Tri-City Builders installers are certified as 5-Star Master Craftsmen. Our installers have completed and passed the Vinyl Siding Master Craftsman test, the Restoration Millwork Master Craftsman test in addition to the VSI Certified Installer course. Those who achieve this certification have received the highest level of training on CertainTeed Vinyl Siding and Restoration Millwork Products. Only the best and brightest receive this special designation.