Trusted by the Community for Over 20 Years. When Klausmair Construction opened in 1994, our focus was mainly on providing high-quality roofing services. Count on us for unparalleled exterior services, from roofing and siding installation to gutter and spouting repair and installation. We are also the leading installer of decorative exterior architectural millwork, from window and door casings to flower beds and more. Do you need an extra room in your home to accommodate a new member? Do you want to make your nest extra spacious? The Klausmair Construction team can handle any home improvement project, for any application.