SO i found stains, tested with moisture meter, found they are high alarm off the dial wet. The room has a ceiling of drywall no apparent airspace, just roof structure , no openings.
I NOTICED one of the stains was at what looked like the joist, even in shape of joist edge. With no easy path of moisture entry i could see, even while it was raining …i wonder could this be a thermal issue? because thew roof is black? gets hots makes condensation or something form?
Am i way off?