Demo – STC Ratings of Walls

Master Bedroom Soundproofing

While 1/2″ drywall is cost-effective, it often leads to marginalized sound attenuation in homes. Fiberglass batting and mineral may yield minimal increases, but they are primarily designed for thermal insulation, and do not have stand-alone STC ratings. For cost-effective soundproofing at home, soundproofing membranes and panels can offer a solution that meets your clients’ needs without exceeding their budget.

Listen below to the difference between walls with STCs from 30-50 for some of the most common residential construction assemblies. For sensitive areas such as Master Bedrooms, Bathrooms, In-Home Studios, and Home Offices consider adding soundproofing layers to further increase attenuation and prevent long-term noise annoyances.

HINT: Stand a few feet back or take a few steps to approximate real-world conditions.

1. Music Coming from Next Bedroom (STC=0) – Played at a standard volume of approximately 75 dBA


2. 1/2″ Drywall Each Side (ES) (STC=30)


3. 1/2″ Drywall Each Side (ES) with R13 Fiberglass Batting (STC=32) – Acceptable in Many Non-Sensitive Areas of the Home


4. 1/2″ Drywall ES with Mineral Wool (STC=34) – Rarely Acceptable in Custom or Luxury Homes with Sensitive Areas


5. 1/2″ Drywall ES with Wall Blokker Membrane (STC=37) – Sometimes Acceptable with Sufficient Background Ambient Noise in Receiving Room


6. 1/2″ Drywall ES with Wall Blokker PRO Membrane (STC=41) – Generally Acceptable


7. 1/2″ Drywall ES with Wall Blokker PRO Membrane ES (STC=46) – Very Little Sound is Audible


8. 7. 1/2″ Drywall ES with Wall Blokker PRO Membrane ES + R13 Fiberglass Batting (STC=48) – Ideal Construction for Luxury Homes in Master Bedrooms, Media Rooms, and Offices


Acoustics Expert

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