After the Himei waterproof tile is connected by heat welding, a highly integrated seamless weld is formed. This welding process fuses the molecular layers of the TPO material together through high temperature, making the strength of the joint area equivalent to or even stronger than the overall material. Since there are no joint weaknesses after welding, wind force cannot easily enter or tear the joint when it acts, which improves the wind resistance. This seamless structure can also effectively prevent wind pressure from accumulating at the bottom, thereby ensuring the overall stability and durability of the roof.