SoundSentry STC 34

The acoustic vertical door!

The SoundSentry STC 34 acoustic sectional door conforms to the ASTM E-413 (Classification for Rating Sound Insulation) standard and is equipped with 20 gauge steel skins over a 4” thick acoustic material and high density polyurethane foam core. Thus, the SoundSentry STC 34 acoustic vertical door is also an extremely robust sectional door with a superior R-32 insulation value. It is a superior quality acoustic vertical door with the following remarkable features: high density polyurethane foam core, sound-tight tongue-and-groove joint, panel joint integral double bubble seal, triple-lip perimeter weather seal, wall acoustic compression seal, double U-rubber bottom seal and 16 gauge galvanized steel end caps. The SoundSentry STC 34 vertical door can be manually operated with a chain hoist or can be motorized with electrical accessories. It has a smooth finish with ribs, in standard white with an optional choice of enamel painted finishes based on the RAL color chart.

The SoundSentry STC 34 acoustic vertical door is recommended for the following applications:

  • film studio
  • sound recording studio
  • concert hall
  • test cell
  • acoustic enclosure
Sound Transmission Class (STC) 34

In accordance with ASTM E-413 (Classification for Rating Sound Insulation)

STC 34 
Door thickness and insulation value

4” (100 mm) thick.Insulation value is R-32.

Panel Construction

The inner core consists of sound dampening acoustic material and rigid polyurethane, foamed-in-place under high pressure between two 20ga. steel skins. 2.56 lb/ft3 (41.0 kg/m3) minimum density.


CFC-free rigid foamed-in-place polyurethane. 2.56 lbs/ft3 (41.0 kg/m3) minimum density.

 CFC Free 4 inches
Metal skins and finish

Smooth finish with ribs. Standard white. Option (extra) of custom paint with choice of color from the RAL color chart.

color chart 
Joint and Seals
Sound-tight tongue-and-groove joint with a double bubble-shaped seal


double u

External perimeter gasket system

Triple-lip, flexible PVC gasket seal, retained in an extra robust extruded aluminum retainer.

double u
Internal wall compression seal

Heavy-duty wall compression seal ensures sound tight perimeter soundproofing.

double u
Bottom gasket seal

Double U-shaped, flexible PVC gasket seal, retained in a heavy duty extruded aluminum retainer, securely fastened to the bottom of the door.

double u
Perimeter soundproofing

The external perimeter seal, the compression seal and the bottom double seal ensure a sound tight perimeter.

double u