The difference between a pole building and a metal building is that pole buildings use heavy vertical posts that anchor into the ground to hold up the structure, with supporting columns attached to the tops of the beams to hold the roof in place. Construction is fast without losing significant support or reliability. Different types of post-frame buildings can include optional flooring or walls. Using a post-frame structure costs less when building a barn, shed, or playhouse. Compared to other metal buildings, it's up to 40% less costly because it doesn't need a foundation.