i have to put up a plasterboard ceiling to skim over in my sons room due to how s**t the condition of the ceiling is at the moment. skimming over it is not an option as it is in poor condition and it is artexed from back in the 70s so obviously contains asbestos. my problem is my son has a bunk bed and the ceiling is pretty low. if i build a floating ceiling it will be to low realy but i dont really want to be be drilling into the ceiling joists unless i can do this safetly somehow. any ideas?