Georgia-Pacific Gypsum, an
innovator in the development and use of fiberglass mat-based gypsum panels,
announced that its assembly for retrofitting lightweight commercial roof decks
based on its DensDeck
Roof Board
product can reduce
sound penetration by more than 50 percent.
According to the results of acoustical performance tests
conducted in December 2009 by Architectural Testing Inc., the Georgia-Pacific
Gypsum roof deck assembly with remediation components received a Sound
Transmission Class (STC) rating of 54, versus a rating of 43 for the baseline
assembly alone. This 11 decibel improvement equals a reduction in sound
penetration of more than 50 percent.
Georgia-Pacific Gypsum showcased its roofing assembly, as
well as the testing results at the 2010 International Roofing Expo held in
February in New
Orleans.
The assembly’s significant reduction in sound penetration
is just one of its many features. Another is that the lightweight assembly is
added on to the existing roof, a sustainability benefit since it eliminates the
need to dispose of existing roofing materials. Also, when properly installed the
sophisticated design helps prevent the accumulation of moisture between the new
and old roofing assemblies, which is a common problem with retrofitted roofs.
The
DensDeck
Roof Board-based
lightweight commercial roofing sound remediation assembly includes the following
layered components, which were used in the acoustical tests: 1-inch rigid
mineral fiber board, 5/8-inch DensDeck
Roof Board, and
45-mil
TPO roofing membrane.
The
assembly
is designed for
buildings with low-slope roofs in the vicinity of airports or other high-decibel
environments. These include hotels, apartments, nursing homes, assisted living
facilities, schools and other low-rise commercial buildings.
The acoustical tests of the Georgia-Pacific remediation
assembly were conducted in accordance with four industry-standard testing
methodologies (ASTM E 90-09, ASTM E 413-04, ASTM E 1332-90 and ASTM E
22350-04).
For more information on DensDeck Roof Board, visit
www.densdeck.com.
