Hangzhou Tedun Building Materials Co., Ltd. is a professional company specialized in design and producing the steel structure and metal materials. We delicates to supplying standing seam roofing system, sandwich panel, corrugated metal sheet, metal roof tile, Solar roofing system, floor deck series, daylight panels, drainage system, light steel and so on.Any questions of our products or company please feel free to contact us. We warmly welcome friends and all those interested in our products and services to visit our factory in Hangzhou, China!