am i doing this right? help please

and wondering if i decide to insulate the roof with rock wool in the stud bays and 5/8s on the studs will it benefit me or take away from having a live room? i do not want to deaden my room i want my live room to sound live. same for the walls, they are concrete and i was thinking of making my double leaf go throughout my live room but as i said i dont want to take away from the character of the room. i already have concrete floors.

i am thinking of tearing it down because i dont see the use, i could knock down the bedroom wall (room to the right) and have a bigger bedroom, or i can knock down my control room wall and add another leaf to my single leaf wall to make it a double and increase my mixing room size, which currently will be approx 16 ft long and 9 ft wide, but i decided to make my mixing room larger then my room would be more square rather than rectangular....so i would probably move my desk from in front of that window i framed to the side, but would that help me or break me?

Soundman2020 wrote:

and wondering if i decide to insulate the roof with rock wool in the stud bays and 5/8s on the studs will it benefit me or take away from having a live room? i do not want to deaden my room i want my live room to sound live. same for the walls, they are concrete and i was thinking of making my double leaf go throughout my live room but as i said i dont want to take away from the character of the room. i already have concrete floors.

You will need some absorption, or maybe even diffusion in there, to tame the acosutics. If not, you'll have an echo chamber! That might be a bit too "live" for what you want. Have you decided what you want the decay time to be? Based on that you can sort of figure out how much absorption/diffusion you need. Another option is to build variable acoustic treatment, that you can open or close as needed to change the room acoustics.

i am thinking of tearing it down because i dont see the use, i could knock down the bedroom wall (room to the right) and have a bigger bedroom, or i can knock down my control room wall and add another leaf to my single leaf wall to make it a double and increase my mixing room size, which currently will be approx 16 ft long and 9 ft wide, but i decided to make my mixing room larger then my room would be more square rather than rectangular....so i would probably move my desk from in front of that window i framed to the side, but would that help me or break me?

It's hard to figure out what you mean, without an accurate diagram of what you have now, and what you are proposing. - Stuart -

I have not decided the decay time. Its honestly too subjective for me to make a logical choice. What's the average?

the concrete block will be my first leaf then a probably 3 inch air gap and 2x4 studs

with 4lb dense 4 inch thick rock wool

You just cut it a little big and wedge it in right? (The mineral wool) you dont glue it or anything?

And I was just asking if its properly "decoupled" both leaves are screwed into the same beam

Soundman2020 wrote:

I have not decided the decay time. Its honestly too subjective for me to make a logical choice. What's the average?

Depends on what you want! :) There are recommendations for different types of room. Take a look at EBU-32767 or ITU BS-775 for the recommended specs for studios.

the concrete block will be my first leaf then a probably 3 inch air gap and 2x4 studs

I think you meant "3 inch gap" not "3 inch air gap"... :) With 2x4 studs, it is impossible to have only a 3" air gap, since the studs themselves are 3-1/2" deep... With a 3 inch gap plus 2x4 studs, you have a 6-1/2" air gap.

with 4lb dense 4 inch thick rock wool

4 pcf is a bit too dense for that: ideally it should be 3 pcf (about 50 kg/m3). Can I just cut them in half? They're actully 8pcf thick......

You just cut it a little and wedge it in right? (The mineral wool) you dont glue it or anything?

Right. But with a 6-1/2", you would be better of with 6" insulation. That would give you better isolation Well my gap in between the edge of the stud (not the bays of the stud) in my control room is about an inch. And to be determined what the live room gap would be. Is 8pcf dense mineral wool too thick for each stud bay in the 1 inch air gap wall? If so what would be ideal?.

And I was just asking if its properly "decoupled" both leaves are screwed into the same beam

If they are screwed into the same beam, then they are not decoupled at all!!! The inner-leaf is an entirely separate, independent, self-supporting structure that is not attached to the outer-leaf anywhere, at any point. Not even a single nail or screw. No mechanical connection at all. So if you screwed both leaves to the same joist or beam, then you need to fix that urgently, before you carry on. That's a major error. Ive triee looking for examples of wrong ones and right ones and cant find it in a comphresivr manor. Are both the leaves not allowed to be screwed into joists? Can they just be anchored into the concrete and that be they're way of being secure? That means that one of the leafs must be shorter in height? How much shorter? If 1 leaf is screwed into a wooden ceiling joist and the other leaf is 1" away the top of the inner leaf would touch the joist of the outer leaf . (My walls are 8ft heigh and so are the joists so its a tight wedged fit) - Stuart -