing repairs.

Many of these issues are easy to fix and are less expensive than replacing the entire window. A company that offers double glazing repair will ensure the job is completed correctly and with minimal fuss. Often these companies will provide no-cost quotes to allow you to evaluate the cost and quality of their work.

It is important to check the warranty included with your double glazed window, as this will usually cover the cost of repairs. This is a common feature of most double glazing installation and is typically for 10 or 20 years although some companies have even offered lifetime guarantees.

If you are unable to open your double glazed window or it appears there is a cloud of mist between the panes then this could be due to the seal blowing. This can occur when the frame of the window moves slightly, or if the packaging that holds the sheets of glass in place becomes damaged with time.


There are many ways you can repair windows with double glazing yourself, but it is generally better to hire a specialist firm. Always adhere to the guidelines of the manufacturer and use the right tools. It is important to keep in mind that if you attempt to remove the glass yourself then you'll be breaking any guarantee you might have and may end up paying a higher cost than if you simply made contact with the company from whom you purchased the windows.

After removing the broken glass then you can replace it with plastic spacers. This will ensure that the replacement is compatible with the frame. You can also add any uPVC beads you require. After that, you can install the gasket of a new wedge and lock the window in place.

4. Weatherproofing

There are solutions for double glazing windows that are difficult to open, or that have sagged. You can oil the hinges, handles or mechanisms to see if this helps. You can also replace gaskets to improve your windows' performance and prevent them from let in cold air and drafts. These are available in a hardware store or on the internet. They are easy to install. You can seek out a professional if you don't want to tackle it yourself.

If you've got condensation between your window panes, this is also a problem which can be fixed easily. It is caused by an unsound window seal that allows moisture to get in between the glass panes. This could cause a mist to form on the glass, which is both undesirable and ineffective.

Anyone with some DIY expertise can easily swap out gaskets. Gasket sealer is crucial for a strong seal and will help reduce energy bills. Alternatively, you can use a calk to fill any gaps and give your windows an extra boost in their weatherproofing.

The seals can also fail on double-glazed windows. This can happen due to paint being applied near the windows, property renovations or general wear and tear. If you notice that your double-glazed windows have started to fog, it is important to get them fixed as soon as possible.

Double-glazed windows can be a wonderful addition to any home. They offer windows that are energy efficient and secure which keep the warmth inside and the cold outside. There are instances when replacing a double glazed windows is the best option. This could include frames that are damaged or broken, or panes that are not suitable for double glazing.