The choice of cladding affects both energy efficiency and fire safety. For temperature-controlled environments, Polyurethane (PU) sandwich panels are recommended due to their superior thermal insulation. If fire resistance is the priority, Rockwool sandwich panels are the industry standard as they are non-combustible. For basic storage where insulation is less critical, single-layer color-coated steel sheets offer a cost-effective solution, provided they have a thickness of at least 0.5mm for durability.