A loft room floor is not plane due to a steel surrounded by the middle of the floor man highly developed than the joist at the? sides. Chip board on top not level. Builder requirements to remedy by...

sides. Chip board on top not level. Builder requirements to remedy by packing joists - is this all right?
New Bedspread?
Answers:    sounds ok, if joists are strong satisfactory, remember though they were nearby to hold up a ceilling, not take the counterbalance of a floor and tons of furniture. Best get 2nd inference.
What color trim and fanlight treatments would run...
Yes,It is after all a loft floor.