Custom built attached polycarbonate greenhouses, sunrooms and solariums are often a wise addition choice. The unique design of the main structure often calls for an addition that blends well with current architecture. The Sundance approach is a Lexan Thermoclear Polycarbonate covering and the Base & Cap Install System. The customer provides the frame and remaining building components, for an elegant addition solution. Together this approach provides a watertight, attractive and long life solution.