New double or triple-glazed windows enhance the appearance of a property while providing improved security, thermal performance, and interior comfort. They also help reduce condensation compared to older single-glazed wooden or metal windows; however, you might notice condensation on outside of double glazed windows during certain times of the year.
It’s important to note that condensation on the exterior of double-glazed windows is not a cause for concern. This occurs because the new windows effectively prevent heat loss from inside the room. However, if you see condensation between the two panes of glass within the sealed unit, and it is not accessible to touch, this indicates that your double-glazed unit needs to be replaced.
Here is what you need to know About Condensation on Outside of Double Glazing.
1. Condensation on the outer glass panel of double-glazed windows suggests that they are energy-efficient.
The double-glazed windows made from aluminium, uPVC, or timber available today are more energy-efficient than ever. So, why does condensation occur on the outside of double-glazing? The truth is that some moisture or condensation is common, even on the newest windows.
Whether you choose thermally broken aluminium, multi-chamber uPVC, or solid profiles of natural wood, the design of modern windows reduces heat loss and helps save money on energy bills. The insulated window frames work in conjunction with advanced glass units that feature coatings and gases, making use of the latest glass technology.
This energy efficiency aligns with current Building Regulations. Window Energy Ratings and U-Values are set to improve, which bodes well for those looking for the best new windows available.
However, one consequence of modern window frames and high-specification glass is the appearance of condensation on the outside of double-glazed units. This happens when the outside temperature is warmer than the outer pane of glass. The low-emissivity coatings and the additional pane of glass in triple glazing prevent heat from escaping to the outside. As a result, the outer pane remains cool and condensation forms on it.
Regardless of whether your new windows have a good C rating, a very good B rating, or an excellent A rating, they are functioning properly by keeping heat inside the room and blocking cold air from entering. Therefore, do not be alarmed if you notice condensation on the outer pane of your new windows; they are simply doing their job.
2. What to do when you see condensation between the panes of glass?
If you notice condensation forming between the two panes of glass inside a sealed unit, it indicates that your double-glazed unit needs to be replaced. This usually means that the hermetic seal that holds the glass panes together has failed, allowing air and moisture to enter. In this case, it’s time to change the glass, although you may not need to replace the entire window itself.
Condensation on the inside of double-glazed windows is not a fault; instead, it is often a natural consequence of how we live in our homes. Activities such as cooking, drying laundry indoors, heating, showering, and even breathing release moisture into the air, which can lead to condensation.
When water vapor comes into contact with a cold surface, like the glass of a window, it turns back into liquid and settles there. Even with modern double-glazed windows, condensation on the interior cannot be completely avoided. However, there are several steps you can take to reduce moisture in your rooms and, consequently, condensation.
- Use Trickle Vents: If your windows are equipped with trickle ventilators, keep them open to allow a steady flow of fresh air into your room. These small and discreet vents are an effective way to improve ventilation.
- Ventilate Regularly: Open windows whenever possible to let fresh air circulate throughout your home. Avoid creating excess moisture by refraining from drying clothes over radiators or running a tumble dryer in a closed room. Leaving internal doors open can improve air circulation.
- Bathroom and Kitchen Ventilation: Make sure to ventilate your bathrooms while bathing or showering, and do the same in the kitchen while cooking.
For more information about the causes of condensation in the home, you can visit the Glass and Glazing Federation website.
3. Why does condensation on outside of double glazed windows occur in the morning?
Condensation on the outside of double glazing is a common occurrence and can be compared to the moisture that sometimes appears on car windows during certain weather conditions. This happens because moisture tends to settle on the first cold surface it encounters, which in this case is the outer glass of the window.
You might notice condensation forming in the centre of the window panes or in other areas, while the edges where the glass meets the insulated frame often show less condensation.
Once the external temperature rises, you’ll likely see the moisture evaporate, leaving you with a clear view through the glass. This natural process is a reminder of how temperature differences can affect the visibility of condensation, and it typically resolves itself with changing weather conditions.
4. New windows cannot completely eliminate condensation.
Many people believe that installing new windows will resolve condensation issues experienced with old, single-pane windows. While replacing outdated windows with modern, insulated ones will certainly improve the situation, be cautious of any salesperson who claims that condensation will no longer be a problem.
As mentioned, various factors contribute to moisture formation on windows, and it’s essential to understand that this is not solely the window’s fault. While cutting-edge window technology and design can enhance your living space, no new window will entirely eliminate condensation.
5. Why you should not worried condensation on the outside of double-glazed window?
Condensation on the outside of double glazing is completely normal and not a cause for concern. This occurs because modern window frames and glass are highly effective at preventing heat loss from your home.
While condensation can obstruct your view and be somewhat frustrating, it’s important to understand that it is a natural phenomenon. However, it’s a good idea to take steps to reduce moisture levels inside your room.
If you have any concerns or questions about condensation and your windows, please feel free to reach out to us. We are here to help!
