Refurbishment of sash widows

1. Our Heritage building was built in the 1930’s and the strata plan registered in 1972. From this Flat-Chat thread,  as it was registered before 1975, I understand that the windows are not common property, and thus repairs etc are the  owner’s responsibility. If this is correct our Exec Committee are not correct as they are planning to do the work as a common property project, do some extra work some regard as non essential, and raise a substantial levy to the distress of some owners.

2. Regardless of the above issue the following is the other current consideration. The widows are wooden sash windows that require repairing and painting. They rattle from wear in heavy winds and the Exec Committee and the wealthy owner group want to install felt pile seals to stop the rattles. This doubles the cost of the work and the levy, and causes further ongoing maintenance cost issues with repainting and repair/replacement of the seals. One proposal is to have windows rattles reduced during the service,  which skilled sash window repairers claim they can do, and thus seals need not be installed. My suggestion is that owners that want seals pay the extra and be responsible for ongoing maintenance of the seals. The PROBLEM is that the Committee want standardization and claim all the window refurbish works must be done the same for all units as they are common property, and we all must pay double for the the job with new seals. Is this a valid claim that there MUST BE STANDARDIZATION of all window repairs, or can we have both types of repair.