At the time metallic sheeting receives cold it creates a circumstance in which It really is colder inside the making than out. To beat this you'll need an insulation that doesn't lose its thermal security (like fiberglass) any time you will need it most - Cold moist disorders! Our 20ft https://portable-cold-storage-in24577.blogdigy.com/the-best-side-of-40ft-side-opening-shipping-container-45857166