Studio in Moscow, design phase

Hello, everyone! Firstly, I want to say a big THANK YOU to all contributors of this wonderful forum! I'm a long time reader, and I've learned so many things from you guys, it's unreal. I've build my current studio based entirely on stuff I've learned here, and it's working pretty successfully for almost two years. But since I knew I didn't had enough experience, I've simplified some things, just to be sure that I don't mess up and make the whole thing useless or very uncomfortable to work in. I.E. I don't have any windows and my live room is separated from CR by a corridor, which gives me pretty good isolation in CR. But, time to expand has come, and now I'm trying to design my new place. So I wanted to post it here to get some feedback from you guys, ant to ask some questions. I'll break this into part, hope that helps to make things more clear. So, here goes: THE SPACE For my new studio I have a big room in industrial building, on a fifth floor. The room itself is about 13m x 13m x 5m (43'x43'x16.5') with one support column (80cm in diameter) in center and three large windows on one of the walls. The floor is tile on concrete. The bad thing is that the walls are not straight, there is some niches, parts of support columns, and some corners are kind of "cut" at approx 45º. There is some heating pipes that run beneath windows that I can't remove, so I'll build my walls around them. And I can't use all of height since there are concrete support beams, so I'll use 4.5m of total height. I can use little more then 50% of that big room's floor space for my studio. THE GOAL I need to build live room, control room and a vocal booth, my lounge and some storage area will be in next room. I want to make my live room as tall as possible and to keep one of outside windows in that room. I don't think that my skills are high enough to properly build slanted walls, so I want to build my CR rectangular and treat it afterwards (like I did in my current studio, which worked really good). Also, I don't want to have door from CR to LR since I suck at building doors(I've build 6 so far, and they all suck :oops: ). So there should be a corridor from CR to LR, with doors being as far away from each other as possible. In terms of isolation, my main goal is to achieve good isolation in CR while there is a band playing in LR. And I mostly work with metal and hardcore bands (including sludge and grindcore), so levels are kinda high :evil: . I very rarely track band live though, 90% of records are done in one-by-one scenario. But just in case, I need to make sure that I can work when there is a band playing. And by that I mean that monitors at 80-85 db's are way louder than other noises. I know that lows are the main problem, but I can live with some rumble. I don't care for sound that comes to adjacent rooms (as long as it doesn't make a problem in CR), since this is an industrial facility, so neighbors is not a problem, but, just in case, I'm ready to make proper walls. THE DESIGN After some planing, I've came up with this design, here is the pic with some of the framing: And the iso view of LR: I've tried to use maximum space available, but to keep it as simple as possible, so I don't mess up while building it. For CR I just played around "good" ratios and picked one that fits in my space, while leaving enough space for LR. The ceiling of CR will be 3.2m (10.5') and for LR it'll be 4.5m (14.7'). THE QUESTIONS AND PROBLEMS My main problem is that, believe it or not, but in Russia, there is NO drywall thicker than 1/2" :cen: So, keep that in mind! The main goal is to get decent isolation in CR, so there is a couple of questions regarding that: 1)It's definitely easier and cheaper to make CR walls more massive, since they are smaller, so is it ok if build less massive walls in LR? 2) Should I build all my walls the same? Or can I make the walls that have windows in them (I.E. the walls between CR and LR) more massive and others less massive? For example, for CR I was thinking about 2 layers of 5/8" plywood for front wall and 5/8" osb + 1/2" drywall for other walls and ceiling. And for LR I was thinking about 5/8" osb + 1/2" drywall for wall that adjacent to CR and 2 layers of 1/2" of drywall for other walls and ceiling. Will that give my leafs enough mass to isolate my CR? 3)I think that I don't handle drywall good enough to glue it, especially in three layers, is it ok to use screws, or is it compromising my isolation? 4) According to local suppliers, 5/8 osb weights just several kgs more than 1/2 drywall (about 3-4 kg more), is it worth to pay more for it? Or I'm better off with one more layer of drywall? Thats it for now, but I'll surely will have some more later :) I've attached SketchUp model, so any comments on it are welcome. I'm almost done with framing of live room and did some of CR.

Hey guys, one more question raised up, do any of you have any experience working with concrete bonded particle board? It costs same as osb but have much higher density (1300kg/m3), so it should be great for leaf's mass. Is it easy to work with or is there are some complications that I should know about? I am thinking to build my walls as one layer of CBPB and two layers of drywall, but can I screw drywall to it or it won't hold screws?

Is that the same thing as fiber-cement board? Sounds like it might be similar: basically made from a mixture of cement and wood fibers, pressed into panels? Similar to tile backer board? If so, then that should work fine for studio isolation. I've used that stuff on a couple of occasions, and it is not as easy to work with as drywall: it is much tougher to cut (you need a masonry blade in an circular saw or angle grinder, or something like that), and the dust is very abrasive. It is also more brittle, and a blow or over-flexing can damage the panel easier than with drywall. But it does have the advantage that it is twice as dense, so you only need panels half as thick for the same mass. - Stuart -

Thank you so much for your reply, Stuart! It's indeed a panel that is made of wood particles bonded together with concrete. I'll use it on my CR walls with 2 layers of 1/2 drywall.