The Vileda Steam can be used anywhere you usually clean with a damp or wet cloth. If your patio has a concrete floor or is painted with cement paint, I would not use it. The mop could be damaged if the surface is coarse. The heat generated should not damage commercial floor coverings. It is important to know that you are working with moisture. This always requires a certain caution in the application.

With normal ceramic plates, you can also use this device outdoors. However, in my opinion it is more suitable for indoors, as there is a lot more dirt outside and the cloth gets dirty quickly......

Fortunately I know your terrace.... It is possible, depending on the situation. But, ....