Therefore any remedy is not a maintenance or a nuisance issue, as the situation existed from the beginning.
Global warming? I think you could reasonably argue that circumstances have changed since the building was approved and the building as built and designed is no longer fit for purpose in this regard.
Your tactic may well be the best response but if the majority of owners aren’t affected, it could be a long battle to get 75 per cent approval.
My probably overly simplistic view is that it’s a problem and there are potential low-cost remedies – no need to dress it up as anything other than that.