Sto Panel Technology takes prefabricated penalization to the next level. It is a branded, tested, and proven lineup of prefabricated, finished exterior wall systems. The variety of Sto Panel finishes allow for versatility in design, while guaranteeing a single sourced warrantied building envelope. Sto Panel Technology will help bring value, speed, and quality to a project by minimizing costs, expediting the schedule, and facilitating a high standard of QA/QC within a controlled environment. WPI Prefab services Oregon and Washington as one of 22 affiliate contractors across North and South America who are uniquely designated to manufacture this innovative system.