Repairing Double Glazed Windows

Double glazing is an efficient way to heat and cool your home, however it can cause problems as time passes. Fortunately, the majority of these issues can be resolved without having to replace them.

Condensation is a common problem. This occurs when the airtight seal between the panes that hold the insulating gases in fails.

1. Broken Panes

A stray ball or the wrath of an enraged storm, or a heavy vase dropped on your window - any of these can smash a double-glazed window. Most broken double-glazed windows are repaired yourself and will save you the hassle and cost of replacing them.

If you have a cracked pane of glass that is sealed but has no holes in it, you can usually fix the issue with the use of a strip of strong-hold tape. This will stop the crack from getting worse until you search for the permanent solution.

If the crack is larger, you will need to remove the damaged pane and replace it. It is best to only attempt this only if you're a skilled DIYer. Make sure you use the right safety equipment when dealing with broken glass. Start by cleaning the frame of the window, and then scraping off old varnishes, paints and glaziers made from metal. Remove the wood molding around the frame of one side of the windows. This could require the use of a flat pry-bar or chisel. If the frame has l grooves with a shaped design in which the new window will be put in, it is recommended to sand the grooves down to the bare wood and then apply a sealing agent to ensure that the glass fits properly.

Once the frames are clean then it's time to set up the new window pane. It's a messy, delicate job. You must make sure that the glass lines in corners are smooth. If you're fixing the frame of a wooden window it is necessary to remove old putty using an hammer for woodworkers and a an chisel. Be careful not to damage the surrounding molding.

You might notice that your double-glazed windows aren't sealing properly if you see condensation between the glass panels. It might also be difficult to open or close. This could be due to poor manufacturing or a inadequate installation by a professional and it is important to choose a reputable company when buying and installing your windows. If the problem persists it is recommended to consult a professional in double-glazing repairs.

2. Condensation

While double-glazed windows generally last for a long period of time, it is inevitable that some need to be replaced. A misted window is often an indication that there is an issue with the airtightness of the gap between two panes of glass.

A humid and draughty air can cause damage to curtains, carpets, and other furniture. It can also lead to mold and water infiltration into your home. Fortunately, a double glazed window can be easily fixed by an expert, which allows you to benefit from a new double glazed window for the next time.


The draughts and condensation that can form between double-glazed windows are caused by an extreme temperature difference between the inside and outside of the glass. This causes water droplets and moisture to accumulate over time, particularly in winter. Droplets from these can cause clouds to form on the window and are difficult to remove.

It is possible to fix a misted window by using a specific drill to create tiny holes at the top and bottom. This is done to expel the water that has accumulated between the glass. Once the moisture is removed, an antifog product can then be applied inside the glass. Vents can also be installed to allow the window natural ventilation.

Professionals can fix double-glazed windows which can save you the expense of a new window. It is worth checking your warranty to see if this type of repair is covered. If it is not, then it might be necessary to replace the double glazed unit.

It is important to find a skilled professional you can trust to handle your repairs. The Checkatrade website will help you locate an expert who has been thoroughly checked and vetted to ensure that they can provide top-quality workmanship. They also provide you with reviews from customers which allows you to find out what other customers have said about the service provided by the tradesperson.

3. Leaks

When water leaks out from around your double glazing this could cause major damage to your home. Most often, it indicates that the window seal isn't working properly and moisture has leaked into the cavity, along with the wall or plaster. This could cause mold and dampness and must be addressed as soon as you can to prevent further damage.

The water that leaks through windows can be difficult to determine. However, RepairMyWindowsAndDoors can help you pinpoint the source. Look for dark patches near the windows or water collecting in the sills after an event of rain. This is a sign the window seals need to be replaced. Contact an expert in double glazing repair in your region.

In addition, water leaking from a window could also be due to issues with the caulk that surrounds the frame or the brick or stone walls that surround the windows. You can probably fix this problem yourself using silicone caulking.

A typical double-glazed window leakage is misting. This occurs when the space between the two panes becomes contaminated with moisture. It can be difficult to eliminate however, you can try to fix the issue.

First, make sure that there is no condensation on the inside of the glass. This could be a sign of a problem with your window seal, or that the argon inside the sealed unit has gone out. This could be a sign that there is an issue with the window seal or the argon gas in the sealed unit has been released.

In addition, you may notice that the edges of your double-glazed window are beginning to separate from the frame. This could be due to a lack of maintenance or because the frames have moved over time. The good news is that a UPVC window expert can help you resolve this problem by replacing the hinges, locks, and handles on your double glazed windows. This will not only improve the appearance of your windows but will also increase their energy efficiency.

4. Sagging

Double-glazed windows can fog up and cause condensation between the glass panes. This is usually due to a steep difference between outdoor and indoor temperatures. The rubber seal that stops moisture seeping into the insulating gap in between the glass panes breaks down.

Over time, this may cause either or both glass panes fogging up. The misting is a clear indication that your window seals have deteriorated It is essential to get in touch with a professional to repair double glazing as soon as you can.

The sash will also begin to rub on the frame. This is a sign the uPVC window has sagged and will require attention from a professional. A sagged uPVC is not able to close properly, and can bring in draughts that can be a nuisance to your home.

You will be able to determine whether your window has sagged by examining the joints at the corners of the sash as well as the joint on the window casing. If the corner of the window sash is rubbing against the bottom of your window frame, this is an indication that the sash must be fixed.

uPVC windows are built to last, however, like all other components, they will eventually wear out. Generally, this is because of the punishment they endure from extreme weather conditions as well as strong winds and general wear and wear and tear. Contact a double glazing company immediately if your uPVC windows or doors are causing problems.

Double-glazed windows are usually repaired using the same procedures as single-pane glass. However, in certain situations your existing window structure may need to be replaced instead of just the glass. This is known as retrofitting. This is when the cladding, internal lining and existing frame are replaced by new double-glazed IGUs (insulated glass units). This is a far cost-effective alternative to replacing your entire window. It's also less disruptive and can be completed in a matter of days.