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Johns Manville, a Berkshire Hathaway company, is a leading manufacturer and
marketer of premium-quality building insulation, commercial roofing, roof insulation, and specialty products for commercial, industrial, and residential applications.
JM’s product offerings include: Formaldehyde-free™ fiber glass building insulation,
commercial roofing membranes and roof insulations, filtration media, and mats and reinforcements.
Whispertone Wallboard Product Information(Download PDF)
Whispertone Wallboard MSDS Sheet (Download PDF)
Whispertone Wallboard LEED Sheet (Download PDF)
Whispertone Wallboard Recycled Content Certification (Download PDF)
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Whispertone Wallboard is manufactured from fine, rotaryprocess glass fibers bonded with a special thermosetting
resin to produce a structurally rigid board-type insulation. The top surface is smooth and uniform in color and can be produced either plain or with a Dura-Glass® mat facing.
Whispertone Wallboard can be used for office partitions, ceiling panels, wall panel applications, and HVAC equipment. The Advantages of Using Whispertone Wallboard. The borosilicate glass fibers that make up Whispertone Wallboard are incombustible and non-hygroscopic. Whispertone Wallboard does not support fungi or vermin. It is also unaffected by oil, grease, and most acids. Because of its resiliency and flexibility, Whispertone Wallboard resists settling, breakdown, sagging from vibration, and damage from impact. The countless air spaces in Whispertone Wallboard create effective sound absorption as well as thermal properties. Perceived noise from air movement and mechanical equipment is noticeably reduced.
Insulation Properties:
* Excellent Acoustical Performance Readily Fabricated
* High Tensile Strength Puncture Resistance
* Uniform Density Distribution Uniform Color
* Excellent Dimensional Stability Uniform Surface
Performance Materials
Whispertone®Wallboard
Acoustical Panel Insulation
General Properties
Composite Density: 2.5 pcf to 6.0 pcf (40 kg/m3 to 96.1 kg/m3)
Available Thicknesses: 5/8” (0.625") to 2.0” (16 mm to 51 mm)
Glass Mat Facer: Dura-Glass®
Mold Growth (per ASTM C 655): None
Width Combinations: 48” to 72” (1219 mm to 1829 mm)
Acoustical Performance
Type “A” Mounting Sound Absorption Coefficients*
Density Thicknesses Frequency (Hz)
pcf kg/m3 inches mm 125 250 500 1000 2000 4000 NRC**
3.0 48.1 1 25 0.06 0.24 0.64 0.90 0.99 1.01 0.70
4.0 64.0 1 25 0.05 0.24 0.63 0.92 1.01 1.02 0.70
5.0 80.1 1 25 0.01 0.29 0.69 0.95 1.07 1.11 0.75
5.5 88.1 1 25 0.12 0.26 0.75 1.04 1.10 1.09 0.80
6.0 96.1 1 25 0.08 0.31 0.78 1.00 1.03 1.02 0.80
6.0 96.1 2 51 0.21 0.78 1.04 1.07 1.06 1.04 1.00
*Tested in accordance with ASTM C 423
**Noise Reduction Coefficient
Thermal Conductivity (k) Btu•in./(hr.•ft.2•°F) W/mK
Whispertone®Wallboard
Accoustical Panel Insulation
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