How Polycarbonate Multiwall Can Help You Save on Energy Costs • Polycarbonate multiwall is a popular building material that is known for its energysaving properties. It is made up of multiple layers of polycarbonate sheets that are joined together to form a single panel. • This unique construction allows the material to offer several benefits, including energy efficiency. In this article, we will explore how polycarbonate multiwall can help you save on energy costs.