A fully clad hinged door measuring 2.4×2.4 m without a frame has a U-value of 1.60 W/(m²K), or 1.87 W/(m²K) with a type B1 window row. A hinged door with a frame provides a U-value of 1.58 W/(m²K) for a fully clad door of the same size. The values are calculated in accordance with EN12428 and are comparable to a well-insulated external door in industrial size.