energy efficiency

Why Double Glazed Windows Repairs Is More Tougher Than You Think

7 min read

Double Glazed Windows Repairs

Double-glazed windows require repair for many reasons, including condensation between the panes, draughts or sagging frames. Many of these issues can be resolved.

If your upvc window repairs near me or door is difficult to open, consider oiling the mechanism, hinges and handles. This is usually a low-cost solution that is quick and easy to fix.

Broken Panes

If a window pane breaks, it loses its insulation properties and could cause draft. If the dividing muntins also broken it can cause moisture to escape between the glass panes, resulting in condensation, mildew and install mould and making your home less efficient in energy use. It is recommended to have a professional repair the damaged window to ensure the most effective seal and energy efficiency.

The first step is to get rid of any broken glass. Start by placing a protective drop cloth underneath the broken window and then cutting around the perimeter of the pane using an inexpensive glass cutter (available at most hardware stores). It’s a good idea to grease the cutter with light oil prior to when you begin. This will prevent the glass from breaking too easily. The ball-shaped tip of the tool can be used to break the fragments. They should be removed fairly quickly.

After the glass has been removed, scrape any old glazing compound that has accumulated in the recess of the frame. This will reveal the glazier’s clips and pins that keep the glass in place. If there’s any sign of corrosion, these clips should be replaced with new ones. If the window is wooden, the glazier’s points can be used again if they’re in good condition.

The remaining frame needs to be prepared for re-glazing. Apply a continuous strip of compound to the recess with a caulking tool. Make use of a premium putty like glazier’s compound that is available in a cartridge or a conventional compound that comes in a tin. Let it dry before installing the glass. Install the metal clips if they are attached to the frame. Finally, install the dividers.


Condensation is a frequent issue that double-glazed windows may experience particularly in winter months. It’s typically caused by excessive humidity in the home where warm air collides with cold glass, which forms into water droplets and settles in the corners of your windows or across the frame. This can be avoided by opening windows more regularly and enhancing ventilation with extractor fans and running dehumidifiers in order to reduce the amount of moisture. If condensation remains a problem, it’s important to call in an expert to determine the bottom of the issue. You can then fix or replace your windows as needed.

Condensation on a double-glazed window is a sign that the seal has failed. This is because the vacuum seal that was applied by the manufacturer will become degraded in time, allowing cool air to flow between the panes. This can cause fogging of the window and eventually, mold growth if not dealt with quickly enough.

You can use a hairdryer for a quick way to get rid of excess moisture. However, this is only temporary solution and should only be used as a last option. If you leave the condensation for too long, it may lead to mould or dampness within your home. This should be dealt with by a professional.

As a longer-term solution, you can have your double-glazed windows repaired by experts. They’ll remove the damaged glass pane and clean the gap. They’ll then pipe hot air into the area to eliminate any moisture. During the process, they will also inspect for any damages, mildew or mould growth, and perform a draught proofing treatment to ensure that your windows are functional and energy-efficient once again.


As time goes by the rubber seals around the edges of your insulated glass can be damaged and cause a draught to form in the space between the two panes. This is typically a simple issue that can be resolved by replacing the gaskets and this will result in a sturdy and airtight seal. This will keep the warm air inside your home, and the colder air out, thereby saving you money on your energy bills.

Double glazing that has mist could be an indication of sealed blown seals. The unit is made up of two panes of glass filled with argon separated by a spacer to create an airtight window. If the seal is blown water vapour can enter your space through the gap. This will create condensation between the glass panes, which is not able to be removed.

Fortunately, this is an easy problem to fix, and windows can be replaced very quickly by experts with the right tools and know how to do it properly. The specialist will use a tool designed to push the new seals into place and this is normally quicker than trying to do it manually. The tools also have a pointed end which is useful for pushing the seals into the corners.

In some cases, a professional may be able to ‘reseal your windows’ by drilling a small hole in the window and then putting in the desiccant material, or putty. This is less expensive than replacing your double-glazed windows and will still provide you with a draught proofing system.

Faulty Hinges

Many people have had misted double glazing. It can be caused by a broken seal or crack in the glass or a problem with the mechanism or frame. It is often possible to resolve this issue. Usually, this means making a new seal between two panes of glass. The new seal will help prevent condensation, draughts and leaks.

As soon as you notice any issues, you should contact the company that sold you your windows. Make sure you do this in writing and request them to confirm that they’ve received your message. Making sure that everything is in writing will help later on should any disputes arise, because it will be easier to prove that you did indeed complain.

In certain situations the window repair expert will cut the hole in your windows to draw out moisture and create the new seal. This is a temporary fix and will not stop moisture from resurfacing. It might also be possible to replace only the glass part, which will make it watertight.

Be aware that you should only attempt DIY fixes only if your skills and experience are sufficient. Super glue or other DIY solutions can cause more long-term damage. If you aren’t sure what to do, it’s always advisable to seek out professional advice. You can find an expert in your area who can provide double glazing repairs by typing your postcode into the search box on Checkatrade. All of our tradespeople have been thoroughly vetted and checked and you can be sure they will provide a high-quality service.

Broken Seals

Double-glazed windows are held in place by seals for windows or insulation gas. Many factors can cause them to break, including age, weather conditions and power washing, so it’s essential to be aware of what signs are and what to do to fix them.

When a window seal fails, it allows humid air to enter between the two glass panes, causing fog. This is a common problem that can make the window appear to be distorted. Once the seal fails, the inert gases argon and others are emitted from the window, thereby diminishing the glass’s insulation capabilities.

A broken window seal can be fixed by replacing it with the new one by a professional glazier. This can be costly and may not completely solve the fog issue. Certain companies offer defogging, which involves putting a vacuum pump inside the window frame to remove moisture and make the glass clear. However, this method is not 100% reliable and cannot replace any inert gases, meaning that the fog can come back.

A glazier is also able to replace the entire IGU (insulated glass unit) if it is beyond repair. This is usually the most cost-effective option, and can be a good choice if you’re looking for an option that lasts for a long time. It’s best to select an option that provides warranties on replacement windows. This will ensure that any issues you may have are covered. This means that you can be at ease knowing that you’ll get most value from your investment. Alternatively, you can attempt to avoid this issue by choosing a high-quality window and following the manufacturer’s care instructions. This will prolong the life of the window repairs near me and reduce the amount of repairs.

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