i'm confused about room shapes is this right

Hi i've started building a new recording studio in manchester england .uk i have also done a 3D model using sketch up . if anyone can look at this and give me some advice it would be most welcome . 1 the room/space is a stud wall partiioned area within a bigger room in an old 19 century mill on the 2nd floor apart from 1 wall it is a room within a room, the only other people are below which is a bed sales room the room was used by a dance school and a rock band rehersal space before me, so they don't mind noise . however i would like to reduce it as much as possible. 2 i will be building a stud wall construction using rockwool and plaster board. i will be partioning the room to make the control room and live room area's and also building 2 iso rooms for drums and vocals. 3 the stud work on the drum iso room will consist of a raised platform filled with rockwool and a chipboard floor then cover with fiberboard then lamanet flooring. the walls will be 2 seperate stud walls with an air cap of 3" between them i will be using 2 layer of plaster board on the outside 1 on each faceing board and 2 on the inside wall a total 6 layers all filled with rockwool and sealed with mastic sealant . 4 the vocal booth will be the same but a single stud only 5 the other partion walls will be floor to ceiling 2 layers of plaster board on the outside ans 2 layers on the inside plus an extra layer of fiber board to make the wall different thickness on one side. 6 the control room will be a simular construction with a false ceiling starting 9ft and then a slope at the end down to 7 ft . 7 i have about £2000 to spend total i already have half the timber and rockwool from my other studio so a head start cost wise. please look at the sketch up file and tell me what you think, please let me know if the room modes/ shapes are correct ? thanks inadvance for your replys phil blueroomstudio u.k.

Hi greeny, i'll give it a shot, some other member will confirm or correct me if i am wrong. #3 I think this is not a good idea. The plaform you are going to build will never have enough mass, you'll just end up creating a huge boomy box. Unless it's filled with sand (and make sure the floor can support it) i would not do it.

the walls will be 2 seperate stud walls with an air cap of 3" between them

Good

i will be using 2 layer of plaster board on the outside 1 on each faceing board and 2 on the inside wall a total 6 layers all filled with rockwool and sealed with mastic sealant .

I am not sure i am following you but from what i understand there should be no plaster boards in between your walls all plaster boards only goes on the outside of each walls. Please re-read article in the references section before doing anything. #5 Personaly i wouldn't spend money on fiberboard (not enough mass if it's what i think it is) i'd rather go with OSB or MDF if you want walls different thickness/ densities. Or better yet use some green glue between layer of plasterboard. #6 I'd put the control room the other way around and make it bigger, you have the space to do it. Also strive for symetry in the CR. I'd splay side walls if you can (6degres min. each). According to your plan, people will have to go from the studio through the CR to get to the bathroom ! The way you've design the whole thing, the CR become a huge "virtual corridor" ! A door from the studio to the chillout room is needed. A Bathroom next to the chill out room seems like a better design. This is just a personal observation but i wouldn't put a door that goes direcly from the CR to the studio, doors are weak points in those construction. Having a TL of 120 (just exagerating for the sake of argument) for your walls, won't do anything good if the doors only have a TL of 30. But that is just me. I'd use the chillout room as an "air lock" between the two. I think you should re-work your plan.

I agree with Eric; also, please resize your pix to 750 width so we don't have to scroll sideways to read ALL posts in this thread; thanks... Steve