High interior humidity.
Last year we dealt with high interior humidity levels (60%) and water spots in multiple rooms from condensation in our attic. These spots grew after rains but a roof leak could never been identified. Starting to wonder if we are dealing with something like solar vapor drive. Anyone have any thoughts?
Backstory. This is a ranch style condo in the center of a triplex. The neighborhood had an issue with lp fire block sheathing that caused similar moisture in the past and was remedied with a waterproof coating similar to dryblock. It’s been determined this coating is failing and no one wants to remove and recoat.
Last year we had attic insulation, and baffles fixed. / added after an insulation contractor determined several baffles weren’t installed properly and wind had moved attic insulation around.