We're about to start the conversion of a two story Victorian house into four apartments. 
1 in the basement, 1 on the ground floor 1 on the first floor and 1 on the second.  
One of the main jobs will be to create a fire and soundproof barrier between each floor.  
My question is.  
Hoping to save the original mouldings on the ceilings, is there a product out there that will both soundproof and give 1 hour fire protection we can install between the joist. 
We're looking at installing it while having floor boards removed to rewire and re-plumb.