As an expert in construction solutions, I specialize in providing guidance on PUF sheets, a versatile and highly efficient material used in various construction applications. PUF sheet (Polyurethane Foam Sheet) is a high-performance insulation material, primarily used for thermal insulation in both residential and industrial buildings. These sheets are made by injecting polyurethane foam between two layers of metal, providing excellent thermal resistance and energy efficiency. PUF sheets are widely used in applications like cold.