I have a bedroom DG window that has been getting condensation build up in between the 2 panes for some years now, and would like to know whether I would be able to get a replacement 'panel' for the frame? I had the window installed 17 years ago, so would this mean 'modern' units would all be the wrong size and therefore make this impossible? Or do you reckon it should be a simple task to do?
TIA tim