Repairing Double Glazed Windows

When double-glazed windows "blow" in the wind, the gas that insulates them, argon, escapes, causing them to decrease their energy efficiency. The good part is that blown double glazing can be repaired without having to replace your windows completely.

Moisture or condensation in between your double glazed windows is the most frequent sign that the seals on your windows have failed. A professional can fix this, saving you from having to replace the window.

Take off the Sash

Double-glazed windows can add value and elegance to your home. They also improve the energy efficiency of your home, keeping the cold out and the warmth in. With Minnesota's harsh winters, double-glazed windows can help reduce your heating bills.

The main difference between double and single windows is the gas that fills the space between panes of argon or air. This makes a huge difference to the insulating properties of your windows as they stop the transfer of heat through the glass. Selecting an inert gas with low thermal conductivity, such as argon or Krypton which can help increase your window's insulating properties even further.

Another benefit of having double glazed windows is that they are more secure than single pane windows. They are harder to break and can be fitted with modern security locking systems installed. They can be equipped with toughened or laminated glass to make them safer. Double-glazed windows are more sturdy, and less likely than single-glazed windows to shake or vibrate in the wind. They are a great choice for older homes.

Additionally, double-glazed windows can be made with low energy glass which reduces UV rays entering your home. This can help ensure that your carpets, paintings, and furniture from discoloration. This is particularly helpful when your windows are exposed to direct sunlight for much of the day.

Retrofitting a sash window that is old with double glazing is cheaper than purchasing new windows. The interior linings, cladding, and opening mechanisms of your current windows are not damaged, so the work is less demanding.

As an added bonus as an added benefit, the installation of double glazed windows is a lot faster than the process of removing and replacing a complete window. This means you get the benefits of energy efficiency and security enhancement, as well as reduced glare, and UV damage on your furniture at a lower cost.

Remove the Glass

Double-glazed windows differ from single pane windows in that they are made up of two glass panes separated by an air layer and the spacer. This provides insulation. This is known as an insulated unit (IGU) which is filled with gases such as Krypton or argon, can provide even better insulation. As time passes, these units can become damaged and fail to perform properly. It is important to remove any broken glass as safely and swiftly as you can.

Replacing double-glazed windows can be a daunting DIY project that requires specialized tools and expertise. This is why it's often best left to a professional who is able to utilize the appropriate safety equipment and follow the correct procedure to prevent injuries.

This is particularly important since double-glazed windows are extremely fragile and can easily break or crack. Wear a respirator, gloves and mask to protect yourself while repairing the window. You should also make sure that the the frame is free of debris. You should also put a thick piece of plastic over the area where the deglazing tool will score to catch any broken pieces of glass and make them easier to remove.

It is crucial to identify signs of double-glazed windows that aren't working properly. A draughty window is one of the most frequently observed signs that your IGU has blown and isn't providing the proper insulation. You can also see if your windows are cloudy, or if there is condensation between them.

Double glazing is not just an opportunity to reduce energy costs but also protect your furniture from light and heat. Furniture can break and fade when exposed to sunlight for extended periods of time, however double-glazed windows keep your furniture out of direct sunlight and will reduce the amount of heat that comes into your home.


In addition to being a great method to cut down on electricity costs, efficient double glazing can also increase the value of your property. Installing window repairs glazing is a good investment if you intend to sell your house in the future.

Remove the Gaskets

Double glazing is a well-liked option to boost your home's energy efficiency however, like all other things windows, it is prone to wear and wear and tear. Double-glazed windows that show visible damage, are draughty or are prone to condensation must be fixed or replaced.

The gasket is a crucial component of the window. It is a neoprene-based rubber seal that cushions and shields the glass from weather. Gaskets that are damaged are a common reason for leaks and water infiltration into buildings. Fortunately, the seals can be replaced without replacing the whole window.

Most often, gaskets can be repaired by pulling them off. It is simpler to repair uPVC frames rather than timber or aluminum. If you're unable to remove the seals by hand it's best to use a knife to cut off the seal until you can grip it using your fingers. After the seal is removed, you can put in the new seal to ensure the best fit and efficiency.

After the seals are replaced, the window beading must be removed. You can make use of a lead or putty knife to remove the window beading. Insert the blade of the knife between the frame and bead, in the middle of the longest bead. This will give you the maximum leverage to remove the bead from the frame.

After removing the beading you can take off the window glass. To ensure optimal thermal performance, the distance between two panes needs to be 12mm. Argon gas should be used to fill this space. It is possible to increase the gap between your panes in order to reduce noise, but this could affect the insulating properties of your windows.

It's a good idea spray the window cleaner on the frame after it has been cleaned. This will assist in helping the DGP adhere better. This will prevent the tape from adhering to the glass in a flash, giving you time to position it correctly. To avoid any damage, it's recommended to wipe the rubber seals down using a soft rag and warm soapy water.

Seal the window

If you notice that your double-glazed windows are fogging up or you have moisture between the panes, then it may be time to replace them. This type of problem is a clear indicator that the seal inside has failed to keep the insulation gases in. It is not unusual for the rubber seal that holds in the gases that are insulating to wear out over time or due to an improper installation.

A skilled window specialist will reseal each individual gap by applying a new seal. The technician will fill the gaps with silicone caulk. This will keep winter cold air out and the warm indoor air in. This caulk will stop insects from getting into your home and will also stop moisture from entering.

Re-sealing double glazed windows is not a DIY-friendly task. But, it is possible. It is a tedious and time-consuming task that requires special tools to remove the old caulk, clean the area, and apply a new caulk. It is recommended to hire an experienced glazier to complete the job to avoid injury and to ensure that it is done correctly.

There are some cases in which double-glazed windows is not repairable and it will need to be replaced. This could be due to cracked or shattered glass, severe damage to the frame, or serious rot. Talk to a double-glazing professional to determine the best option for these scenarios.

Often, the misting of the windows can be a sign that the treatment of the glass in the factory has failed. The factory will put a low-emissivity coating to the window to reflect heat. They may also inject argon for extra insulation. When these treatments fail, moisture is allowed to get into the gaps between the glass panes, and it could cause condensation. A professional can solve this problem by drilling tiny holes into the glass panes, and then injecting an agent that dehydrates to eliminate the moisture. The professional will then fill the gap with a new insulating gas, and seal it without the gas from escaping.