... heat preserving decorating metal board is a new kind of light-weight building material. 1)Polyurethane Sandwich Panel or heat ... water prroof, impact resisting, pressure resisting, fire proof, quake resisting, light weight, easy to construct, beautiful, durable, energy efficient, environment friendly ... fix the panel.First ,fix the keel on the wall surface and then hang the panel directly on the keel,so ...