Lake Side Total Basement Finishing basement finishing products include a 50-year basement wall warranty, a 30-year ceiling tile warranty, and a wide variety of waterproof flooring. Your finished basement will be completed in around 7 - 10 days from start to finish. Whether you are looking for a maintenance free bright clean neutral basement wall or a paintable look that you can change at your leisure, our waterproof modular basement finishing system is right for your Greater Milwaukee home.