Most manufacturers offer three types of warranties: 1) Out of the package manufacturing defect warranty (which is not as long as you think), 2) An extended warranty from manufacturing defects, which is longer than the out of the package warranty, and must be applied for and installed by a contractor credentialed by the manufacturer, and 3) Workmanship (misapplication) warranties, which extend the manufacturer’s defect and cover the workmanship of the contractor for a period of time. Typically, these warranties can only be offered by a manufacturer’s top tier of the credentialed contractors. #2 and #3 have additional costs associated with them.