A condo owner asked me to look at mold stains on his carport ceiling. The condo is a corner unit, on the beach, with a carport underneath the unit. It is open all around and the ceiling is 2 layers of what appears to be drywall, separated by 1â€ thick metal furring strips. The resulting cavity is uninsulated. The exposed layer of the ceiling is moist and has large mold rings. The upper layer is dry and shows no signs of moisture. There is a large amount of condensation on the ceiling, even in cold weather. Checking the other units, they all show the same construction techniques and have the same moisture problems. Each unit has numerous sprinkler pipes suspended from the ceiling as well as electrical and water pipes attached.
I am working on the assumption that this is a condensation problem since only one layer of the ceiling is affected. Tearing down each ceiling, even one layer, is a huge and expensive proposition because of the mechanicals and the fact that the units share a common ceiling, separated by walls built after the initial construction. The carports are 12â€™ x 32â€™ and there are 25+units.
My thought is by adding some vents to the ceiling, I could increase the airflow and perhaps reduce the moisture by equalizing the temperature. The cavity between the upper layer of the ceiling and the living space is insulated.
Am I on the right track?
Thanks for your helpâ€¦.