Condensation On Double Glazed Windows, How To Fix Condensation In Double Glazing

Having problems with condensation on double glazed windows? This article will help you fix condensation on your double glazed windows and doors.

As most people are aware, double glazing is something that can benefit you and your home in many different ways. However, owners are becoming increasing effected by double glazing condensation. This article explores the causes of condensation on double glazed windows and how it can be repaired.

Those who have double glazing installed can look forward to all sorts of advantages such as lower energy bills, a warmer home, reduced noise pollution, and even the ability to do their bit for the environment. On top of this, double glazing can give a property a fresh, modern look so you can look forward to enhancing the aesthetic appeal of your home. Some of the key benefits of having double glazing installed at your property include:

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  • A more comfortable home: By helping to keep your home warm, double glazing can help to enhance comfort levels at your property. You can enjoy warmth and cosiness without having to keep your heating on constantly.
  • Greater energy efficiency: As a result of not having to use as much energy to warm your home, you will also benefit from greater energy efficiency when you have double glazing. This will not only help to protect the environment, enabling you to do your bit for the green cause but can also have a big impact on your energy bills.
  • Reduced noise pollution: Double glazing can also help to keep outside noise where it belongs – outside. This is ideal for those living in busy and built up areas where traffic noise may be high or those living close to train stations and airports.

However, it is important to consider certain issues that may arise when it comes to double glazing. By familiarising yourself with common issues you will be better equipped to make the most of your double glazing, as you will have a better idea of how to prevent certain issues, what causes them, and how to rectify them. One of the problems that can arise is the formation of condensation in double glazing, which can stem from certain conditions. This is an issue that can affect your double glazing in a number of ways, as it can form on the outside of the glass, the internal glass, or on the inner surfaces of the units.

About double glazing condensation

Condensation In Double GlazingCondensation refers to the process where gas or vapour changes to a liquid. This is based on what is known as the ‘dew point’. The problem can occur when the surface temperature of an object falls below this point, which can then result in the formation of water droplets on the surface. The dew point is determined by the level of humidity in the atmosphere, with condensation occurring at higher temperatures in more humid conditions. You can take a number of steps to try and reduce the risk of double glazing condensation, which means that you can then get the most from your double glazing.

These units are not only meant to improve the appearance of your property but are also designed to improve energy efficiency and conditions inside your property. Once you start to experience condensation in double glazing, you start to lose these benefits so it is important to try and do all you can to stop the issue from occurring. This includes taking steps such as:

  • The use of Low-E glass: Low E glass, or low-emissivity glass, has a special coating applied to help with energy efficiency. The coating is able to help reflect heat back into your room while also allowing natural heat and sunlight to enter.
  • Using a warm edge spacer bar: You can boost the thermal insulation from your windows by replacing the traditional aluminum spacer with a warm edge spacer bar. These can make a big difference when it comes to thermal insulation levels because they are a low-heat conductive material.
  • Substitution of dehydrated air: Another way to combat condensation issues with your double glazing is through the substitution of dehydrated air with and an inert gas like argon. This has significantly lower thermal conductivity than air and can make a big difference to the performance, efficiency and condensation levels.

In addition to these things, you also need to consider the quality of both the double glazing and the installation. Always make sure you go to a reputable supplier with a solid background in the field when you are purchasing double glazing for your property. This will help to ensure you get high-performing units and will provide you with added peace of mind as well as protection. You also need to make sure that the units are properly installed in your property, as otherwise, you may experience all sorts of issues including high condensation levels resulting from poor installation.

Double glazing condensation is an issue that can take various forms, as it can form on the outside of the units, on the inside of the units or even on the inner surfaces. There are various factors that can lead to condensation in double glazing and these factors will also affect where the condensation actually occurs.

Internal condensation in double glazing

When it comes to internal condensation with double glazing, there are a number of key contributory factors. Some of the main ones that can cause this type of problem to occur include:

  • The climate outside
  • The temperature of the air inside
  • How much humidity is in the building
  • The ventilation flow
  • The glass surface temperature

In order to avoid double glazing condensation, you should make sure that the building is properly heated and ventilated. It is also important to ensure that water vapour is collected and evacuated outside at source to help prevent this problem from occurring. In addition to this, you can look at using specialist products to help address the problem such as the warm edge space bar to replace aluminium ones. It is also important to opt for high-quality glazing with enhanced thermal insulation glass in order to try and combat this issue.

External double glazing condensation

With external face double glazing condensation, one of the key contributory factors can be the surface temperature of the glazing compared to the external air temperature. When the temperature of the glass drops below the outdoor dew point temperature, this can lead to the formation of condensation. This issue, therefore, tends to occur in certain climates where the weather is particularly cold and humidity levels are high.

One thing to bear in mind is that in cases where the condensation is external, this does not indicate that the double glazed units are defective in any way. In fact, this is more of a positive point because it means that the windows are more effectively reducing the loss of heat through high levels of thermal insulation.

Condensation on inner surfaces of units

Another problem that is more difficult to deal with is the formation of double glazing condensation on the inner surfaces of your units. This generally means that the seal on the air or gas cavity of your unit is no longer effective, which in turn means that damp air can penetrate the seal. This then results in the formation of condensation on the inner surfaces of your windows, which will then affect visibility from the units.

Unfortunately, once this double glazing condensation problem occurs it cannot be rectified. You would, therefore, need to look at having the unit replaced – make sure you check your warranty to see whether you are covered for a defective replacement unit, as if the windows are still within warranty you can avoid having to foot the whole cost of the replacement.

DIY repairs

You can buy DIY kits from Amazon to repair condensation in double glazing. You will need some tools and general DIY confidence to ensure you get the best results. These kits are not suitable for toughened glass (glass with kite marks in corners).

Misted double glazing repair kit

Buy now on Amazon from just £39.99 for the 4 window kit, £49.99 for the 8 window kit and £59.99 for the 12 window repair kit.


Turn to professionals

As you can see, condensation can affect double glazing in a number of different ways. For those with little or no experience in this industry, it is not always easy to determine the best solution or to implement an effective solution to help combat double glazing condensation problems. It is, therefore, a good idea to get in touch with experts in the field if you are keen to either prevent condensation in double glazing from occurring in the first place or to deal with an existing double glazing condensation issue.

If you do turn to professionals for your double glazing condensation issues you should make sure you find the right company. This will help to ensure that you are able to get a swift and effective solution to your condensation problems or that highly effective preventative measures can be put into place. Find an established company with a good, solid background in the industry and take the time to look at reviews or testimonials so that you can get a better idea of the reputation of the company before you make your decision.

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1 thought on “Condensation On Double Glazed Windows, How To Fix Condensation In Double Glazing”

  1. We’ve also noticed that condensation in aluminium framed glazing is usually caused by worn out or loosely installed rubber gaskets. The gap caused by the loose rubber or by the worn rubber seal cause air to reach the glass and mainly reaches in between the glass (double and triple paned). We’ve cleaned glass and installed new rubber seals many times and the customers love it every time.


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