One book to build from. Control room first. Three lanes. Pick your pace.
Site: 244 Woodway Dr, Elgin (steel barn) · Companion to: The Barn Studio Build Manual (the "why") This doc is the "what to do, in what order, how fast." Built from: the START-HERE notes + 120-day documented plan + 60-day sprint + 90-day plan + both budgets, merged and de-padded.
The manual tells you how a studio works. This playbook tells you what to do next, who does it, and how fast. It takes the long day-by-day plan, cuts the repeated steps and the dead cure-waiting days, adds the finishing the old plan was missing, and runs the work in three lanes at once instead of one slow line.
Finish the control room to that standard first. Shut the door. Keep dust out. Build the rest of the barn around a room that is already making money.
▶Right now: the 2-week foam sprint
Dad is here until July 15. The mission for these two weeks: clean the barn, spray the right foam, get AC running, then acid-stain the floor so the room is usable. Air-tight, much less rattle, cool, and a finished floor you can stand on.
The day-by-day field sheet
→ The 2-Week Sprint: every day mapped out (Day 1 to 14), DIY, with the orders to place today, the things to have onsite, and the deadlines. Print it and work off it.
The foam decision (this is the one that matters)
Buy CLOSED-CELL spray foam for the metal shell. Not open-cell. Not acoustic foam.
Closed-cell spray foam = the answer. It bonds to the metal, is its own air + vapor barrier (stops the sweating that rusts a Texas metal barn from the inside), adds the most R-value per inch, and stiffens the panels so they stop oil-canning and rattling. Target ~2" on the walls, ~3" on the roof.
Open-cell = wrong here. It is soft and vapor-open, so humid air reaches the cold metal and condenses behind it. Fine for some houses, bad for a sealed metal shell in humid TX.
Acoustic foam (the gray egg-crate panels) = not this at all. That is interior treatment for much later. It is not insulation and not soundproofing. Do not let anyone sell you foam panels for the shell.
Set the expectation now
Closed-cell makes the barn weather-tight, air-tight, and a lot less rattly. It does not make it a silent vault by itself. True studio isolation comes later with the room-in-room control-room walls. Foam is step one of sound control, not the whole thing.
The order (do not flip these)
When
Do
Why this order
Today
Call closed-cell foam contractors + a mini-split installer + a licensed electrician (the AC needs a dedicated circuit). Get quotes + dates.
Their calendars are the long pole. Lock them first or the 2 weeks slips.
Today
Order the floor stain TEST kit + supplies now (Direct Colors 3-color trial; you test on the actual slab). Remote site, so consolidate trips and buy extra.
Concrete reacts differently on every slab. Test patches go down the moment the slab is clean, not after the floor is finished.
Day 1
Deep clean + clear-out + screw down loose panels/trim
Crew needs clear, safe walls + roof. Tight panels = less rattle once foamed.
Day 2
Cut + sleeve every shell penetration + fix leaks/rust
The no-regrets day. Everything through the metal must exist BEFORE foam (checklist below).
Day 3–4
Lock the foam quote, product, and spray date
Confirm closed-cell, 2"/3", and the re-entry time.
Day 5–6
SPRAY FOAM (closed-cell). Nobody inside during the spray.
The shell gets sealed. Get a written re-entry time, do not guess.
Day 7–9
Install the AC (mini-split) through the pre-cut sleeve, on its own circuit
Shell is sealed, so now it actually holds temperature. Lines were roughed Day 2.
Day 9–12
Acid-stain + seal the floor (the Verdigris Rust recipe, in the manual)
After foam, never before (overspray ruins a finished floor). Run a test board THIS week so the recipe is dialed. Now the room is usable.
Day 12–14
Buffer + punch list
Cure times and trade schedules always slip a little.
Day 2: the "don't screw the future" checklist
Cut and sleeve all of these before the foam goes on. Cutting cured foam later is the nightmare.
AC: pick where the mini-split head + outdoor condenser go; cut + sleeve the line-set + condensate-drain penetration.
Power: mark the service entry + any shell penetrations; sleeve conduit stubs. Run the actual wire later in accessible conduit. Never bury wire or junction boxes in foam.
Vents: stub sleeves for fresh-air / exhaust now, even if the ERV goes in later.
Windows: decide each one now. Keep + seal/flash as-is (recommended for the sprint), or remove/replace any you KNOW you are changing. Do not foam over a window you plan to pull.
Leaks + rust: fix roof/wall leaks and treat rust. Foam must go on dry, sound metal.
Loose panels/trim: screw down anything that rattles before it gets foamed in place.
After the sprint
You will have a sealed, cooled, floored barn you can work in. That is the base for everything next: the control-room walls, the cabling, the treatment, the gear. This sprint is Phases 1 through 5 run tight. The full detail for each step is below.
0The one-page master
If you read nothing else, read this screen.
The mission
Turn the steel barn into a real recording studio that can start earning in phases. The control room is the money room, so it gets built first, correctly, all the way to client-ready. Everything else (live room, Bambi vocal booth, attic, kitchen, barn doors) comes after, funded by the room that already works.
Lock layout + order long-lead + mark every shell hole before foam
David
3
Seal the shell: closed-cell spray foam + black fire coating
Pro
4
Main comfort: one mini-split so the barn is workable
Pro + David
5
The floor: base-seal the whole slab early, protect it, topcoat last
David
6
Frame the control room (room-in-room) + rough-in power/HVAC/audio
David + Pro
7
Close walls → finish → clean → treat → gear → test → book
David
The locked calls (don't re-litigate these)
Foam = hire a pro. Closed-cell, ~2" walls / 3" roof, ~2,054 sq ft / ~5,000 board-feet. Budget by board-foot. DIY kits cost more and risk off-ratio.
Foam first, floor finish last. Never foam or dark-coat over a finished floor. Overspray ruins it and cured foam has to be ground off.
Foam the shell only. Closed-cell on the metal shell; the room-in-room cavities get open mineral wool later, never closed-cell (it shrinks the decoupled gap and kills isolation). Never trap insulation between two vapor barriers.
Wiring stays accessible. Plan penetrations before foam, but run wire after foam in conduit / chases / inner walls. No junction boxes buried in foam, ever.
Permitting = Bastrop County (the barn is county, not City of Austin). Power = licensed electrician.
Control room target = 13'7" × 17'8" × 9'6", mix seat ~38% back, sub position #5 (front wall, centerline).
Foam ≠ soundproofing. The shell handles isolation; treatment gets added later, after the room and gear are in.
The number
$145k–$175kBooking core: finished control room + Bambi booth (no studio gear)
$300k–$450kThe whole dream, DIY-heavy, staged
$85kControl room alone, smart target
The operator move
Don't try to build the whole dream at once. Build the money machine first (control room + Bambi booth), open it, then use bookings, content, and events to fund the live room, doors, attic, and kitchen.
1Pick your pace
Same phases, same order, three speeds. The difference is how hard you push, how fast the trades show up, and how much you stop to photograph and let things cure.
Track
Gets you
Real timeline
SPRINT 60
One finished, sealed, clean, client-ready control room
~60 work days if trades stay on schedule and you don't redesign
Same build, every step photographed, full cure waits, nothing rushed
~120 work days; safest, most paper trail
Read this before you panic at "120 days"
The documented plan's day count is inflated. A lot of those "days" are cure inspections and quote follow-ups: calendar waiting, not labor. You do not stand around. While foam cures, while patch sets, while a quote comes back, you work a different lane (see §2). Treat the day numbers as a sequence, not a stopwatch.
Two things the old 120-day plan got wrong (fixed here)
It built the shell twice. Days 15–27 did leak-check → foam → coating, then a "Day 28 reset" re-ran the exact same thing Days 29–42. That's ~13 wasted days. This playbook does it once, carefully (Phase 3).
It quit at primer. Day 120 ended at "primer prep" and never reached paint, plates, treatment, gear, or a paying client. This playbook carries it all the way to first paid session (Phases 9–10).
2The three lanes (work in parallel, not in a line)
The single biggest speed gain over the old plan: stop doing everything in one straight line. At any given week, three lanes are moving. When one lane is blocked (a quote, a cure, a trade's calendar), you push the other two.
Lane A: David's hands (DIY)
Clean, demo, prep, mark, frame-assist, build baffle boxes, insulation, hang/seal drywall, mud, sand, paint, build acoustic panels, dress cables, final clean. This is where DIY saves real money. Almost every day has a Lane-A task.
Lane B: The trades (schedule AHEAD)
Foam crew, licensed electrician, HVAC. They run on their calendar, not yours, so book the walkthroughs in Week 0 and lock dates early. Never let "waiting on a trade" stop the build. These are also the things you must not DIY-guess (see §8).
Lane C: Ordering (long-lead)
Polycarbonate, barn-door hardware, skylight system, mini-split, studio glass, doors/seals, cork + stain samples. Order before you're standing there waiting on it. Several of these gate the foam day because they cut the shell (see §6).
The parallel rule
Foam cures → you prep the floor. Quote is out → you build panels. Electrician is a week out → you frame. Idle is the enemy, not the trade.
3The 10 phases
The full build, collapsed from the 120-day plan into clear blocks. Each block: the goal, the done-standard (how you know it's finished), the work, who does it, what to order before it, and the gotcha that bites people here. Phase numbers (0–10) are this playbook's own; the manual's build-order section uses its own numbering for the same work, so cross-reference by name (foam, rough-in, floor), not by number.
0Start the slow clocks · do this on day one
Goal
Kick off the things that take months, so they're ready when you need them.
Done when
If the desk + slat walls will be the land's own wood, the trees are felled, milled, and stickered to dry. The Attic's use is locked (it drives what gets wired in rough-in).
Work
Wood: air-dried lumber takes ~1 year per inch of thickness, and felled logs are on a rot clock, so if you want the land's wood in the build, mill + sticker it NOW. Attic: decide its use early. A reverb chamber or amp room needs speaker + mic lines pulled during rough-in; a lounge doesn't.
Who
David (+ a mobile sawyer for the wood)
Gotcha
Both are cheap to start and impossible to rush later. Wet wood can't go in walls; an unplanned attic use means tearing open a closed wall to add lines.
1Prep & document · old days 1–8
Goal
Make the barn safe, clean, measured, and quotable. No building yet.
Done when
Barn is PPE-safe and walkable, every zone is taped on the floor, the utility spine + all before-foam penetrations are marked, the floor + cork subfloor are water/condition tested, contractor photo packs are shot, quote requests are out, and samples are ordered.
Work
P100 respirator + full PPE. Hantavirus rule (CDC): never dry-sweep or vacuum rodent droppings. Spray a fresh 1-part-bleach-to-9-parts-water mix (≈1.5 cups bleach per gallon), let it soak, then wipe into bags. Pull trash + hazards. Measure downstairs + loft like a studio. Tape the future zones, the utility spine (panel → rack → rooms → lighting → HVAC), and every "BEFORE FOAM" hole. Slab moisture test (meter + a taped-down plastic sheet overnight) so the right sealer can be sourced now. Shoot foam/electrical/HVAC/floor photo packs.
Who
David
Order now
Cork + concrete-stain samples, EMT/conduit samples, pull string, labels. (Samples only, no final finish orders.)
Gotcha
Do not stain the floor, install cork, or bury any wire on these days. This phase is "measure twice." The expensive mistakes are the ones you bury. And never pressure-wash to find leaks: it forces water into seams that rain never would, faking leaks and damaging seals.
2Lock layout & order long-lead · old days 6–14
Goal
Freeze the control-room footprint and order/decide everything that cuts the shell, before the foam crew shows up.
Done when
Control-room footprint + wall plan + material takeoff are confirmed; the foam/HVAC/electrical conflict check is done; skylight / polycarbonate / barn-door / studio-glass calls are made; every shell penetration (skylight opening, AC line-set sleeves, vent + exhaust sleeves, conduit stubs) is cut, sleeved, and curbed/flashed BEFORE FOAM; you have a usable move-in work setup in the barn.
Work
Tape the real control-room box (13'7"×17'8"). Draw the wall build. Conflict-check where foam, AC line-sets, and electrical all want the same spot. Cut + sleeve + curb every shell penetration now (skylight, AC line-sets, vents) so foam seals around finished sleeves, not raw holes you'd have to carve back open later. Set up a working base (power, light, a table) so the barn is livable.
Who
David (+ a quick structural sign-off on any big door/header)
Anything that penetrates the shell must be cut and sleeved before foam, not just decided. The hole has to physically exist and be curbed/flashed. Foam, then cut, then patch foam + flashing + coating is the nightmare you're avoiding.
3Seal the shell: foam + fire coating · old days 15–42, done once
Goal
Kill condensation and seal the metal shell. This is the first real building move and it's a pro job.
Done when
Leaks/rust fixed; closed-cell foam sprayed on the shell only (~2" walls / 3" roof) and inspected; the approved intumescent thermal/ignition barrier applied at the spec'd film thickness (with documentation); the overhead structure given its dark decorative coat. (Penetrations were already sleeved in Phase 2.)
Work
Final water/leak/rust pass (gentle rain sim, never a pressure washer) → fix the "must fix before foam" list → foam packet + go/no-go → mask everything you're not foaming → spray day (nobody inside during spray; get a written re-entry time, don't guess; isocyanate off-gassing is real) → post-foam inspection → spray the overhead structure dark (the decorative charcoal shell coat) → apply the intumescent barrier over exposed foam → cure inspection.
Who
Pro (foam + coating). David oversees + masks + inspects.
Order before
The coating: confirm it's an approved ignition/thermal barrier for your exact foam (get the product data sheet + code/ESR report), not just black paint, and that the applicator hits the spec'd wet-film/dry-film thickness with a gauge + documentation. Clear it with the Bastrop County inspector.
Gotcha
The old plan ran this whole cycle twice (a "Day 28 reset"). Don't. One careful pass. Closed-cell goes on the metal shell ONLY; the inner room cavities get open mineral wool in Phase 8 (closed-cell there kills the decoupled gap). Never sandwich insulation between two vapor barriers. Bare metal in Central Texas sweats and rots the build from inside, so the shell foam can't be skipped.
4Main comfort: HVAC for the open barn · old days 43–57
Goal
Get one real mini-split in so the barn is workable in Texas heat and you can test the rooms' heat load.
Done when
One main mini-split is installed for the live room/open barn, cooling + dehumidifying, drained, and quiet; heat-zone test results are logged.
Work
(AC shell penetrations were already cut + sleeved in Phase 2, the "forgot the AC hole" lesson.) Temp-AC heat-zone test. Pick the unit (MrCool DIY pre-charged vs multi-zone pro) and quote it both ways: 3-zone (Live/Control/Attic, kitchen = spillover) vs 4-zone, then compare the delta. HVAC + electrician quotes → rough-in → install the one main head → performance + leak check.
Who
Pro (HVAC + the electrical disconnect). David handles temp-AC testing + placement calls.
Order before
Mini-split system + line-set covers + condensate parts + wall sleeves + disconnect. Decide multi-zone-now vs add-zones-later (see §5).
Gotcha
Cooling is not ventilation. The mini-split recirculates room air; the sealed control room needs a separate quiet fresh-air path later (§5). Don't conflate them.
5The floor · old days 58–76, collapsed
Goal
A dry, clean, base-sealed slab, done after foam + the dark overhead coat, before the rooms trap it. The hero finish topcoat comes dead-last.
Done when
The whole open slab is moisture/level checked, cracks patched + cured, stained + base-sealed in one pass, then protected with ram board. The final hero topcoat is NOT on yet (that's Phase 9, after all dust).
Work
Moisture + level check → clean/degrease → patch cracks → stain → base-seal the whole open slab in one pass → ram-board protection → build on top. The slow zone-by-zone seal in the old plan (~18 days of cure-inspections) is gone: one clean pass while the slab is open, one shot.
Who
David (floor prep + seal is prime DIY-saves territory)
Order before
Stain + base sealer for the whole slab (the Phase 1 moisture test tells you grind-vs-no-grind and breathable-vs-film), ram board / floor protection. The final topcoat is ordered later.
Gotcha
Base-seal now, topcoat last: never let framing, drywall dust, or sanding land on a finished floor. Cure is calendar wait, not work; frame-prep or build panels while it sets. While sealing: keep the mini-split OFF (don't pull solvent fumes through it or blow dust onto wet coating), roll toward the exit, thin even coats, and lay solvent rags flat outside to dry (balled-up rags can self-combust).
Your call: whole slab now vs footprint only
Recommended (matches the manual + the source's own "Day 75 commit"): base-seal the whole open slab in one pass now, while it's exposed. One continuous floor, one clean shot, then protect with ram board. The faster alternative is to base-seal only the control-room footprint to reach an earning room a few days sooner, but it leaves a seam where the later whole-barn floor meets it and you finish the floor in two campaigns. Either way the final topcoat is dead-last.
6Frame the control room · old days 77–84
Goal
Build the room-in-room shell: decoupled, square, with blocking for everything that mounts later.
Done when
All framing on a sill gasket (decoupled from the slab); the floated-floor go/no-go decided before plates land; all four walls framed, door framed, room square + plumb; blocking in for treatment / cloud / rack / screen and the steel ceiling pipe-grid; sleeve + conduit rough-in started.
Work
Chalk-line on the ram-board-protected floor → decide the floated-floor go/no-go → bottom plate/track on a sill gasket → frame walls (room-in-room, decoupled from the shell) → plumb/square → add all blocking, including the ceiling pipe-grid tie into the steel + headphone-drop + mic/reamp conduit stubs → start sleeves + conduit.
Who
David (framing assist is DIY-able; get help on anything load-bearing)
Order before
All framing lumber/track, fasteners, blocking, low-voltage rings, conduit, the door + seal kit.
Gotcha
Add blocking now for every future panel, cloud, rack, screen, and the steel ceiling pipe-grid (it ties to the structure during this open window and can't be retrofitted after drywall). Frame on a sill gasket or the room stays mechanically coupled to the slab.
7Rough-in: the most important phase · old days 85–106
Goal
Every hidden system in, tested, labeled, and photographed before a single wall closes.
Done when
Power roughed + circuit-tested; HVAC baffle boxes built, lined, ducted, vibration-isolated, airflow + noise tested; the control-room fresh-air exchange (ERV/quiet fan, supply + exhaust through their own baffle boxes) installed and verified; audio/data pulled (incl. headphone drops + pipe-grid feeds), both ends labeled, continuity-tested, terminated to plates; everything photographed open.
Work
Electrical: box layout → service-wall / raceway → wire pull → circuit test. HVAC: front-low supply + rear-high return mockup → build the baffle boxes → line → connect duct with vibration isolation → add the fresh-air ERV (supply + exhaust, own baffle boxes) so the sealed room can breathe → airflow + noise test. Audio/data: pull (incl. headphone-mixer drops per room, mic-closet/reamp runs, and the pipe-grid feeds) → label → test → terminate → plates.
Who
Pro for power; David builds baffle boxes + pulls/labels audio/data.
This is where you do not rush. Label both ends of every cable. Photograph every open wall. Buried mistakes cost a wall-tear-down later. No J-boxes anywhere they can't be reached. And a sealed room with cooling but no fresh-air return is an oxygen coffin: it pressurizes and forces air through cracks, wrecking isolation. The return is mandatory.
8Close the walls · old days 107–120
Goal
Build the heavy, sealed double-wall isolation shell and get it to primed-and-clean.
Done when
Cavities insulated, two layers of 5/8" up with offset seams + damping between, perimeter sealed twice, taped/mudded (3 coats), sanded, primed. Access panels still work.
Work
Insulation (fill cavities, never the access) → first 5/8" layer + perimeter seal → Green Glue/damping → second 5/8" layer offset + seal again → tape + 3 mud coats → controlled sanding → primer + final dust wipe.
Who
David (drywall hang/finish is a big DIY-saves line; pay a pro only if you want it glass-smooth)
Visible walls get clean; hidden treatment-zone walls just get functional. Don't burn three days perfecting drywall that lives behind a fabric panel.
9Finish + seal the room · NEW (the old plan was missing this)
Goal
Turn the primed shell into a finished, sealed, dust-free, lightly-treated clean room, before any gear.
Done when
Painted; HVAC grilles + outlet covers + audio/data plates + blank plates in; lighting done + buzz-tested; door sealed (sweep/threshold/gasket); final floor topcoat laid (all dusty work is done); room deep-cleaned; broadband treatment + all mounting hardware in (corner superchunk traps, cloud backing, first-reflection backing) so final panels hang later with no drilling. Then it passes the clean-room standard (§4).
Work
Paint → trim out plates + grilles + covers → finish + buzz-test lighting → seal the door → lay the final floor topcoat (safe now, all sanding/paint is done) → final clean → mount only the broadband + messy-drilling treatment (corner traps, cloud hardware, reflection-point backing) and pre-install all panel mounting hardware. The tuned + positional panels wait for measurement (Phase 10).
Who
David (panels are a big DIY-saves line: Rockwool + wood frames + fabric; keep fibers sealed in client rooms)
Order before
Paint, plates, grilles, door seal kit, Rockwool/rigid fiberglass, panel fabric, mounting hardware, cloud hardware.
Gotcha
All sanding, cutting, and spraying ends here. Once gear enters, only clean work happens inside this room (§4). Tuned/positional treatment is NOT committed yet; it follows the measurement. Pre-install the mounting hardware now so Phase 10 needs zero drilling.
10Gear → test → tune → book · NEW (carries to first paid session)
Goal
Install gear into a clean room, prove it works, tune it, and take the first booking.
Done when
Rack/desk/monitors/sub in + cables dressed; system test passes (power, AC noise, light buzz, monitors, patchbay, tie lines, headphones); a real test session records + plays back clean; then REW measurement with the room full → speaker/sub placement + the tuned/positional panels hung on the pre-set hardware; operational checklist signed off. Booking photos shot.
Work
Move gear in → dress + label cables → full system test → run a fake real session → measure (REW) with the room full, then tune speakers/sub/panels → lock the operational checklist. (The Bambi booth + live-room come next in the outward build; the booth gets its own quiet supply + return, planned like the control room.)
Who
David
Order before
Speaker stands/isolation pads, patch cables, Velcro, rack screws, measurement mic if you don't have one.
Gotcha
Don't move gear in until the room passes §4. A dusty room full of gear means you can never finish the dirty work without risking the gear.
After Phase 10
Control room is client-ready and earning. Now build outward, funded by bookings: finish the Bambi booth, the live room, the barn-door / glass feature, then The Attic + kitchen. The control room stays shut and protected through all of it.
4The control-room "done" standard
This is the gate from the 60-day sprint, and it's the heart of the whole method: the control room is not "working" until it is a finished clean room. Not halfway. Not "we'll finish the dusty stuff later."
Before gear enters, the room must pass ALL of this
Floor finished (topcoat after all dust)
Walls painted
Ceiling/cloud hardware in
Cooling working
Fresh-air exchange (ERV) working
Power working
Lighting working + no buzz
Audio/data plates in
Door sealed
No drywall dust
No open cavities
No exposed insulation
No wet mud/paint
No planned sanding inside
Broadband traps + panel hardware up
After gear enters, ONLY clean work allowed
Cable dressing, speaker placement, software, measurement, light panel tweaks, labeling, small hand-tool work. No sanding. No drywall. No cutting panels inside. No spraying. No grinding. No dust.
Once it passes: shut the door, make a clean-entry rule (mats / shoe covers), and finish the rest of the barn without ever trashing the desk, rack, monitors, or computer.
5HVAC master plan
The thing that confuses every studio HVAC conversation: cooling and breathing are two different jobs.
Job
Does
Tool
Cooling
Makes the room cold/dry. Recirculates indoor air. Does not bring in fresh air.
Mini-split
Breathing
Brings outside air in, sends stale air out. Keeps a sealed room from becoming an oxygen coffin.
ERV / quiet fan + baffle boxes
Silence
Makes the air path quiet so the vent isn't an open sound tunnel.
Baffle boxes / dead vents
How many mini-splits? Start with one.
One real mini-split in the live room / open barn first. The fastest comfort win. Then, when the control room and attic are real, decide: one multi-zone condenser feeding hidden ducted heads (Live / Control / Attic), or separate units. Kitchen/stairs can borrow spillover air at first. Don't buy 3–4 heads before the rooms are finalized.
The clean studio version (budget allows)
ONE OUTDOOR MULTI-ZONE CONDENSER
→ Live room : ducted head, long linear vent
→ Control room: hidden ducted head, quiet supply + return
→ Attic : small ducted/discreet head
PLUS a SEPARATE fresh-air system:
ERV/quiet fan → baffle box → control-room supply
control-room return → baffle box → exhaust
MrCool-style pre-charged DIY line-sets save time + money; you still want a pro to confirm BTU/zone, line-set limits, and condensate routing.
The baffle-box rule (control room)
A straight 8" hole through the wall is a sound cannon. The fix is a big slow baffled path, not a small one:
Supply: front-left + front-right, low/mid-low, symmetrical, hidden in the corner bass-trap/treatment, large + slow + baffled.
Return: rear wall, high, near the rack heat, in a lined baffle box. Never a straight grille.
A return is mandatory. Cooling-only with no fresh-air exchange turns a sealed room into an oxygen coffin (high CO₂, stuffiness, headaches) and pressurizes it: air forces through cracks, killing isolation and adding noise.
Air speed: low velocity, ~100–300 FPM (closer to 100 = quieter). Tell the HVAC tech "this is a studio, I need low-velocity air." Bigger ducts, slower air, less hiss.
The fan/motor lives outside the control-room shell when possible. Use flex connectors + vibration isolation, never a rigid tie to the wall.
Flow: front-side low in → slow across the room → rear-high out. No straight sound tunnels, supply and return never side-by-side (the air short-circuits).
The phrase for the plan: "Front quiet air in. Rear high stale air out. No straight sound tunnels."
6Order-ahead / long-lead
Shell penetrations before foam. Custom pieces ordered early. Final finishes later. Custom polycarbonate, steel-door hardware, gaskets, skylight systems, and fabrication are the things that quietly add weeks. Source them now; final-order once measurements lock.
Item
When
Note
Skylight / roof daylight
Cut BEFORE foam
Buy the roof-compatible flashed/curbed assembly, not a bare sheet. Opal 16mm multiwall, not clear greenhouse plastic. The opening gets cut + curbed before foam, or you foam-then-cut-then-repair.
Barn-door polycarbonate
Samples now, final after door measure
Clear hard-coated solid (Lexan MR10 / Makrolon AR / Tuffak AR) + opal multiwall for the glow leaf. Allow for thermal movement (gaskets, not rigid clamp).
Barn-door hardware
Price now
Heavy-duty track rated for the real weight (RealCraft 800lb, RW Hardware heavy, Krownlab Baldur). Header needs structural sign-off.
Studio glass (control window)
Price now, order after framing
Two laminated panes, unequal thickness, isolated frames, one tilted. Not plexi.
DC315 charcoal/black or approved equal. Confirm if the foam contractor includes it.
Cork + stain samples
Now
Samples only. Dark marbled cork (not bulletin-board); warm mottled concrete stain. Floating preferred unless the pattern is glue-down only; order area + 10–15% waste. Full order after rooms are dry.
Studio doors + seals
Price now
Solid-core, auto bottoms, perimeter seal kits, thresholds. Order after rough openings lock.
Send these the night you finish the photo packs (Phase 1). Word them so the trade can quote accurately without a second visit.
Spray foam
I'm converting a metal barn in the Austin/Elgin area into a recording studio.
I need closed-cell spray foam on the metal shell and roof deck for condensation,
air sealing, and thermal control. Rough target: 2" on walls, 3"+ at the roof.
Please quote with an option for black/charcoal intumescent coating over exposed
foam. I need prep requirements, ventilation time, fire-barrier documentation,
and whether the coating is included or separate.
Electrician
I'm converting a metal barn into a recording studio. I need a power plan BEFORE
spray foam, but I want wiring to stay serviceable through conduit, cable tray,
chases, and accessible boxes. Scope: subpanel/dedicated circuits, HVAC power,
lighting, outlets, rack power, exterior lights/cameras, and low-voltage pathways
for audio/network/video. No junction boxes buried in foam.
HVAC
I'm converting a metal barn into a recording studio/lesson/lounge space.
Closed-cell spray foam is planned on the shell. I need a quiet HVAC plan, likely
mini-split or ducted mini-split, with fresh-air/dehumidification strategy,
condensate drain routing, and line-set penetrations planned before foam. This is
a studio. I need low-velocity air (around 100–300 FPM), not standard residential.
Concrete floor
I want to stain the downstairs concrete later, after foam and overhead work. Can
you inspect the slab for stain readiness, oil/sealer contamination, grinding
needs, and crack repair, and recommend a warm mottled satin finish?
8Budget gates
Spend in this order. Build the money machine first; let it fund the rest.
Booking core total: $145k working · $170k–$175k safe with 15% contingency
4 · Live room basic
~$60k
Vibe-clean, not drywall-perfect. Sealed floor + tie lines + selective treatment.
5 · Barn doors / glass feature
~$50k
The front feature. Pro on the structural header + big glass/poly.
6 · Attic / loft
~$90k
Writer's layer + school. Pro on stairs/rail/structure.
7 · Kitchen / hospitality
~$60k
Keep simple unless food/drink sales justify it. Pro on plumbing.
Where DIY actually saves
Acoustic panels, Bambi interior, paint/stain/finish, live-room vibe, and daily cleanup/protection. These are labor, not risk.
Where DIY screws you: never guess these
Electrical safety + panel, AC sizing + humidity, structural loft/stairs/rail, big door/header loads, large glass/polycarbonate install, roof leaks, plumbing code, fire/life safety. "Save $15k in labor, lose 4 months and redo $8k of work" is the trap.
9The weekly rule + daily standup
Every Sunday/Monday, answer six questions
What must be done this week?
What blocks next week?
What needs to be ordered now (long-lead)?
Which trade needs scheduling?
What dusty work must happen before gear enters?
What can wait?
Every work day, the three-lane check
Lane A: what am I building/prepping with my hands today?
Lane B: is a trade scheduled or do I need to chase one?
Lane C: is anything I'll need in two weeks not ordered yet?
Stay locked
The fast timeline only holds if you don't redesign every week. Lock the layout, order ahead, and keep the control room the single focus until it passes §4. The attic, kitchen, and barn decor do not get attention until the money room is done.
10Synthia research queue
Videos to feed Synthia (/watch) for the HVAC + vent build. This is also a content opportunity: there aren't many good studio-HVAC videos on YouTube.
Topic
Link
Cheap in-studio AC, pre-filled refrigerant
youtube.com/watch?v=FUO_iiah_yA
Good AC vent system
youtube.com/watch?v=7doDzD72oUc
Ventilation
youtube.com/watch?v=AWWRzo0jR8Q
How loud is a mini-split vs other
youtube.com/watch?v=a_BKeMlYDoU
Vent science (validate)
youtube.com/watch?v=Ek3-ZTFJxxY
MrCool comes up everywhere: pre-charged, saves time + money, want a 3- or 4-zone. Confirm the power requirement before install.