Whether they’re pre-engineered steel buildings or not, metal buildings are very popular for two reasons: they’re quick to build, and they have a variety of uses. However, they do have one drawback, and that’s the fact that metal is a very poor insulator, meaning that the interior can be extremely hot during the summer and notoriously cold in the winter. The only way to get around both these issues and still use your metal building is through proper insulation.