Specialty Doors

What Is Sound Transmission Class (STC)?

A rating used to describe how well a building assembly reduces the transmission of airborne sound.

Sound Transmission Class (STC) is a laboratory rating used to characterize how well a building assembly reduces airborne sound transmission. Door performance depends on the complete door-and-frame assembly, seals, installation, and surrounding construction.

Buying Considerations

Look for tested assembly data rather than relying on the door slab alone. Confirm the target rating, frame, perimeter seals, threshold or sweep, glazing, and wall assembly because gaps and installation details can reduce real-world performance.

Collections

  • Collection

  • Collection

  • Collection

  • Collection

  • Collection

  • Collection

Back to top
Report an Issue