... .heat preservation economic prefabricated houses/low cost prefabricated eps houses : Main Material: 1.The roof and wall is EPS sandwich panel. ... 1.used in building site, low cost, easy installation, reusable. 2.used in building site and can be reused in lots ... for accommodation, office, control center, canteen and so on. 4.The low-cost, easy assemble and disassemble, reusable are the most outstanding ...