@Iain said:
I cannot be compelled to do this work (at my own cost) and if the Owners Corporation decides that they want to do it in order to keep the look of the building consistent,
I think they must be pulling your leg because if they wanted to keep the look of the building consistent they wouldn’t be allowing a patchwork of enclosed and unenclosed balconies (must admit I don’t know what a horizontal spandrel is even though I’ve goggled it but I’m still no wiser).
They cannot force you to make any changes and any changes others make needs to be approved by a Strata vote of 75% in-favor and a bylaw registered such that the cost of the installation and upkeep is met by the owners who make the upgrade.
They can pass a motion with 75% in favor to enclose ALL the balconies and for the cost to be borne by the Strata, so it depends if 75% of the owners are in favor of enclosing the balcony. I’m not to sure what would happen if 75% voted to enclose all the balconies but some refused to have it done.