I am going to convert an upstairs room into a home cinema room soon, and am currently in the process of researching sound proofing. I am not concerned with sound escaping to other rooms within my house, and only want to do enough to reduce (and ideally eliminate) noise going to my neighbours. I have two walls which are shared with my neighbours, so my plan is to just sound proof these walls (using the stud wall-rockwool insulation-dbl p'board method). The room will have thick underlay and carpet - do I need to add any more soundproofing under the floorboards? In the loft space above the room, I was just planning on fitting some decent loft insualtion with T&G chipboard as flooring. The loft is only used as a store room. If anyone could advise on any other measures I could or should take to improve on my current plan, it would be greatly appreciated. Many thanks.