By the LGS FrameX Team · Updated October 2026
Steel stud partitions can deliver excellent sound isolation when built correctly. The performance comes from the whole assembly, not the studs alone.
Sound ratings in brief
Wall sound performance is described by Sound Transmission Class (STC). Higher numbers mean better isolation. Ratings come from tested assemblies, so follow the listing exactly.
Add mass
Extra layers of gypsum board add mass, which blocks airborne sound. Staggering joints between layers helps.
Fill the cavity
Fibrous insulation, such as mineral wool or fiberglass batts, absorbs sound inside the cavity and noticeably improves STC compared with an empty wall.
Decouple the layers
Resilient channels, staggered studs or double-stud walls reduce vibration transfer between sides of the wall. Screws must not bridge the resilient channel to the studs.
Seal every gap
Sound leaks through gaps. Apply acoustical sealant at the perimeter and around penetrations, and avoid back-to-back electrical boxes. For multi-unit buildings, see multi-family framing.
Frequently asked questions
What STC can a steel stud wall reach?
Depending on the assembly, from modest ratings for single-layer walls to high ratings with double layers, insulation and decoupling. Use a tested listing.
Do thicker studs improve soundproofing?
Not as much as insulation, extra board layers and decoupling do.
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