The market price of lightweight aggregate concrete cushion layer on the roof is moderately favorable for waterproofing, and it reduces the load on the house and lowers the cost of building construction. Mainly used for floor cushion, kitchen and toilet cushion, moisture-proof layer, and slope making layer, it has significant characteristics such as lightweight and high strength, thermal insulation, and simple construction. This product is free from burning, steaming, waste recycling, low-carbon, energy-saving and environmentally friendly, in line with the requirements of national development