We provide PUF panels, which have a stiff core sandwiched between structural sheets of sheet metal and are suited for a variety of applications. Sandwich panels with PUF insulation combine joists and studs, insulation, and vapor and air barriers. The primary advantage of this panel is its eco-friendliness, which reduces the need for air conditioning and maintenance expenses. Additionally, the material utilized includes stainless steel, coated steel, FRP, aluminum, plywoods, and flexible board, among other things.