Quote Originally Posted by fred View Post
Do you have wooden or plywood floors on joists or a concrete steel reinforced slab?
All I can say that the ceilings on the 2nd floor are plywood.
No idea just how much air space there is between the ceiling and the concrete slab of the 3rd floor.

As I walk up the stairs there are storage cupboards between the 2nd floor ceiling and the underneath of the 3rd floor. These storage cupboards are around 2ft top to bottom.