Starting my build! UK, Newcastle (Garage)

Hey! Just a few things i need to go over before i start anything! Ive attached some pics of the garage, and drawing of it to show size. (the shelf's of course and being knocked down!!) Am trying to stop as much sound as possible from leaking out of the garage, using 2 leaf system, but with a few extra problems. The garage door is used to enter the garage, and a side door is also needed to enter a side garden. So these cant be altered! Although i thinking some extreme sealing can be done. (Make the garage door like one giant fridge door?) Anyway the walls as you can see are brick and have windows in 2 of them. Iam thinking of just putting up studs on these walls and rockwool. Will this be ok for the windows too, or put a plasterboard there then the studs? That will be leaf 1! (walls) The studs that i put in on these walls, do i run them up to the beams and then stop, or to the roof? As you can see the beams drop down quite a bit, how do i insulate them for the first leaf too? On my diagram i had to leave space for the garage door to open before i could build my room, so there's a 4ft 4" space when you walk into the garage, these walls where theres no room to make the second leaf, shall i put plasterboard on top of the studs? Lastly, the stud frames, how do i attach them to my concrete floor? BTW this is just the first step of the build, after i have the first leaf in i will start on my room and the second leaf.. I am thinking of using 8" gap from leaf 1 then leaf 2 - rockwool/studs/plasterboard/greenglue/plasterboard then the interior will probably then be lined with a material. Also if this is not the best method please feel free to make me start from scratch!

Hi there, First, seal your windows with brickwall, the same one you have on your walls. If you don't need them in the first place or they will be covered with the framing anyway, then just seal them with brickwall, so you equal the mass of your walls. Second, it seems that you are missunderstanding concepts and practice here. If your existing walls are leaf 1 , then you dont need to build a framing for these walls !!! They are your leaf 1 ! You just need to build a second framing, decoupled (means, not touching ANYTHING but the floor) that will become your second leaf. I dont want to be harsh, but you need a lot of reading before starting your build. Asking how to attach frames to your floor shouldnt be a question for a guy that plans to build a recording studio by himself . If you don't know what you are doing, then just hire someone experience to do it for yourself. Its like asking, I bought a guitar, now, where do I hit it to make it sound?

But wont i need the studs there to support the rockwool? How am i going to attach rockwool to the brick? :S Also for attaching the studs to the floor, i mean, is there a certain method? Put rubber mats under them or something? cause surely if they just go straight into the concrete, leaf 2 which also will be in the concrete would send the vibrations to leaf 1? EDIT: also what's the best rockwool for the leafs? i need to hunt it down in the UK..

The wool that acts like the spring just goes on the iiner leaf studs!. after you place framing, you just put the rockwool easiliy into the cavity so it covers nicesly the studspacing and hopefully some airgap You need to seal the studs when you bolt them to the concrete floor. Puting neoprene pads on the bottom wont decouple them since they are bolted anyway!