And the first thing you can tell about such a house is its efficiency and the desire for the rational use of the existing territory. It is especially profitable to make such houses if you decide to make a house one -story. Firstly, thanks to the attic, you can significantly increase it in the area, and due to this increase to save on the occupation of free hundredths of the Earth. In fact, you will have the same two -story house, but just the second floor will be slightly smaller than the standard house.