... is mainly used as high grade roofing materials. Features of 3-LAYER UPVC Heat Insulation Roofing Tile Strictly selected materials: The ... , alkali and corrosion: Through the international experience in application and practice of this UPVC roofing material in recent 50 years, plastic ... 1350mm, Thickness 1.5mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm Length Customerized according to the requirements Color Green, Blue ...