. . . and now with NEW integral color!

Acoustical

New Ultra Finish [Printable version]

In many existing spaces, sound reverberates off hard surfaces—be it an office, theater, or other enclosed space -
thereby diminishing the general enjoyment or compromising the work environment.

Fellert Acoustical Plaster affords architects and designers a softer approach to those areas, creating inviting spaces
proven to provide superior acoustical performance. Fellert Acoustical Plaster can be applied to both ceilings and walls,
so freedom of design can be retained with optimum acoustical control.

Acoustical performance varies depending upon the method of application and thickness of the core material.
Special attention should be made to review the performance of the material at the actual frequencies required for the project.

All testing was performed by certified laboratories in Sweden in accordance with ASTM C423.

All ASTM C423 sound testing for the Fellert system has been conducted with test samples that contain
all the main components of the system. In a Mounting Type A test for example, the Fellert acoustical plaster
was sprayed to the 1" Fellert sound absorbing board which was adhered to the GWB substrate by
the Fellert Adhesive, thereby simulating an accurate representation of an actual installed Fellert system.

STC rating of 34 as per ASTM E90-09 (click here for test report)

test 1

Fellert Ultra Acoustical
Plaster on 1-1/2" Fiberglass
Board and 1/2" GWB

test 2

Fellert Ultra Acoustical
Plaster on 1" Fiberglass
Board and 1/2" GWB

test 3

Fellert Ultra Acoustical
Plaster on 1" Fiberglass
Board with Air Gap Behind

Sound Absorption Test Data per ASTM C423-07A
Type E-400

Test 4

Fellert Ultra Acoustical
Plaster on 1/2" GWB

Sound Absorption Test Data per ASTM C423-07A
Type A