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Black Acoustical Board

Purposefully engineered for restaurants, theaters and other places where good acoustical performance is needed. The minimalistic design of the black surface adds good aesthetics to walls and ceilings. It's smooth yet strong — able to resist damage during installation and operation.

Applications

Certifications
Product Features
Proven Performance
Delivers ideal acoustics. Designed with a black mat facing delivering good aesthetics and a smooth surface, this board is your go-to for reducing sound transmission.
Quality Design
From install to day-to-day performance, this product delivers. With a brown base board and tough black mat facing, trust it to resist damage during installation and operation.
ECOSE® Technology
Our patented, bio-based binder is a smarter alternative to using phenol formaldehyde. It’s been foundational in our commitment to sustainability. For the world we live in.
Product Details
Technical Data
Technical Data
Property (Unit) Test Performance
Maximum Service Temperature ASTM C411 250° F (121° C) 
Mold Growth ASTM C1338, G21, G22 Pass
Water Vapor Sorption (by weight) ASTM C1104 3% or less
Surface Burning Characteristics (flame spread/smoke developed) ASTM E84, UL 723, CAN/ULC S102 UL Classified FHC 25/50
Forms Available
Forms Available*
Density Thickness R-Value Width Length
2.25 PCF (36 kg/m³) 2" (51 mm) R-8.7 24" (610 mm) 48" (1219 mm)
3.0 PCF (48 kg/m³) 1" (25 mm) R-4.3
1½" (38 mm) R-6.5
2" (51 mm) R-8.7

*Some products listed may be custom products. All custom product requests require approval from Knauf Insulation, regardless of whether the product has previously been produced. Special pricing and minimum order quantities will apply.
Thermal Conductance “C” and Resistance “R”
Thermal Conductance “C”1 and Resistance “R”2 |  ASTM C177 
Mean Temperature 75° F (24° C)
Product Conductance "C" Resistance "R"
2.25 PCF (36 kg/m³) 2" (51 mm) 0.11 (0.62) 8.7 (1.53)
3.0 PCF (48 kg/m³) 1" (25 mm) 0.23 (1.31) 4.3 (0.76) 
1½" (38 mm) 0.15 (0.85) 6.5 (1.15)
2" (51 mm) 0.11 (0.62) 8.7 (1.53)
“C Units” BTU ft2 ∙  hr  ∙ ˚F W m2 ∙ ˚C  “R Units” ft2 ∙  hr  ∙ ˚F BTU m2 ∙ ˚C W

1The lower the value, the better the performance. 2The higher the value, the better the performance.
Sound Absorption Coefficients
Sound Absorption Coefficients | ASTM C423, Type A Mounting
Product Octave Band Center Frequency (cycles/sec.)
Density Thickness 125 250 500 1000 2000 4000 NRC
2.25 PCF (36 kg/m³) 2" (51 mm) 0.26 0.62 1.05 1.07 1.04 1.05 0.95
3.0 PCF (48 kg/m³) 1" (2 mm) 0.13 0.24 0.56 0.83 0.92 0.98 0.65
1½" (38 mm) 0.19 0.41 0.89 1.02 1.03 1.04 0.85
2" (51 mm) 0.33 0.67 1.07 1.07 1.03 1.06 0.95
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