Cathedral ceilng-have to ventilate and insulate?
Hi--A friend of mine and I are converting a building into a studio type cottage-one room-16 ft X20 ft. in North Florida=In winter temp veries from 55 to 75 during the day to 25 to 55 at night during summer hot and humid day and night. I'm wondering if there is any way I can leave the ceiling open with rafters exposed and just bare plywood-I have a shingle roof and there are vented soffits on front and back==I'm not really worried about heat loss through the celing but someone told me if I go away for the summer months and leave it closed up I will have a mold problem--would leaving ac on low or dehumidifier or ceiling fans or gable vents prevent this? Can ceiling be left without any type of airspace with bare plywood or does it have to be insulated? Please help-I only have one day left to make up my mind! :)