What about steel floors in a two-storey building?

Because there are no issues with moisture, a steel joist floor system avoids swelling or shrinking problems associated with timber framing and floors. A viable alternative is to use a metal deck concrete floor in conjunction with steel joists. The strength and dimensional stability of steel framing lends itself to suspended concrete floors typically cast onto profiled steel decking. These floors offer thermal mass, good airborne sound insulation, and better impact sound insulation than most processed timber product floors.