Repeatedly convertible prefabricated building

The invention relates to a repeatedly convertible prefabricated building for use, for example, as a warehouse, garage or the like, of rectangular typical ground plan. The aim is to secure the edges of the individual prefabricated walls and to design the roof construction in an insulating manner. This aim is achieved by the individual walls (2) being connected by lightweight cement tiles (2.2), which are embraced by U-shaped lightweight steel sections (2.1), in their perpendicular corner regions (2.5) or in equidirectional abutting regions of a plurality of walls (2), in each case by means of a plurality of separable tack seams distributed over the height. In addition, it is envisaged that the wall construction (3) delimited by the erected walls (2) is delimited at the top by a connected roof construction (4) which is rigid, at least in the longitudinal direction, and comprises a profiled roof sheet-metal skin (4.1), a transverse crossmember (4.2) and heat-insulating panel material (4.4).