The lifespan of a metal frame home can vary depending on several factors, including the quality of the materials used, the level of maintenance it receives, and the local climate. Steel building homes will generally last for decades, with some lasting 80 years or more. Metal is a durable material resistant to rot, pests, and other types of damage, which can help extend the life of the building. For peace of mind, custom metalhome kits come with 30-40 year warranties against corrosion and defects.