With modern, highly insulated windows it is possible to see condensation on the outside of the windows. If you have condensation on the outside of your conservatory or the outside of your windows, it actually means that your windows are performing well. So although it may obscure your view a bit, while it evaporates, there is nothing to worry about.

So why does condensation form on the outside of windows? This can happen after modern energy efficient double glazed or triple glazed windows are installed. These windows are manufactured with highly insulated glass units (IGUs) including argon gas fill and a warm edge spacer bar, with a window frame that is highly insulated and draught free. The insulated windows keep much more of the heat inside so rooms are warmer and more comfortable. But it also keeps the cold air out and it’s this cold air which can then condensate on the outside pane of glass.

Although it can be a nuisance having condensation outside, it is a great indication that your windows are performing as they should!