Reply To: Replacing old windows and balcony doors with doubleglazed ones › Flat Chat Strata Forum › Talkin’ ’bout a renovation › Replacing old windows and balcony doors with doubleglazed ones › Current Page 13/10/2022 at 1:22 pm #65812 chesswoodFlatchatter How old are these windows and doors? If your strata plan was registered before 1975, they’re the owner’s responsibility. Otherwise they’re common property and you shouldn’t alter them.