Garage to single room studio

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tl_balk
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Joined: Sun, 2025-Apr-20, 15:55
Location: The Netherlands

Garage to single room studio

#1

Postby tl_balk » Fri, 2025-Apr-25, 14:59

TL;DR: Planning to transform a garage (55m2) to a single-room studio (with iso booth)

Who am I

Hi all! I've recently joined the forum - what a great place!
Let me introduce myself first. My name is Tom. I'm a 30-year-old guy from The Netherlands. I've always been involved with music, one way or another. I started out with playing piano, having had lessons during most of high school. Somewhere half way through I picked up electric bass. I then studied bass guitar at a conservatory. That is also when I started producing (mostly electronic) instrumental music. For the last 3-4 years I've been playing mostly acoustic guitar. I work full-time as a mobile app developer these days and music has become more of a hobby again.

My girlfriend and I have been fortunate enough to buy a freestanding house with a freestanding garage on the same property. The objective is to transform that entire garage to a studio. We expect to get the keys to the house end of June this year. Although I won't start building the studio for some time (we plan on renovating the 2nd floor first), I would like to prepare as best I can!

Post continues below
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Purpose

Producing and creating
I produce (semi-) electronic music, something I mainly do in Ableton Live with synthesizer plugins. I often incorporate electric (bass)guitar and my hardware Moog.
I also produce hiphop with a group of friends. This is usually done on the spot, where some of us take turns in adding ideas to the beat while others hang around the room, writing lyrics. At some point, we start recording vocals.

Mixing
I like being in control and that includes being in control of the process. So I usually mix my own recordings/productions. I'm not so much interested in mastering (yet).

Recording bands/groups
Something I'm not doing yet but do often dream of, is recording bands. However, I see that many bands nowadays do multi-tracking (recording one instrument at a time) which can be done in a single room I suppose.
I often fantasise about this growing organically up to a point where I could dial back my main job with one day a week - but this is not something I want to lay (financial) pressure on.

Goals
I want to be able to have an acoustic drum kit in there without disturbing the neighbours. I also want the large room to not disturb the neighbours either - so I basically want to sound isolate the entire building (if that's sensible/possible). I of course would love the room to sound good - I hope the size of it is adequate (one of the reasons to let go of a live-/control room was size constraints).

The plan

The garage in question is built with cavity walls. It is about 55m2 in surface area and has a flat roof, with two skylights in it.
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floorplan_garage.jpg (41.13 KiB) Viewed 33 times


At first I really wanted to create a layout that includes a control room, live room and iso booth. Also because it just look cool as hell. But I later realised that this would compromise the control room too much - while I expect to spend the vast majority of time in that control room. So, I am now pretty set on it becoming a single room studio with a separate iso booth (large enough to also record drums).
double_room_design.jpg

single_room_design.jpg


Right now I'm still very much in the preparation stage. I've finished reading Rod Gervais' book and I've started on Philip Newell's book.
I plan to have a proper HVAC system in there and a dedicated circuit/breaker box, with a "star layout" (I understood that this is best for studios).
I would love a window in the drum booth to be able to see the performer while recording.

Questions
    1) Any feedback on my single-room layout? Any oversights?
    2) Is it true that the brick walls will be the outer leaf?
    1) And that it's best to beef up the brick wall from inside the garage with double layer gypsum board?
    2) To then build a room within (including an air gap of 2" between the leafs), constructed of a single wall (outside-to-inside: ~100mm insulation and then double gypsum board)?
    3) Will this structure yield enough transmission loss to keep my neighbours from hearing drums / bass guitars? (from my experience rehearsing with bands, I think 108-112dB is the max. volume)
    3) I'll probably need to decouple the drum/iso booth from the main room
    1) For the walls/ceilings that seems somewhat straight forward - but what about the floor?
    2) In general - how do I best construct a floor over the concrete slab?
    4) Is an air-lock necessary to the outer world?
    5) Is an air-lock necessary between the drum booth and main room?
    6) Based on the first plan, with the control+live rooms, I estimated the material costs for the walls only, to be around 6K euros. Is that realistic? If you'd have to guess: what would the entire single-room studio build roughly cost? I plan to do as much of the building I can myself (and some handy friends). HVAC and some of the electrical will probably have to be done by a contractor.

Some rough material cost numbers:
Plasterboard (9.5mm) per m2: 3.25 EUR
44mm x 94mm x 1000mm wooden beam: 2.50 EUR
100mm thick fiberglass per m2: 6.35 EUR

Thank you for reading - any and all feedback will be greatly appreciated! :D

Cheers, Tom



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tl_balk
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Posts: 2
Joined: Sun, 2025-Apr-20, 15:55
Location: The Netherlands

Garage to single room studio

#2

Postby tl_balk » Sat, 2025-Apr-26, 13:56

So after digging into @GraGra's post last night (thanks for sharing, by the way, looks fantastic!) I got some ideas. Mainly the sliding door is something I would love to add to the drum booth. I also saw Soundman2020's advice regarding walls/isolation in that same thread, which I tried to apply to the design below. I aim to reduce 55-60dB TL based on (expected) noise levels of ~110dB.

I've made the transition to digital (Sweet Home 3D)! It was a bit finicky at first but it definitely beats pencil and ruler... I've basically put in the walls (which I think is double brick, so 10cm brick (common brick size in the Netherlands), 5-7 (I took 7)cm cavity, and again 10cm brick: 27cm in total exterior wall). I drew them so that the inside dimensions match that of the floorplan included in my home's brochure... (I wish I could go there and measure, but I can't until I get the keys)

Then I measured an 180mm cavity to my inner "room". I am following (from what I understand, at least) Soundman2020's advice here. After the 180mm cavity, I made an 112mm inner wall, built up as follows: 69mm studs (filled with isolation), then 18mm OSB (for sheer strength?), then 12.5mm gypsum, again 12.5mm gypsum.

Question:
Am I correct that I am making a cavity+inner wall, from my exterior wall, for both the drum booth as well as the control room - without connecting the two inner rooms? A two-leaf system? MSM? See my plans below - I wonder if they make sense!

digital_design_1.png



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gullfo
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Location: Panama City Beach, FL USA

Garage to single room studio

#3

Postby gullfo » Sat, 2025-Apr-26, 14:37

curious - did you do any measurement of existing isolation? your garage door and skylights will likely be your weakest but it's good to do actual testing esp with any connected structure as the flanking paths will be the thing that limits your ability to properly isolate drums and low frequencies.

as far as the 180mm gap - that may be too much wasted space given your frame inner walls and ceiling will have built in air gap (filled with insulation) and if the replacement of the garage door and enhancing the skylights solve the weaker points of boundary mass, you may gain a lot more floor space without sacrificing isolation. dunno until you test.

once you have decided on the layout - plan your HVAC immediately. waiting will simple result in pain and suffering later. fresh is is a requirement in a hyper sealed hyper insulated space - even drummers need the CO2 removed and some oxygen as well.

another important consideration - you want a critical listening space - i'm not seeing the geometry in your latest room designs which would make for a good critical listening space - esp as your looking for a good live space as well. so think through how important the critical listening space is vs the live space.




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