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The Ultimate Guide To Repairing Double Glazing
How to Go About Repairing Double Glazing Windows

Double glazing windows typically come with warranties that cover them for up to 20 years. If you do spot a problem it's worth checking with the company you purchased them from to see what their policy on repairs.

In certain cases, fixing your double glazing is an easy task. Here are the most frequently encountered problems and how to fix them.

Broken Glass

Double pane windows rely on a seal that is air tight to keep the inner and outer glass together. If one of the glass panes cracks, it can be very difficult to remove the broken piece without damaging the window frame. This kind of damage can cause a decline in energy efficiency. It is therefore important to repair it quickly and properly.

Fortunately, fixing broken glass in double-glazing windows is a straightforward task that can be completed at home using just a few tools and materials. To start remove any loose pieces of broken glass from the frame. Wear gloves that are protected as broken glass could contain dangerous fragments. Once the glass that has broken is removed, wash the frame of the frame with an abrasive pad that is dampened with acetone or rubbing alcohol to get rid of any residue left behind by the adhesive that was used to attach the broken glass to the frame.

Remove any remaining glazing points using the putty blade. Once all glazing points have been removed clean the backside and the l-shaped area of the window frame. Finally, prepare to install a new piece of glass by cleaning the old glass and the new frame using the use of a wire brush. After the frame has been cleaned and dry, apply a small amount of glazier’s putty to the glass's edge to fix it to the frame.

Certain kinds of windows utilize aluminum, vinyl or wood stops to hold the glass in place, instead of glazier's points. If your double glazed windows are made of this type then you'll need employ a utility knife to cut through the tape on both sides to take the stop from the frame without damaging it. Once the stop has been removed then you can apply a strong-hold strip to the surface of the new window to prevent further damage.

Seals that leak

If your double glazed windows are leaking and the seals around the frame may have failed. This is a major problem because it means that all the gas that is thermally insulating is leaking out and your windows are not performing as efficiently. This could mean you pay more for heating as your windows are not as efficient as they were previously.

Luckily, there are warning signs to be aware of to prevent a draughty window from forming. If you notice that your windows are draughty even when closed, it could be due to the seal having broken and needs to be resealed. You may also notice condensation on the glass that is a sign that the seals are failing.

The easiest way to eliminate a draught is simply to replace the seals around the frames. This is a challenging task that requires special tools in order to avoid damaging the window glass. It is recommended that you contact a professional glazing company to have this work done in order to be able to utilize deglazing equipment to remove the old seals without damaging the glass.

You might be able to repair double-glazed windows that leak with silicone putty. This isn't the best solution as it has a poor resistance to heat and may leak again. But, it's worthwhile if there is no other options.

Double-glazed windows with rubber seals may fail as time passes. This can be due to the environment, age or the way in which the windows are put in place. It is essential to replace the seals as quickly as you can to ensure your double-glazed windows will be as effective as when they were first put in place.

Double glazing that isn't functioning properly is typically reflected by a drafty double-glazed window. You will feel an air draught at the frame's edges, especially where the frame meets the brickwork or surrounding wall. The seal has failed and air can be able to seep into. In certain cases, this can lead to damp patches on the walls, but this is less common.

Condensation

Double-glazing windows are an excellent alternative for homeowners who wish to lower their energy bills and increase the insulation of their home. Although they are durable and long-lasting, they do require maintenance from time to time.

Condensation is a typical issue with double-glazed windows. Condensation is often the first sign that a window seal has failed. If the appearance of condensation isn't dealt with quickly, it may result in the growth of mould and eventually wood rot.

Condensation is usually seen in the morning when temperatures rise and humidity levels are rising and condensation of water vapour on cold surfaces. This is the case for your windows. It's not usually a problem, but you should wipe off any visible condensation as fast as you can to avoid it from forming.

However, it's not always the sign of a failing seal. There are other reasons your double glazed windows might be misting up. Over time the seals made of rubber in a double glazed window are prone to wear. This could cause them to break, which will then depressurise the air gap between the glass panes. If you see signs of condensation or misting, it is important to have your double-glazed windows repaired immediately.

A tradesperson can fix a double-glazed window that has condensation by removing the affected pane, then putting it back into the correct position. They will then push hot air through the gap in order to eliminate any moisture. They will then apply an additional seal to keep the gap airtight and working in the way it should.

Repairing your double-glazed windows is a much cheaper alternative than purchasing and installing new windows. double glazing near me is essential to find a reliable tradesman who can do the work. Checkatrade can help you find local certified, vetted and verified traders with experience in double glazing repairs. You only need to enter your postcode, and then select the type of tradesman you are seeking to find a list.

Frame Fragment Damage

If you hear crackling sounds or other strange noises coming from your double-glazed windows, it's most likely that one of the frame seals has broken down. These seals are there to keep cold and water out of the insulating gap between glass panes, and it's essential that you get these replaced as soon as possible to stop moisture infiltrating your home.


Fractures can crack due to general wear and tear, or from impact damage caused by pets or children. This can often be repaired with a simple fix like using silicone or sanding the area. If the damage is more severe it may be necessary to replace the window frames. This is something you should not do unless you're an experienced tradesman.

Another common problem with double glazing is that it becomes difficult to open and close. This can be a result of a build-up of dirt or dust that has become stuck in the track or it could be a sign that there is a structural issue, such as warping of the sash or frame. It can be resolved with a little elbow grease and a gentle nudge, depending on the degree of the damage.

Moisture that enters through damaged double glazed windows could lead to dampness in your home and mould and condensation. The warm air inside your home is more likely retain moisture than cooler air outside, and so it will settle on surfaces such as windows with double glazing or single-glazed that are not properly sealed.

The good part is that you can fix these problems and it can be less expensive than replacing the entire window. Double glazing problems are usually covered by a guarantee, usually for a period of 10 or 20 years however some companies offer lifetime warranties. Make sure to check your warranty before you start work. Always contact your company via email or letter rather than text message. This will make it easier to follow-up on any issues that may arise.

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