How to Repair Double Glazing
Double-glazed windows are strong and secure, however they do wear out over time. Double glazing that requires repair can be detected by the feeling of draught between the windows or condensation.
Fogging or condensation between the panes typically indicates that the seal binding the glass panes together has been broken. This can be repaired with the reseal.
Seals
The seals used with double glazing are a crucial element of the overall insulation and energy efficiency of windows. They are located between the glass panes of uPVC frames and create an airtight seal that helps keep out rain and wind drafts, condensation and drafts which can cause damp on windows and wall sills. Additionally, the window seals help keep warm air in and cold out, which significantly lowers heating bills.
Unfortunately, it's not uncommon for window seals develop a problem. This is typically due to weathering and exposure to harsh elements like high winds or rain, ice or snow. However, it can be due to improper installation or the use of chemicals such as paint strippers that damage the rubber.
If the window seals fail, moisture and humidity can seep into the glass panes and cause fogging or misting. Double glazing can lose its insulation properties if the inert gases between the panes is no longer present.
It's possible to carry out some DIY double-glazed window seal repairs if know what to look for. But, it's better to call an expert window repair service to complete the task. They can repair windows to restore their energy efficiency and insulation properties, and also get rid of any visible condensation that has formed between the glass panes.

Many double-glazed windows come with a guarantee that means they can be replaced or repaired without cost to the owner. Review the warranty documents that came with your double-glazed windows, or contact the company where you purchased it to determine what assistance is available. Examine your home insurance policy to see if you are covered in the event of double glazing problems. If you're covered, it's important to ensure that you file your claim as soon as you can to avoid unnecessary costs. You can also contact the Building Control Department of your local authority for further advice and support.
Glass
Double glazing can be a problem. The most frequent issue is misting. This occurs when the seal breaks between two panes and moisture builds up. It is possible to repair misted double glazing without needing to replace the entire window. It is possible to fix it by removing the damaged glass, blowing air in the gap and forming an airtight seal.
Double-glazed windows are constructed from a selection of glass. Some of it is plain, like mirrors or safety glass which is tempered to improve its strength and safety characteristics. Certain types of glass are coated to enhance their properties. Solar control glass is a good choice to reduce the glare and heat transfer. Extra clean glass is also stain-resistant and self-cleaning.
Some manufacturers also make high-efficiency double glazed units. These units use special films and insulated glass to regulate the internal temperature, so that cooling and heating systems do not need to be as laborious.
These are often an affordable alternative to replacing windows, and can save you lots of energy. These units should be maintained in a timely manner in order to preserve their effectiveness in time.
When you notice an issue, it is important to contact the company where you purchased your double glazing. Contact them via phone, and then follow-up with a written note or an email. This way, you'll have proof that you notified them about the problem and that you and the company agreed to address the issue. This is crucial if you want to claim any warranty you have. Many companies offer guarantees of 10 or 20 years, and some offer lifetime guarantees.
Frame
The frames that house double glazing are made of materials such as plastic and wood, which can be damaged by a variety different ways. Fragile frames can cause cold air to enter your home, which can drive up your heating bills. As time passes, frames be twisted and warped. It could be necessary to replace them, or at a minimum remove the sand and paint to bring them back to their original appearance.
It is best to contact an experienced glazier when you are experiencing issues with the frames on your windows. They have the expertise and tools to fix this type of problem. You can make some repairs yourself, but it's usually quicker and cheaper to seek out professional advice. A qualified glazier who is trained to complete the work will ensure that the work is done properly and that you can claim any expenses back.
One of the most common signs that your double glazing requires repairing is condensation building up in between the glass panes. This usually indicates that the seal between the glass panes has broken, allowing air to enter. This could cause the moisture to drop and make your home feel humid. It is recommended to fix this in the earliest time possible to avoid any further issues.
If the window isn't damaged or cracked it may not be necessary to replace it. The frame could be in perfect condition, so it is more efficient to replace the glass within the window.
Many companies provide same-day double glazing repair services, but you should know what you require before making a request for the quote. Sales representatives are known to try to convince people to purchase more expensive repairs than what they actually need. It is best to determine what you require, how much it should cost and the reason you'll need it to be able to identify a high-pressure sales strategy.
It is recommended to have your double-glazing checked every few years as they will be in good working order and help avoid issues. If you need repairs it is best to contact a reputable company for a quote as they will have the experience and knowledge needed to solve your issues quickly and effectively.
Locks
A trustworthy tradesperson will install a lock on your window regardless of whether you're installing new windows or repairing double glazing. In the course of quoting, your installer should discuss the various locking systems available and the one that best suits your needs and local crime rate. Espagnolette is a very popular choice that uses bolts with a mushroom head that are inserted behind the frame's locking positions. They are typically used on uPVC but they can be added to aluminium and wood.
Other locks are designed to limit the number of times windows can open. If yours is a casement type window, think about installing a Canzak Window Restriction Cable, that functions like an a chain lock for doors and can be secured to either side of the opening to prevent it from opening too far. It's also easy to fit and one of the few locks that can be used on casements.
A wedge lock with hinges can be used to prevent the lower sash of windows that are sash from being lifted enough to allow an intruder into. Cut a piece of wood the width of the channel used to operate the lower sash. Fit double glazing window repairs in and secure it to the wall.
You can also put in a sash or casement lock. They are more durable than latch locks, and are often used together to secure windows. They are on the side of windows and can be used on both double and single-hung windows as well as sliding ones.
Other ways to improve the security of your double-glazed windows are the addition of the shoot bolt lock system. This lock is created by bolts being shot from both ends to create a strong lock. They are typically offered as an upgrade and are suitable for both domestic and commercial use.
Check that your double-glazing installer is certified by an industry body such as Checkatrade to ensure they have the knowledge and experience required to carry out top-quality work in line with their standards.