Press Release

Bautex Wall System Achieves High Sound Transmission Class Rating


The Bautex Wall System, a composite insu­lat­ing concrete form (ICF) man­u­fac­tured by Bautex Systems, LLC, has received a high Sound Trans­mis­sion Class (STC) rating, demon­strat­ing the noise dampening capa­bil­i­ties of the wall system that are increas­ing­ly required today in com­mer­cial, gov­ern­ment and edu­ca­tion­al building construction.

Back­ground noise inside of a building can seriously degrade the ability of building occupants to com­mu­ni­cate and work effi­cient­ly, and can con­tribute to poor overall indoor envi­ron­men­tal quality. The amount of outdoor noise trans­mit­ted through the walls of a building, or the noise between adjacent spaces inside of a building, can be sig­nif­i­cant­ly reduced by installing wall systems with high STC and Outdoor-Indoor Trans­mis­sion Class (OITC) per­for­mance ratings like the Bautex Wall System.

The Bautex Wall System finished with a single layer of plaster on the inside wall surface and stucco on the exterior wall surface achieved an STC rating of 51 and an OITC rating of 47 according to testing performed to the ASTM E 90 test protocol and conducted by ETS-Lindgren Acoustic Research Lab­o­ra­to­ry, a nation­al­ly accred­it­ed testing laboratory.

For public schools in par­tic­u­lar, The American National Standards Institute (ANSI) has developed the ANSI S12.60Acousti­cal Per­for­mance Criteria, Design Require­ments and Guide­lines for Schools” standard that aims to create a classroom envi­ron­ment that optimizes speech under­stand­ing and improves learning. As part of the ANSI S12.60 standard, exterior and interior walls of offices, con­fer­ence rooms, and main corridors in schools must be rated to a minimum STC of 45, and classroom walls must be rated to a minimum STC of 50. The Bautex Wall System finished with plaster and stucco meets these standards for school classrooms.

Higher STC ratings required for specialty spaces such as music rooms, cafe­te­rias, and gym­na­si­ums can also be achieved with the Bautex Wall System by changing the exterior and interior finishes of the wall. Using the Bautex Wall System on a project may also help achieve credits for the U.S. Green Building Council’s (USGBC®) Lead­er­ship in Energy and Envi­ron­men­tal Design (LEED®) program for enhanced acousti­cal per­for­mance in schools.

For more infor­ma­tion on the Bautex Wall System acousti­cal test protocols and results, please download the full test report at bau​texsys​tems​.com.