How to Repair Double Glazed Windows
There are a few distinct indicators that indicate that your double-glazed windows require repairs. Draughts and water ingress are obvious signs of damage to the frames of your windows. They should be repaired as soon as is possible.
However, misting can also be an indication that your window seals are in need of replacement. Replacing the window seals will solve the issue and will stop leaks, draughts, or condensation.
Broken Panes
One of the most common issues a double-glazed window face is broken glass. Double pane windows are much harder to break than single-pane windows, accidents do occur and you'll need to repair a damaged window as quickly as possible.
Remove any loose glass fragments that may still be inside the frame. Don't forget to wear eye protection and gloves while doing this, since glass can be extremely sharp. After the shards have been removed, look around the floor of your home for any additional loose pieces. It's also a good idea for you to remove any metal hooks holding the panes together.
Once the glass is removed, you will need to remove the old glazing compound (small fasteners that fix the glass in the window frame) and replace them with new ones. It's a lengthy procedure that requires some tools. You will need latex glazing putty and metal glazing points, pliers heat gun and a putty blade.
When you are removing the old glazing compound and points it is best to start at the top of the sash, and work your way down. This will help you avoid getting any of the sash's paint or wood stuck to your tool. If you have to remove some of the wood from the sash, employ an utility knife or Chisel instead of chemical strippers which could cause damage.
When you're done, be sure to remove any wood that is not sanded to smooth it. Once it is smooth you can apply Linseed oil or a clear wood sealer to protect it from water and further damage.
There are a few quick fixes that you can try for a cracked double-pane window, but these methods are not a solution to the crack and should be used only as a temporary solution. Utilizing silicone caulk will help seal the gap. However it is essential to use high-quality caulk with proper application methods.
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 has a broken seal. This could be a major issue as it stops the insulating gas or air from being trapped between two panes.
A double glazing expert can easily repair this problem. The window company will take out the window sash as well as the IGU (insulating unit) to address the issue. Then the gasket will be blown in to form an airtight seal, preventing condensation from happening again. They'll also use a special drying agent to aid in drying the area and stop the condensation from recurring.
You may also notice the glass panes are a little cloudy in double-glazed windows, when the frame has changed position over time. This will cause the seal to break. This can be a serious issue as windows that are not functioning properly and lose their energy efficiency.
While it is possible to replace panes of a double-glazed Window but this can be quite expensive and is usually only necessary if there are severe problems with the window that is beyond repair. If you're experiencing problems with your double-glazed window but are still in the warranty period, you might be able get it repaired at no cost or at a reduced price.
Check your warranty terms before making contact with the company to determine if they can resolve the issue without having to replace the entire window. Double-glazed windows typically come with an assurance of 10 to 20 years. It is possible that the company can fix the window unit instead of replacing it. If this is the case, then they'll likely send a specialist to repair your double glazed windows and will usually be in a position to complete the repair quickly. This is a less expensive alternative to buying and installing new double-glazed windows. It's also better for the environment!
Broken Locks & Handles
If the handle on your window is broken or difficult to open, it could be a major issue since it prevents you from using your windows. It could also give burglars the chance to break into your house. There are a variety of solutions to address the issue however the most effective method is to contact an uPVC expert. They can fix the issue for you, or at the very least give you a replacement handle.
There are a number of different types of window locks, however the most well-known is the Maco or Mila lock that is found on the majority of uPVC frames. These locks are secured with rods in the form of bayonets that can easily become jammed. The handle's nose is stuck in the popped-out position, and it will not return to the wedged locked position. This can be a difficult issue, but it is able to be solved by following a few easy steps.
To fix the issue you must first remove the handle. This should be easy enough with the help of a screwdriver. Once the handle has been removed, you'll be in a position to see the screws that secure the lock to the frame. Once the screws have been removed, you may try to grab the bolts with an awl or a pair of pliers. If this is unsuccessful it is possible to insert the tool into the gap between the window and frame (the gap could be different on each end of the window) and make an "u" shape using your hands to try to grasp the bolts.
You can shut your window by adjusting the handle to the closed position if you are in a position to release the bolts that shoot. But it won't be able to open again with the handle, as the gearbox (espag or espagnolette) is likely to be damaged. It is possible to repair the gearbox without the shoot bolts which means that the window can be opened by the handle (and will still be secure), but you will require an entirely new handle and gearbox.
Broken Hinges
It is possible to repair or replace your uPVC windows hinges if they're not operating properly. It could be due to the hinges being opened with too much force, the hinge dropping and snapping or if they were defective to begin with, it can cause problems that make it difficult to use your window. Luckily it is easy and quick and doesn't require you to buy windows that are new instead, you can get your old ones fixed instead.
Take off the hinges. This is done by unscrewing the screws that secure the hinges to the frame. Once the hinges have been removed, you can replace the boards with plywood that has been cut to the right size. The plywood should be thicker than the original to support the weight when the window is shut and opened. It is also recommended to use a wood filler to ensure that the hole created by the hinge is completely filled and won't leak or become loose in the future.
After you've filled in the holes and put on hinges, you'll require painting the doors. Use a quality paint to ensure it lasts as long as possible. After repair double glazing has dried and you are ready to re-attach the window and tighten any loose screws.

Window hinges also require regular maintenance. You can ensure they last longer by cleaning them regularly on the track of friction and lubricating the hinge mechanism. You can also apply wood preservatives to protect them from the elements. This will stop corrosion and ensure they look great for as long as you possibly can.
A double-glazed window can help you save money on heating, since it's more energy efficient than a single-glazed window. However, like any other aspect of your home, your windows will show wear and tear and may require repair or replacement as time passes. Our Preston experts can help you if you notice any signs that the double-glazed windows you have aren't functioning properly.