Soundproof Drywall Installation in Greenville, SC
Soundproof drywall in Greenville, SC adds 25% to 70% to standard drywall cost depending on the assembly — single-layer QuietRock runs about $40 to $60 per panel installed, while double-layer-with-Green-Glue assemblies are the gold standard for home theaters and shared walls. Sound transmission class (STC) ratings climb from 33 (standard) to 60+ with proper assemblies.
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What Is Soundproof Drywall?
Soundproof drywall reduces sound transmission between rooms through two mechanisms: mass (heavier walls block more sound) and decoupling (separating wall layers stops vibration). The most common Greenville approaches are: 1) single-layer QuietRock 510 — a sandwich panel that replaces standard 5/8-inch drywall, easy to install, STC ~52; 2) double-layer standard drywall with Green Glue damping compound between, STC 56–60; 3) full decoupled assembly with resilient channels or staggered studs plus double layers, STC 60+, used for home theaters.
Soundproof Drywall Cost in Greenville, SC
Standard 5/8-inch drywall in Greenville runs about $25–$30 per panel installed. QuietRock 510 runs about $55–$80 per panel installed (more than double standard cost). A double-layer-plus-Green-Glue wall adds $4–$6 per square foot over single-layer Level 4. Home theater full assemblies (decoupled, double-layered) typically add $8–$14 per square foot.
Our Soundproof Drywall Process
- 1Walk the room and define the goal — block voices, block bass, or both.
- 2Spec the assembly: single QuietRock layer, double layer with Green Glue, or full decoupled.
- 3Coordinate insulation (mineral wool batts inside cavity).
- 4Hang first layer with acoustic sealant at all perimeter gaps.
- 5Apply Green Glue (if specified) and second layer, offset seams.
- 6Tape, finish, and seal all penetrations (outlets, can lights) with putty pads.
Why Choose Professional Soundproof Drywall in Greenville?
Soundproofing is detail work — leaving a gap at the floor plate or skipping acoustic sealant around an outlet erases most of the assembly's STC rating. We've installed home theater walls and shared-bedroom assemblies across Greenville and know which details actually move the needle.
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