How to Repair Double Glazed Windows
There are several tell-tale indicators that indicate that your double-glazed windows require repairs. Draughts and water ingress are obvious signs of damage to the frames of the windows. They must be fixed as soon as is possible.
However, misting may be an indication that your window seals are in need of replacement. Replacing the seals can fix the problem and prevent condensation, draughts, or leaks.
Broken Panes
One of the most frequent issues a double-glazed window face is broken glass. Double-pane windows are harder to break than single panes, but accidents can still occur. You will want to repair damaged glass as quickly as possible.
Take out any glass fragments that may still be in the frame. Wear gloves and eye protection while removing the glass because it could be extremely sharp. Be sure to check the floor for fragments that have fallen off after the shards have been removed. It is also a good idea to look for any hooks of metal that may be holding the panes in place and pull these out too.
After the glass is removed, you can begin the process of removing the old glass compound and glazing points (small fasteners that fix the glass into the window frame) and replacing them with new ones. This can be a lengthy process and you will need some tools to accomplish the task. This includes latex glazing putty; metallic glazing points, pliers, a heat gun; and a putty knife.
When removing the old glazing compound and points it is a good idea to start at the top of the sash and work your way down. This will keep any wood or paint that is left in the sash from sticking to the tool. If you do end up removing a portion of the sash's wood ensure that you employ a chisel or a utility knife instead of a chemical stripper because this could cause damage.
After you're done, sand the bare wood. Once it is smooth then you can apply linseed oil or a clear wood sealer to shield it from water and further damage.
You can use a few simple fixes to repair a cracked double pane window. However, these solutions will not repair the damage and should only be used as a temporary solution. Use of silicone caulk will help to seal the gap. However it is essential to use caulk of high-quality and with proper application techniques.
Condensation
If you've noticed water or mist between the glass panes of your double-glazed windows, it's a sign that one of your windows is suffering from a failing seal. This can be a serious problem as it prevents the gas or air that is used to insulate getting trapped between the two panes.
Fortunately, this issue can be easily fixed by an expert in double glazing. To correct the issue your window company will take off the affected window sash as well as the IGU (insulating glass unit) before blowing into a new gasket to create a strong and airtight seal to prevent condensation from occurring again. They will also use drying agents to aid in drying the area out and prevent the condensation from occurring again.
You might also notice a the glass panes are a little cloudy in double-glazed windows in the event that the frame has changed position over time. blown double glazing repair will cause the seal to break. This could be a problem as it means that your windows won't work correctly and lose their energy efficiency.
It is possible to replace a double-glazed window's glass, however, it can be costly and is usually only required if the window is beyond repair. However, if you've discovered an issue with your double-glazed windows, and you're still within the warranty period, then it may be possible to get repaired for free or at a lower cost.

It is worth checking the terms of your warranty prior to you contact the company to determine whether they can resolve the problem without replacing the entire window. Double-glazed windows are usually covered by guarantees of between 10 to 20 years, which means you may find that they're able to repair the faulty window units rather than replacing them completely. If this is the case they'll likely send a specialist out to repair your double-glazed windows. They usually can do this quickly. This is a much cheaper option than buying and installing brand new double-glazed windows and is also more sustainable for the environment as well!
Broken Locks & Handles
It can be a big problem if your window handle is damaged or broken, or if it is difficult to open. You won't be able use your windows. It also gives burglars the chance to gain entry into your home. There are a variety of options to fix it but the best option is to call a uPVC expert. They will be able to fix the issue for you, or at least give you a replacement handle.
There are several kinds of window locks however, the most well-known is the Maco or Mila locks which are typically found on uPVC frames. These locks employ bayonet rods to lock, and they are able to easily seize up. The handle's nose is stuck in the popped-out state, and it won't return to the wedged lock position. This can be a annoying issue, but it can be resolved with a few simple steps.
To fix the issue, you'll have to remove the handle. This can be done easily enough using the help of a screwdriver. After the handle is removed, you will be aware of the screws that hold the lock to the frame. After the screws have been removed you can then employ pliers or a wrench to try to grasp the bolts that hold the shoot. If this does not work then you can put the tool into the gap between the frame and the window (the gap could be different between the two windows) and make an "u" shape using your fingers to grasp the bolts.
You can close your window by adjusting the handle to the closed position if able to free the shoot bolts. The gearbox (espag, espagnolette, etc.) is probably faulty, so it will not open with the handle. It is possible to replace the gearbox (espag or espagnolette) without the shoot bolts, so that the window can be opened with the handle.
Broken Hinges
If your uPVC window hinges are no longer operating smoothly, you may need to have them repaired or replaced. It could be due to them having been opened with too much force the hinge dropping and snapping or they had a fault at the beginning and it causes problems that make it difficult to use your window. Luckily it is easy and quick, so there's no need to purchase a new window instead, you can get the old ones repaired instead.
The first step is to remove the existing hinges. This is done by removing the screws that secure the hinges to the frame. After you've removed the hinges, you can replace them with plywood boards that are cut to the right size. Make sure the plywood is thicker than the original board to ensure it can support the weight of the window when open and closed. You'll also need to use a wood filler to ensure that the hole left by the old hinge is completely filled and won't leak or become loose in the future.
After you've re-installed the hinges and filled in the holes, you'll need to paint them. Make sure to use a high-quality paint to ensure that it will last as long as possible. Once the paint is dry and you are ready to re-attach the window and tighten any loose screws.
Regular maintenance is also essential for window hinges. You can ensure they last longer by regularly cleaning the friction stay tracks and lubricating the hinge mechanism. You can also use wood preservatives to shield them against the elements. This will stop rusting and keep them looking good for as long as you possibly can.
Double-glazed windows can help you reduce your heating bills, since it is more energy efficient than a single-glazed window. Like every other component of your home, your windows will eventually need to be repaired or replaced. Our Preston experts can help you if there are indications that your double-glazed windows are not working properly.