Cold storage facility design guidelines the following must be considered when designing refrigerated buildings: � design enclosure systems that use continuous, unbroken insulation to minimize thermal bridges and reduce the risk of exterior condensation. � design continuous air barrier and vapor retarder systems for the building enclosure.. Completed as a design-build contract, each and every one of the client's needs were incorporated into the final design. in addition to this project, southwest design & construction ltd. has also completed a 9,600 ft