How to Soundproof a Music Studio: Recording Studio Walls, Doors, & STC

How to Soundproof a Music Studio

A music studio has to work in both directions. Sound from the live room can’t reach the neighbors or the bedroom down the hall, and traffic, plumbing and footsteps can’t reach the microphones. Gear and acoustic panels get most of the attention and budget, but the walls, door and ceiling decide whether the room works at all.

The good news: a studio wall is far cheaper to build right the first time than to fix later. This guide covers the STC to aim for, how common recording studio walls compare, when you need a room within a room, and how to treat the inside once it’s isolated.

Quick answer To soundproof a music studio, aim for STC 55–60 on every wall, ceiling and door around it. Add mass with mass loaded vinyl and a second layer of drywall, decouple the inner wall from the outer one (staggered or double studs, or resilient channel), seal every gap with acoustical caulk, and use a solid-core door with full seals. Acoustic panels go inside afterwards: they fix the sound of the room but don’t block noise.

What STC Rating Does a Music Studio Need?

STC (Sound Transmission Class) is the single number used to rate how well a wall blocks sound. Each 10 points sounds roughly half as loud on the other side. Our sister company Commercial Acoustics sets music rooms at STC 60 and reserves STC 65+ for studios and theaters:

Studio situation	Target STC
Vocals, voiceover or mixing on headphones in a spare room	STC 50–55
Home studio with monitors, guitar amps or keys	STC 55–60
Live room with drums or bass next to a bedroom or another tenant	STC 60–65+
Commercial studio with several rooms running at once	STC 65+ between rooms

One caution: STC is measured from 125 Hz up, so it says little about kick drum and bass guitar, which sit lower. A wall that hits its STC number can still let the low end through. That is why studios rely on decoupling and air space, not just mass.

Recording Studio Walls: Assemblies Compared

Here is roughly what common wall builds achieve. Exact numbers depend on the stud size, drywall thickness and insulation, so treat these as typical ranges:

Wall assembly	Typical STC	Good for
Single wood studs, 1 layer of drywall each side, insulated	About 35–39	Not a studio wall
Same wall + Wall Blokker™ and a second layer of drywall	About 45–50	Vocal booth, mixing room
Single studs + resilient channel + Wall Blokker™	About 50–55	Home studio with monitors
Staggered studs + Wall Blokker™ + drywall each side	About 55–60	Live room in a house
Double studs with an air gap, 2 layers of drywall each side, membrane	60–65+	Drums, bass, commercial studios

Wall Blokker™ is 1 lb per sq ft mass loaded vinyl, rated STC 26 on its own, and it adds 6 to 12 STC points to a finished wall. It goes directly on the studs under the drywall, overlapped or taped at every seam with MLV seam tape. For metal-stud studios, Wall Blokker™ Lite (0.6 lb per sq ft) adds 6 to 11 points to 20- and 25-gauge steel stud walls for a fraction of the cost. When the drawings are tight, Wall Blokker™ Pro is worth another 3 to 5 points on the same wall.

Already have finished walls? You can still add MLV over the drywall and cover it with a new layer, as in how to soundproof existing walls. But it costs more and gains less than building it in, so do the walls during construction if you can.

Room Within a Room: The Studio Standard

Professional studios are built as a room within a room: an inner shell of walls, ceiling and floor that never touches the building around it. Sound has to cross the inner wall, the air gap and the outer wall, and the vibration has no solid path to follow. It is the only reliable way to contain a drum kit or a bass rig at night.

• Walls: a separate stud wall inside the existing one, with a gap between them and insulation in the cavity.
• Ceiling: joists that span from inner wall to inner wall, not hung from the ceiling above. Leave real space: at least 18 in of total depth is common for a decoupled ceiling.
• Floor: on a concrete slab you can often skip the floating floor. Over a wood subfloor, a floating floor 3 to 6 in deep on rubber isolators stops drums and bass from driving the joists. For a lighter build, an isolation underlayment such as Floor Blokker™ under the finished floor cuts impact and airborne noise through the floor.

Real build: STC 65 in a garage Commercial Acoustics turned a band’s two-car garage near Tampa into a home music and recording studio: a room-within-a-room control room lined with Wall Blokker™ Pro, a floating floor on the slab, and 4 in absorption panels. It reached about STC 65 for roughly $5,500 in materials and labor, and the neighbors stopped complaining about late sessions.

Studio Doors, Windows, & Ventilation

A STC 60 wall with a hollow-core door in it performs like a hollow-core door. The weakest part of the room sets the result, so plan these as carefully as the walls:

• Doors: a solid-core door with perimeter seals and an automatic drop seal at the bottom. For a live room, two doors in series with a small vestibule between them (a sound lock) beats any single door.
• Control room glass: two panes of laminated glass of different thicknesses, each in its own wall frame, with a wide air gap. Tilting one pane a few degrees cuts reflections back to the engineer.
• Exterior windows: if you don’t need daylight, block them in and build the wall over them. If you do, add an interior window insert with a deep air gap.
• Air leaks: a soundproof room is an airtight room. Run acoustical caulk along every top and bottom plate, around the drywall perimeter and around every electrical box.
• HVAC: once the room is airtight it needs fresh air. Use lined, flexible duct with several bends on the way in and out, and keep the air handler off the studio structure. A straight duct is a speaking tube to the next room.

Speaker & Drum Placement in a Music Studio

Monitors and drums are the loudest sources in most studios, and how you set them up changes how much reaches the walls:

• Don’t hard-mount speakers to the walls or ceiling. The mounts turn sound into vibration in the structure, which is far harder to stop. Use stands, or neoprene isolation pads if they have to be mounted.
• Put the drum kit on a riser that sits on rubber isolators, so the kick drum doesn’t drive the floor.
• Keep amps off the floor and away from shared walls. An amp stand or isolation pad does more than you would expect.
• Use a drum shield in a live room shared with other players. It keeps the direct sound of the kit out of the other microphones, though it does not soundproof the room.
• Set one master volume. In a multi-room studio or rehearsal space, cap the system level centrally rather than leaving every room to set its own.

Acoustic Treatment for the Live Room & Control Room

Soundproofing keeps sound in. Acoustic treatment controls how the room sounds inside: echo, flutter between parallel walls and boomy corners. A studio needs both, and treatment comes after the walls are closed up.

• Control room: absorption at the first reflection points on the side walls and on the ceiling above the mix position, thick bass traps in the corners, and a back wall that doesn’t throw a hard echo at the engineer. Recording rooms commonly aim for a reverb time around 0.3 seconds.
• Live room: keep some life. Spread sound absorbing wall panels across the walls rather than covering them, and add acoustic ceiling clouds over the drums and the main mic positions.
• Vocal booth: small rooms sound boxy fast, so treat them heavily with thick panels on most surfaces.

Foam and fabric panels absorb sound inside the room, but they are light and porous, so they do almost nothing to stop sound leaving it. For a deeper look at treatment, see types of acoustic wall panels.

Home Studio vs Commercial Studio Soundproofing

A home studio in a spare room, basement or garage usually starts with finished walls and a wood structure. The order that pays off is: seal the gaps, fix the door, add Wall Blokker™ and drywall to the shared walls, then decouple if the low end still gets through. A garage on its own slab is often the best room in the house for it; see how to soundproof a garage.

A commercial studio is usually a new build-out in a steel-stud tenant space, so the walls can be designed for STC from day one: double or staggered studs, membrane in every wall, and a specified STC between each pair of rooms. Broadcast studios follow the same rules with a booth and control room; see radio studio soundproofing.

Rehearsal Spaces & Small Music Venues

A band rehearsal space is a live room without the recording gear, and the same rules apply: mass, decoupling, sealed doors. For practice rooms, drum rooms and budget fixes, see how to soundproof a music room.

A small music venue or bar stage has two jobs. To keep neighbors happy, the doors are the usual leak: add full perimeter seals and an automatic sweep, and use a vestibule at the entrance so both doors are never open at once. Then add mass and decoupling to any wall shared with a neighbor. Inside, absorption panels on the side and back walls, heavy stage drapes behind the band and carpet on the stage keep the sound clear rather than harsh.

When to Hire an Acoustic Consultant

A consultant is worth it for a commercial studio with several rooms, any room over about 2,000–3,000 sq ft, a studio under someone’s apartment, or a venue that has already been cited for noise. They can measure the levels at the neighbor’s side and design walls to a tested STC. Whoever you hire, ask the material suppliers for independent lab tests that back up their STC numbers.

Frequently Asked Questions