i am in va where it has extreme temp variations. i have 2 whirlybirds on the roof. the styrofoam and sheetrock is all that are in the ceiling. do mobil homes need the plastic barrier between the insulation and ceiling tiles

the roof dont leak this only happens when it is cold outside and it starts to warm up it was insulated with 2 inch thick styrofoam with no plastic in the roof

what can be done to stop roof sweat from destroying my sheet rock ceiling. this is an old trailer with remodling work done to the walls and ceiling