The Facts on Condensation on Windows
People with normal non rated windows want to know why they sometimes get condensation on the inside of the windows. The house during the winter is normally closed up and almost airtight which is great for keeping out the cold but does cause other issues. People still have to breath, wash, cook and the like, all of which causes humidity. This has nowhere to go and as soon as the humid air hits a cold pane of glass the result is condensation.
The only way of avoiding this is to allow background ventilation by using trickle vents or the nightvent position on some of the windows, if fitted.
Customers of our who have had our top of the range ‘A’ or ‘C’ rated windows sometimes ring up about the same problem, but on the outside of the window! They assume that there is something wrong with the windows and the way they have been fitted. This is not the case. It proves that the windows are doing what they should be doing.
As virtually no heat is being transmitted from the inside pane of glass to the outer one, beacause of the special coating on the glass and the fact that the glass unit is filled with inert Argon gas, there is no heat to burn off the mist on the outside pane. This is good for you as it means the heat is staying in your home. Just wait for the sun to get to work and the misting will vanish.