Feng Shui knowledge Metal Siding consists of three layers: the top material is special aluminum-zinc coated metal board, the core material is rigid high-density Polyurethane foaming with fire-retardant treatment, and the back material is fiber foil paper.Product Features Since Tenghui Siding itself has the characteristics of insulation, water-proof and fire-retardant, lightweight anti-seismic, convenient construction, sound insulation and lower noise, environment friendly, and lasting beauty etc. Wall Metal Siding,Exterior Wall Siding Panel,Insulation Metal Siding Xiamen Dahe PEB Construction Technology Co., Ltd. , https://www.dahecfsbuilding.com