When designing or building a wall partition, it’s critical to understand what benefits you’ll get out of the wall assembly, and the associated costs and complications that come with more complex assemblies. The first step is to determine target STCs – how much sound do you need your wall to block? This is often dependent on the use-case of the room, and the expectations of the tenants. Just as walls in a doctor’s office may vary with those of a daycare, you’ll also have different expectations at an affordable housing development than a high-end luxury condominium.
There are numerous tools across the internet to calculate the STC of your wall design. Be sure to compare apples-to-apples, since some products may advertise an STC, but change the underlying wall assembly.
Below is a list of STC values for common partitions and assemblies, along with their estimated speech privacy and ideal applications in the real world. By utilizing soundproofing membranes and other material on the market, you can achieve these STCs at prices that weren’t previously possible with conventional construction methods.