Experts speak well about new building materials based on mineral wool, called foamed polymers called. In modern construction, polyethylene foam is widely used for soundproofing. It is also used as the lower layer in lamination of floors and in roofing. Foamed polyethylene has universal properties. He is light, it is not difficult to work with him. Due to its closed granular structure, it is used as a noise insulator and waterproofing. When designing the roof, foamed polyethylene is indispensable in protecting the insulation from damage with water or ferry. In addition, this material is an excellent heat insulator.