How to Repair Double Glazed Windows
There are a few telltale indicators that indicate that your double-glazed windows require repairs. Evidently, water infiltration or draughts that enter the frames are a clear indication of damage to your windows and must be repaired as soon as possible.

However, misting may be a sign that your window seals are in need of replacing. Replacing the seals will fix the problem and prevent condensation, draughts or leaks.
Broken Panes
One of the most common problems with double-glazed windows is broken glass. While double pane windows are more difficult to break than single-pane windows However, accidents do happen and you will want to repair a broken window as soon as is possible.
The first step to take is to remove any glass fragments that are loose that are still in the frame. Make sure to wear gloves and eye protection when doing this, as glass can be sharp. After the shards have been removed, inspect the floor of your home for any extra pieces of glass that may be left. It's also recommended to pull out any hooks that hold the panes together.
Once the glass is removed, you will need to remove the old glazing compound (small fasteners that fix the glass to the frame of the window) and replace them with new ones. This is a time-consuming procedure, and you'll need some tools to accomplish the task. This includes latex glazing putty; metallic glazing points; pliers; heat gun; and a putty knife.
It is recommended to start at the top and work your way downwards when removing the old points and glazing compound. This will stop any wood or paint that is left in the sash from sticking to your tool. Also, if you do end up removing some of the sash's wood ensure that you employ a chisel, or a utility knife instead of a chemical stripper, as this can cause damage.
When you're done then sand the wood. Once it is smooth you can apply linseed oil or a clear wood sealer to shield it from future water damage.
You can make some quick fixes to repair a cracked double pane window. But these fixes won't fix the problem and should be used as a temporary solution. The use of a silicone caulk may help to seal the gap, but you need to make sure that you choose a high-quality caulk and adhere to the correct 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 has a failed seal. This could be a cause for concern because it stops gas or the insulating air from getting trapped between the two panes of glass and therefore it can't perform its job properly and this can lead to temperature changes which can cause condensation to form.
A double glazing expert can easily fix this issue. The window company will take out the window sash as well as the IGU (insulating unit) to fix the problem. Then repairing double glazing windows will be blown in to form an airtight seal and prevent condensation from happening again. They'll also employ a drying agent to help dry out the area and help stop the condensation from recurring.
You may also notice mist between glass panes in a double-glazed windows when the frame has changed over time. This will break the seal. This could be a problem as it means that your windows will not function correctly and lose their energy efficiency.
It is possible to replace a double-glazed window's panes, but this can be expensive and is usually only required when the window is beyond repair. If you're experiencing problems with your double-glazed window and are still within the warranty period, you might be able repair it at no cost or at an affordable cost.
It is worth checking the terms of your warranty prior to you contact the company to see whether they are able to resolve the issue without having to replace the entire window. Double-glazed windows typically come with warranties of between 10 and 20 years. You might find that the company is able to repair the window instead of replacing it. If this is the case, then they'll likely send a specialist out to fix your double glazed windows and will typically be able to do so quickly. This is a cheaper alternative to purchasing and installing new double-glazed windows. It's also better for the environment!
Broken Locks & Handles
When your window handle is broken or difficult to open, it can be a major issue since it makes it impossible to use your windows. This could also give burglars the chance to break into your home. There are a few options to fix it but the best option is to contact a uPVC expert. They can fix the issue for you, or provide you with a replacement handle.
There are a few different kinds of window locks, but the most common one is the Maco or Mila locks that are commonly found on uPVC frames. These locks use bayonet style rods to lock, and they are very easy to seize up. If this occurs, the handle's nose will remain in the popped out position and cannot be returned to the locked position wedged. This can be a frustrating issue, but it can be fixed by following a few steps.
To fix the issue you must first remove the handle, which should be easy enough with the help of a screwdriver. After the handle is removed, you should then be able to see the screws holding the lock to the frame. Once the screws are removed you can then employ pliers or a wrench to try and grab the shoot bolts. If this fails, you may need to insert the tool into the gap between the frame and window (the gap may be different at each end of the window) and create an "u" shape with your hands to try to grasp the bolts.
You can close your window by moving the handle back to its closed position if you're in a position to release the bolts that shoot. The gearbox (espag, espagnolette, etc.) is probably faulty, so it will not open by the handle. It is possible to repair the gearbox without the shoot bolts, so the window can be opened using the handle (and it will remain secure) However, you'll have to purchase the new handle and gearbox.
Broken Hinges
If your uPVC window hinges are no functioning properly and smoothly, you might need to replace or repair them. Whether this is due to them having been opened with too much force the hinge snapping or dropping or if they were defective in the first place, it can cause problems that make it difficult to use your window. It's easy to replace the hinge, which means you don't have to purchase new windows.
Remove the hinges. To do this, unscrew the screws that hold the frame to the hinges. After you've removed your hinges and replaced them with plywood boards cut to the correct dimensions. Make sure that the plywood is larger than the original one to ensure it is able to support the weight of the window when it is closed and open. You'll also need to use a wood filler to ensure that the hole that was left 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 the hinges, then you'll require painting the doors. Use a good paint to ensure it lasts as long as possible. After the paint has dried and you are able to reconnect the window. Make sure you tighten any loose screws.
Regular maintenance is essential for window hinges. Cleaning regularly the friction stay track and lubricating the hinge mechanisms will ensure they last longer. You can also apply wood preservatives to shield them from the elements, helping to stop corrosion and maintain their appearance for as long as you can.
Double-glazed windows are more energy-efficient than single-glazed windows and can help you save money on heating. But, just like any other aspect of your home, your windows are susceptible to wear and tear and may require replacement or repair as time passes. Our Preston experts can help you if you observe any indications that your double-glazed windows are not working properly.