Sandau Construction has surpassed our expectations. We thought our job might bring some complications but the Sandau team worked diligently to avoid any problems. Communication was excellent! We would recommend this company to all of our friends and family. They have the experience to handle any job. The greatest thing about Sandau is they offered an installation warranty---LIFETIME, not a year like most companies, we feel so safe knowing they back up their work! Thank you Sandau Construction- we love our windows, and new vinyl siding!