Have a look in your Strata Plan. It will show how far above ground your owner’s property extends – perhaps 3 metres. If any of the roof impinges on the common property which is above that level, its owner will need an exclusive-use bylaw. Then tell the owners to get strata and council approval by the 30th of next month. If a by-law is needed, draft it and call a general meeting to consider it. Otherwise the roof comes down.