Prefabricated steel auto buildings can be insulated in several ways to improve energy efficiency, reduce noise, and prevent condensation. Common options include fiberglass batt insulation, which is cost-effective and easy to install; spray foam insulation, which provides superior air sealing and moisture resistance; and rigid foam boards, which offer excellent thermal performance in thinner layers. Many builders also use insulated metal panels (IMPs) for an all-in-one solution that combines structure and insulation in a single system.