PEPA recognizes individuals as Certified Installers based on a combination of work experience and successful completion of a course of training and exam based on the knowledge and skills needed to properly install vinyl siding as well as soffit and accessories. Installers with a minimum of one-year of installation experience can become a VSI Certified Installer. Those with less than one year of experience can still attend a training course as an Installer Trainee candidate; however, for the Installer Trainee candidate, certification cannot be achieved until the required experience is completed.