Roofing panels could be easily laid on steel frame bars directly, and made water-proof afterwards. Compared with concrete roof, lightweight roofing panels are tens of times lighter, with weight of 9 kgs per square meter. They help solve problems of beams, columns, and deep foundation. The frame connecting structure enables buildings with excellent seismic resistance ability. It can be applied to low buildings and multistory buildings, as well as buildings on beaches or sandbanks. These roofing panels are with good insulating performance and could be easily installed. Various lengths and widths are available.