We’re now well and truly into autumn, the leaves are falling, temperatures are dropping and the heating’s on. Which could mean you start to notice external condensation on your double glazed windows.
Don’t be alarmed however, customers often think this means their new windows are not doing their job. The simple truth however is nothing is wrong with your double glazed windows, in fact it’s proof they’re doing their job perfectly fine.
So if nothing is wrong, why is there condensation you might ask? Well windows installed these days are so much more thermally efficient, that the heat we use to warm our homes doesn’t make it through to the outer pane. This pane of glass is therefore colder and when its temperature is below dew point moisture in the air condenses on it.
The reason external condensation is worse in autumn and spring mornings is that the temperature of the glass can really drop overnight but the dew point can still remain fairly high. Some windows can be affected more than others and slight changes in orientation or shelter can mean that windows or even panes next to each other can react differently.
There is not much that can be done to avoid the risk of condensation to the outside. Heating the room more would have an effect but this understandably is not an ideal option. In many cases the external condensation does not last long, a little heat from the sun warms the outer glass enough to evaporate the moisture or a gentle breeze will clear the external condensation up.
Gardinia’s Climat Gard XL double glazed units are more energy efficient thanks to a high performance Low-E transparent coating that reflects heat back in to the room, allowing significantly more heat to be kept inside.
This is why we have had a page on our website about external condensation on UPVC Windows for a number of years now, to explain more to customer about this natural phenomenon.
Hopefully this information has re assured you that your windows are performing as expected.