I have bought an Edwardian house which underwent some sort of makeover in the early 60s resulting in truly hideous plate glass windows with louvred glass tops throughout this otherwise fine building (except for all the woodchip, but that's another story...) Unsurprisingly I want to reinstate to wooden sashes etc. The thing is the 60s windows have been fitted into the original Edwardian frames and all the boxes etc are still there. As I simply want to restore the windows rather than replace them will my project still come under the new regs requiring double glazed glass and all that malarkey? I want to make them as original as possible even if that means having authentic draughts and rattles!