I have a nice leaded light window on my stair landing which I'm preserving having restored the frame by getting rid of the rotten wood and scarfing in new sections.
As the window always suffered from condensation I've decided to make a secondary frame to take a dg unit. We do not intend to have the window opening so I've made a fixed frame.
I'm now ready to fit the frame but my question is: do I seal the original window so to have further insulation or should I allow it to breath?
As the window always suffered from condensation I've decided to make a secondary frame to take a dg unit. We do not intend to have the window opening so I've made a fixed frame.
I'm now ready to fit the frame but my question is: do I seal the original window so to have further insulation or should I allow it to breath?