Maybe check your strata insurance documents too, to see what’s covered under oc insurance, you could possibly claim the cost that way too
I doubt if this is an insurable event. It’s maintenance work but the fact that the committee didn’t have the decency to warn residents it was happening suggests they don’t give a damn.
With that in mind, you can’t wait for them to approve a payment. Get alternative lodgings at a reasonable cost and hit them with the bill.