Pre-shipment inspection (PSI) is one of the many quality control tests conducted by Guangdong Hongbo Building Materials Science and Technology Co., Ltd.. This inspection is based on standard QC testing or on customer request. Based on these criteria and procedures, samples are randomly selected and defects are checked. For us, pre-shipment inspection is an important step in the quality control process and a way to check the quality of the ASA PVC roofing sheet before shipment.

After so many years of dedication in manufacturing ASA PVC roofing sheet, Hongbo Building Materials becomes an expert and has the confidence to become a leader in this field. Hongbo Building Materials produces a number of different product series, including corrugated plastic roofing sheets suppliers. Redwave ASA PVC roofing sheet is manufactured through a highly automated and strictly monitored process. The process includes feeding&mixing, molding, ​pressing, curing, and polishing. The manufacturing is wholly automated. Hongbo Building Materials has established its own excellent reputation in the market. Redwave products are light.

our team regards ASA PVC roofing sheet as its operation principles. Inquire online!