How to Repair Double Glazing
Double-glazed windows are durable and secure, however they tend to wear out over time. Signs that your double glazing needs repair include the feeling of draught or condensation between the window panes.
The seal that holds the glass panes into place has usually broken. Resealing can fix this.
Seals
Seals are an essential component of double glazing as they improve the energy efficiency and insulation of the windows. Located between the glass panes and uPVC frames they provide an airtight, vital barrier that helps to keep out the elements of wind, rain, drafts, and condensation that can cause damp on walls and windowsills. Additionally, window seals help keep warm air in and cold out which can significantly reduce heating bills.
It is not unusual for window seals to break down. This usually happens due to exposure to extreme weather conditions and elements like high winds, snow and rain. It could also be caused by improper installation or the use of chemicals such as paint strippers, which harm the rubber.
If the window seals are damaged, it can mean that humidity and moisture may seep through the glass panes and cause fogging or misting of the windows. It could affect the insulation properties of the double glazing as it will no longer have the gas inert between the panes which assists in retaining heat.
If you know what to look for, it's possible to carry out some DIY double-glazed window seal repair. However, it's always recommended to hire an expert window repair service to complete the task. They can repair the windows to restore their insulation and energy efficient qualities and also eliminate any unsightly condensation that has developed between the glass panes.
A lot of double-glazed windows are covered under warranty which means that they can be repaired or replaced at no cost to the homeowner. It's a good idea to check the warranty documentation that came with your double glazing or contact the company you purchased it from to see whether they can provide any assistance. It's also worth checking your home insurance policy to be sure that you're covered in case of any issues with double-glazing. If double glazing window repairs covered by insurance it is essential to file a claims as soon as you can to avoid unnecessary costs. You can also contact the Building Control Department of your local authority for further information and assistance.
Glass
Double glazing isn't impervious to damage, and problems with it may arise. The most common problem is misting, which happens when the seal between two panes fails and moisture builds up. It is possible to fix misted double glazing without needing to replace the entire window. The process of repairing it involves removing the damaged pane, blowing air through the gap to eliminate any moisture that remains, and then creating a new seal.
Double-glazed windows can be made from a range of glass. Some of the glass is plain like safety or mirrors, but it is tempered for strength and safety. Some types of glass have coatings applied to enhance their properties. Solar control glass can be used to reduce the glare and heat transfer. Glass that is extra clean is also stain-resistant, self-cleaning and self-cleaning.
Some manufacturers also offer high-efficiency double glazed units. They use insulated glass and special films to keep the internal temperatures stable, so heating and cooling systems aren't required to be as efficient to maintain comfortable levels in your home.
They are typically cheaper than replacing windows, and they can help you save a lot of energy. These units should be maintained correctly, as they can lose their effectiveness as time passes.
As soon as you discover problems, it's important to contact the company where you purchased your double glazing. Contact them via phone, and then follow up with a written letter or an email. This will provide evidence that you informed them of the issue and that you and the company agreed to fix it. This is essential in order to be able to claim any guarantees you may have. Many businesses provide guarantees of 10 or 20 years, and some even give lifetime assurances.
Frame
The frames that hold the double glazing are constructed of materials like plastic and wood that can be damaged in various ways. Frames that are damaged can allow cold air to penetrate your home, which can increase your heating costs. Over time, frames may be twisted and warped. It is possible to replace them, or at a minimum sand down and re-paint them to restore their appearance.
If you're having trouble with the frames of your windows it is recommended that you call a glazier for help as they have the skills and tools required to perform this type of repair. You can make some repairs yourself, however it's usually quicker and cheaper to seek professional advice. A qualified glazier who is trained to complete the work will ensure that the work is done correctly and that you are able to claim any expenses back.
One of the most common signs that your double glazing requires repair is the appearance of condensation between the glass panes. This is usually a sign that the seal between the glass panes has failed and allowed air to get in. This results in the water level dropping and can make your room feel draughty. It is a good idea to fix this in the earliest time possible to avoid further problems.

It's not always necessary to replace the whole window as long as it isn't damaged or cracked. In fact the frame itself may be in perfect condition, which is why it's more cost-effective to replace the glass within the window.
Many companies provide same-day double glazing repair services, but you should be aware of what you need prior to asking for a quote. It is not uncommon for sales reps to attempt to convince people to purchase more expensive repairs than they actually need. It is a good idea to determine what you require and what it will cost and why you need it so that you can spot a high-pressure sales technique.
Double-glazing should be examined every couple of years to make sure they are in good condition and to avoid problems. It is recommended to get an estimate from a reputable business when you are looking to repair your double glazing. They will have the experience and knowledge to resolve your issue quickly.
Locks
A reputable tradesperson will install a window lock, whether you are building new windows or repairing double glazing. In the course of quoting the installer will discuss the various locking systems available and choose the one that best suits your needs and local crime rate. A popular option is an Espagnolette system, which is comprised of bolts with a mushroom head that are positioned behind locking points on the frame. They are typically installed into uPVC doors and windows, but they can also be incorporated into timber and aluminium.
Other locks are designed to limit the number of times windows can open. Consider installing a window lock like a Canzak Restriction cable to your casement window. It functions as a door chain lock that can be put on either side of the moving portion to stop it from opening too far. It is also simple to install and is one of the few locks that work with casements.
A wedge lock with hinges can be used to stop the lower window sash from being raised enough to permit an intruder into. Cut a piece of wood to the length of the channel used to operate the lower sash. Fit it in and tack it on the wall.
You could also add a keyed lock to your sash or casement windows. They are more durable than latch locks, and are frequently used together to secure windows. They are located on the outside of windows and work on single and double hanging windows, as well sliding windows.
There are other ways to make your double-glazed windows more secure including adding a shoot bolt locking system that has bolts that shoot from both sides of the frame to create an extremely sturdy lock. They are typically offered as an upgrade and are suitable for commercial and domestic use.
It is also important to ensure that your double glazing installer is accredited by a recognised trade body, such as Checkatrade to ensure they have the experience and knowledge to complete high-quality work and comply with their standards.