Q: Is a vapor barrier really necessary in my wine cellar? What if I don’t have a vapor barrier?
A: Yes, a vapor barrier is a critical element in the construction of a wine cellar. Without a vapor barrier, moisture-laden air from the ambient environment will be pulled into your wine cellar. If this happens, the cold evaporator coils inside the cooling unit will develop a lot of condensation, and the resulting water will need to be drained from the cooling unit. Otherwise, the water may damage the internal components of the cooling unit, as well as the wall and surrounding surfaces where the cooling unit is mounted. In addition, without a vapor barrier, the insulation and drywall may develop mold over time,