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How Repairing Double Glazed Windows Can Be Your Next Big Obsession
Repairing Double Glazed Windows

Double-glazed windows "blow" the insulating argon escapes causing the window to lose its energy efficiency. The good news is that blowing double glazing is usually repaired without needing to replace the windows.

Moisture or condensation in between your double-glazed windows is the most common sign that the seals on your windows are failing. It can be easily repaired by a professional, saving you the cost of a new window.

Remove the Sash

Double-glazed windows can add value and elegance to your home. They increase the energy efficiency of your home by keeping cold and heat out. In Minnesota's winters that are harsh, having double-glazed windows will help you save on heating costs.


The primary difference between single and double glazed windows is that the space between panes of glass is filled with air or an inert gas, like the gas argon. This can make a significant difference to your windows' insulation capabilities, as it prevents heat from transferring through the glass. Selecting an inert gas that has low thermal conductivity, such as argon or krypton which can help increase your window's insulating properties even more.

Another benefit of having double glazed windows is that they are more secure than single paned windows. They are less likely to be broken and can be fitted with modern security locking systems installed. They can be fitted with toughened or laminated glass to make them even safer. Double glazed windows are more sturdy and less prone to sway in the wind or from the vibrations of heavy traffic which makes them a great option for older homes.

Double-glazed windows can also be constructed of low-energy glass which reduces the UV rays entering your home. This will protect your furnishings, carpets and paintings from fading. This is especially useful for windows that are directly in the sun for most of the time of the day.

Retrofitting a sash window that is old with double-glazed windows is cheaper than buying new windows. The cladding, internal linings and opening mechanisms of the existing windows are still in place, which means the work is less intrusive.

Installing double-glazed windows is faster than removing a window and replacing it. This means you can get the benefits of energy efficiency and enhanced security, as well as less reflections, and UV damage to your furniture for a less cost.

Remove the Glass

Double glazed windows are different from single pane windows as they feature two glass panes, separated by an air layer and an air spacer. This creates insulation. The insulated glass unit (IGU) can be filled with gases like Krypton or argon for more insulation. These units can become damaged over time and stop working properly. It is important to remove any broken glass as safely and quickly as possible.

It isn't easy to replace double-glazed windows on your own. You'll need specialist tools and expertise. This is why it is typically best left to a professional who can utilize the appropriate safety equipment and follow the correct procedure to avoid injuries.

This is especially important because double-glazed windows can be very fragile and easily break or even crack. Wear a respirator, gloves and mask to protect yourself while repairing the window. Make sure the area around the window frame is free of any debris and clean. You should also put a large piece of plastic over the area that the deglazing tool is going to score to take any broken pieces of glass and make them easier to remove.

It is important to look for signs of double-glazed windows that aren't working properly. A draughty windows is one of the most obvious signs that your IGU is blown and is no longer providing adequate insulation. It is also possible to determine whether your windows are cloudy, or the presence of condensation between them.

Double glazing is not only an opportunity to reduce energy costs but also to shield your furniture from heat and light. Furniture can deteriorate or break if exposed to direct sunlight for an extended duration. A double-glazed window keeps your furniture out of the sun and reduces the amount of heat entering your home.

Double glazing that is energy efficient can enhance the value of a home. If you're looking to sell your home in the future, having double glazing installed is a great investment that can attract prospective buyers.

Remove the gaskets

Double glazing is a popular option to boost your home's energy efficiency however, as with all things windows, it is prone to wear and tear. Double-glazed windows that show obvious damage, show draughts or are susceptible to condensation need to be repaired or replaced.

A crucial component of the window assembly is the gasket, a butyl or neoprene rubber seal that cushions the glass and offers weather protection. The deterioration of gaskets is the main reason for leaks and water infiltration into buildings. Fortunately, the seals can be replaced without having to replace the whole window.

Gaskets can often be repaired by pressing them down and then pulling them out. This is simpler on uPVC frames than on timber or aluminium. If you're unable to remove the seals by hand it's best to use a knife to cut off the seal until you're able to grasp it with your fingers. After the seal is removed, you can apply the new seal to ensure the best fit and efficiency.

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

After removing the beading, you can then remove the glass. For optimum thermal efficiency, the gap between two panes needs to be 12mm. Argon gas should be used to fill this space. A wider gap can be used to reduce the noise level, but it will lower the insulating performance of your windows.

After the frame is cleaned it is recommended to spray it with window cleaner before fitting the DGP. This prevents the tape from immediately adhering to the glass, and gives you a chance to position it correctly. It's also a good idea to wipe the seals with an absorbent cloth and warm soapy water to avoid any damage.

Re-seal the window

If you notice that your double-glazed windows are becoming cloudy or you notice that there is water between the panes it might be time to replace them. These kinds of issues are a clear indication that the seal inside isn't keeping the gas that is used to insulate. It is not unusual to find the rubber seal that keeps in the insulating gases to degrade over time or due to inadequate installation.

Read Home who is experienced will seal each gap by applying a new seal. The technician will use silicone caulk to fill the gaps. This will keep cold winter air out while allowing the warm indoor air in. The caulk also stops bugs from entering your home and it will prevent moisture from getting into your home, too.

It is important to note that resealing an existing double-glazed window is not a DIY project, although it is possible to tackle it yourself. It is a laborious and time-consuming job that requires specialized tools to get rid of the caulk that was used, clean the area, and apply a new one. To avoid injury and ensure the job is done correctly it is best to employ a professional complete the job.

In some instances double-glazed glass windows cannot be repaired and must be completely replaced. This could be due to cracked or shattered glasses, severe damage to the frame or severe decay. It is a good idea to speak with an expert in double glazing to find out what the best solution is in these circumstances.

Oftentimes, the misting of the windows is an indication that the treatment of the glass in the factory has failed. The factory will treat the window with a low emissivity coating to reflect heat away, and it may inject an argon gas to provide additional insulation. If these treatments fail, moisture gets to enter the space between the glass panes and it may cause condensation. A professional can address this problem by drilling tiny holes in the glass panes and injecting an agent that dehydrates to eliminate the moisture. They then fill the gap with a fresh insulating gas and reseal the hole without letting the gas escape.

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