Optimizes Acoustics
Sound Control Through SANCTUARY Cellulose Insulation
By absorbing and reducing noise between rooms, SANCTUARY® by Greenfiber® cellulose insulation cuts sound by up to 60%,1 creating quieter, more comfortable spaces. This high-performance, blow-in or spray-applied cellulose insulation for soundproofing fills gaps and hard-to-reach areas to block noise, boost privacy and improve acoustics. It also creates an energy-smart, eco-friendly layer of comfort that helps lower stress from unwanted noise, support better sleep and overall health, and even enhance focus and learning.
Video
Quiet by Design
See how Greenfiber insulation helps block sound transfer, optimizing acoustics for a quieter, more comfortable space.
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Reduces Sound Power by up to 60%
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Seamless Fit in Any Space
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Guaranteed for the Life of the Home2
Best-in-Class Sound Control
Proof Is in the Performance
Sound Transmission Class is a numerical rating in decibels (dB) of an assembly’s ability to reduce airborne sound transmission over a limited frequency range. The single-number ratings correlate with sound transmission for speech, radio, television and similar sources of noise. Installing cellulose insulation such as Greenfiber FRM within a wall cavity provides a significant improvement in the STC rating and brings notable peace and quiet to a living environment.
Identical Assemblies
The noise transmitted through the Greenfiber wall with an STC of 60 is half as loud as the other wall with an STC of 50.3
Other
V324 Assembly
Spray Foam & Fiberglass
STC 50
STC 50: Loud speech can be heard with some effort. Music easily heard.
Greenfiber
U370 Assembly
Greenfiber FRM with 1 Layer of Drywall
STC 60
STC 60: Loud speech essentially inaudible. Music heard faintly.
50% quieter than V324 Assembly
Greenfiber
U370 Assembly
Greenfiber FRM with 2 Layers of Drywall
STC 66
STC 66+: Loud speech inaudible. Loud music heard faintly.
70% quieter than V324 Assembly
Other
V324 Assembly
Spray Foam & Fiberglass
STC 50
STC 50: Loud speech can be heard with some effort. Music easily heard.
Greenfiber
U370 Assembly
Greenfiber FRM with 1 Layer of Drywall
STC 60
STC 60: Loud speech essentially inaudible. Music heard faintly.
50% quieter than V324 Assembly
Greenfiber
U370 Assembly
Greenfiber FRM with 2 Layers of Drywall
STC 66
STC 66+: Loud speech inaudible. Loud music heard faintly.
70% quieter than V324 Assembly
Featured Products
Solutions for Any Project
SANCTUARY
An eco-friendly cellulose insulation product that delivers unparalleled sound power reduction, highly effective insulation, temperature regulation and fire safety.
SANCTUARY DEFENSE
An eco-friendly, high-performance insulation that delivers everything SANCTUARY® does, but with added protection against 25 home-destroying pests.
FRM Insulation
Combined with our proprietary U370 firewall design, this formula achieves a 2-hour fire resistance rating, plus exceptional reduction in air infiltration and sound control.
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