I was wondering what your thoughts are on building a room within a room and the best way to go about it... Just bought a semi-detached house that is on 3 floors, the room I want to sound-proof is in the basement at the front. The front has a small 'basement' window, the adjoining house is to the left when looking from the room out towards the 'front' of the house. The left 'party' wall is crap!! It's about three bricks wide! The front and right hand side walls are very thick stone walls. The rear wall also is very thick stone, however it uses up too much space so this will be taken out and replaced by a brick wall (with load bearing bricks). The front wall has been 'tanked' but is nearing the end of it's life so we will be building a brick wall about 2 inches away from it. The right hand side wall will remain as it is as there is no house there (might dry line it tho). The rear wall will as mentioned above be taken down and replaced with a brick wall. the left hand side wall will remain but we will build another wall giving us a gap, therefore a sound barrier. However, i was wondering what your thoughts would be on how to do the left hand side (party) wall and the rear wall - will one layer placing the bricks length-ways ( | ) to the wall (so it does not eat too much into the room) suffice? Or should we place them width-ways ( |== ) to make the wall 'thicker' ? or should we place two lots length ways ( | ) with 2inches seperating each? Or should we do one lot lenght-ways ( | ) and then 1 coat of cement and then dot n dab? Lol and then there's the rear wall! What are your suggestions there? What about the ceiling how can we stop the sound go up and 'left' that way? The floor is solid cement. Any ideas? All and any help appreciated! Just want to add the the room will be used as a studio as well as a (very) loud home cinema. Thanks. Room dimensions are as follows: length (from left to right) = 488cm Width (from front to back) = 263cm And the thickness of the stone wall at the back of the room... a whopping 52cm!! The door will be moved from the left hand side of the room to the right (ie away from next doors side! lol).