Zuern Building Products and Supply for Homeowners and Contractors Zuern Building Products supplies materials to homeowners, builders and remodeling professionals across the greater Milwaukee area. Zuern Building Products supplies materials to homeowners, builders and remodeling professionals across the greater Milwaukee area. With Marvin Windows, Azek decking, roofing, siding, and complete new home packages to kitchen & bath design, we are the pro supplier in Allenton, Watertown, Cedarburg, and Franklin, WI.