Portland Metro · Oregon
Soundproof Drywall Installation in Portland, OR
QuietRock, resilient channel, double-layer 5/8" and sealed detailing — real sound isolation.
Soundproofing is an assembly, not a product. Adding 'thicker drywall' alone rarely delivers the isolation people expect. We build sound-rated walls and ceilings that measurably reduce sound transmission between spaces.
What soundproof drywall installation really involves
Real sound isolation comes from four things: mass, decoupling, damping and sealing. That means enough drywall (mass), a break in the sound path with resilient channel or a second stud row (decoupling), viscoelastic damping between two layers (QuietRock or similar), and sealed penetrations at outlets, ducts and top plates. Any one of those steps skipped drops the whole assembly's performance.
For home theaters, primary bedrooms next to shared walls, home offices on Zoom all day, and any wall between an ADU and the main house, we build to a target STC (sound transmission class). Standard interior walls are STC 33–35 (you hear normal speech clearly). We routinely build to STC 50–60, which drops normal speech to unintelligible and heavy bass to a low thump.
Ceiling isolation is a different problem — footfall from upstairs is impact sound, not airborne sound, and needs a different detail (isolation clips, resilient channel and a dropped ceiling assembly). We design and build both.
What we cover under soundproof drywall installation
Home theater walls and ceiling
STC 55–60 assemblies with QuietRock, resilient channel and sealed penetrations.
Primary bedroom demising walls
Sound-rated walls between primary and adjacent living space.
Home office soundproofing
Zoom-quiet home offices for remote work — including door and outlet detailing.
ADU sound separation
Sound-rated wall and ceiling between ADU and main house for privacy and code.
Music room / studio walls
Higher-mass assemblies for practice rooms and small studios.
Rental / duplex demising walls
Code-required sound rating for shared walls in ADUs and small multi-family.
Between-floor ceiling isolation
Resilient clips and channel for impact-noise reduction from upstairs.
Our process
The same repeatable process on every soundproof drywall installation job — no surprises, no hand-offs.
- 01
Sound goal review
What sound are you trying to block, and to what level? Sets the assembly.
- 02
Assembly design
Single vs double stud, RC vs isolation clips, mass layer count — spec'd to hit your target STC.
- 03
Cavity insulation
Mineral wool or high-density fiberglass batts (not standard low-density) for absorption.
- 04
Decoupling layer
Resilient channel or isolation clips installed to break the sound path.
- 05
First and second drywall layer
5/8" board first, then QuietRock or a second 5/8" layer with damping compound between.
- 06
Seal every penetration
Outlets back-boxed with putty pads, top plates sealed, door bottoms detailed.
- 07
Finish and paint
Level 4 finish, texture as preferred, prime and paint — standard finish scope on top of the sound assembly.
Why choose Aesthetic Construction
Portland's ADU boom, home theater builds in Lake Oswego and West Linn, and the rise of full-time remote workers in Beaverton, Bethany and Bull Mountain keep our sound-rated wall work busy. Downtown Portland condo owners also call us for demising wall upgrades between units.
- Assembly-based design — not just 'thicker drywall'.
- Mineral wool insulation as default in sound cavities.
- Every outlet back-boxed with putty pads — sealed penetrations matter.
- Resilient channel and isolation clips installed correctly (a common failure point).
- Target STC written into the scope — measurable outcome, not just materials.
- Licensed, bonded, insured — Oregon CCB #252320.
What you get
- Rooms actually feel private.
- Home theaters don't wake the kids upstairs.
- Zoom calls don't bleed into the rest of the house.
- ADU rental privacy meets code and tenant expectation.
Frequently asked questions
Is thicker drywall enough to soundproof a room?
No — mass alone is a small piece of the puzzle. Real isolation comes from a full assembly: mass, decoupling, damping and sealing. Skipping any one drops performance dramatically.
What is QuietRock?
QuietRock is a sound-damping drywall with a viscoelastic layer sandwiched between two gypsum layers. In the right assembly it delivers STC 45–60. We install QuietRock or equivalent (Gold Bond SoundBreak, CertainTeed SilentFX).
Do I need resilient channel?
For most walls above STC 45, yes — some form of decoupling (RC or isolation clips) is required. We spec what your target STC needs.
Can you soundproof my existing wall?
Yes — retrofit is possible but not as effective as building new. We add a second stud row with damping layers where wall thickness allows, or add a second-side layer with sealed penetrations.
How much does soundproof drywall installation cost?
Typical soundproof wall assemblies run $18–$40 per square foot depending on target STC and complexity. Free itemized estimate with recommended assembly.
Do you handle ceiling sound isolation?
Yes — resilient clips plus RC on the ceiling underside is the standard detail for reducing footfall and airborne sound from upstairs.
Do you soundproof ADU demising walls?
Yes — ADU wall and ceiling assemblies to code and beyond. STC 50+ typical for rentable ADUs.
Will the finished wall look different?
No — sound-rated walls finish the same as standard walls: Level 4, texture and paint. The mass and detailing all live inside the assembly.
Related services
Fire-Rated Drywall Installation
Type X and Type C 5/8" on garage walls, ADU separations, multi-family and commercial assemblies.
View detailsADU Drywall Services
Detached, attached and garage-conversion ADUs — code-correct fire and sound assemblies, finish, paint.
View detailsBasement Drywall Installation
Moisture-aware, mold-resistant, finish-ready drywall for Portland basement remodels.
View detailsOffice Drywall Installation
Private offices, conference rooms and open-office build-outs — clean, quiet, on schedule.
View detailsRequest a free soundproof drywall installation estimate
Written, itemized and no obligation. Reply times average under 24 hours on weekdays.
Oregon CCB #252320. Fully insured on every project. Certificates on request.
Available across the Portland metro
Soundproof Drywall Installation is available in every city we serve.