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Why SANCTUARY Cellulose
Performance You Can Trust
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Streamlined Installation1Because Greenfiber FRM insulation is sprayed in after the roof goes up, conventional framing is possible. That means, in addition to being protected from the elements, the SANCTUARY Two-Hour Firewall allows all trades to work simultaneously, which normalizes the sequence of construction.
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Improved ComplianceTo meet stringent energy efficiency codes, the SANCTUARY Two-Hour Firewall uses spray-applied Greenfiber FRM Insulation that completely fills gaps, voids and hard-to-reach places, reducing unintended airflow. This high-performance system helps achieve 3 ACH50, lowering air changes per hour and eliminating costly customer callbacks.
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Enhanced Comfort for HomeownersBecause the SANCTUARY Two-Hour Firewall fills gaps so completely, sounds and odors are blocked between neighboring units. Homeowners have much more control over their own indoor air quality, which allows them to live more comfortably.
Block Fire and Sound
Best-in-Class Sound Performance. Quieter Townhomes.
The SANCTUARY Two-Hour Firewall U370 Assembly is ideal for townhomes, enabling faster construction, reducing unintended airflow and minimizing trade disruptions. With a high STC 66 rating, it also ranks among the most effective sound-blocking firewalls in the building industry.
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 50.2
Other
V321 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 is essentially inaudible. Music heard lightly. Outstanding performance.
50% quieter than V324 Assembly
Greenfiber
U370 Assembly
Greenfiber FRM with 2 Layers of Drywall
STC 66
STC 60+: Loud speech is essentially inaudible. Music heard lightly. Outstanding performance.
70% quieter than V324 Assembly
Other
V321 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 is essentially inaudible. Music heard lightly. Outstanding performance.
50% quieter than V324 Assembly
Greenfiber
U370 Assembly
Greenfiber FRM with 2 Layers of Drywall
STC 66
STC 60+: Loud speech is essentially inaudible. Music heard lightly. Outstanding performance.
70% quieter than V324 Assembly
Assembly Process
Inside the firewall design
The SANCTUARY Two-Hour Firewall consists of two opposing, offset stud walls. Each wall’s studs are spaced at the standard 16" on center. Offset by half, the studs create an 8" cavity between walls, where Greenfiber FRM Insulation is spray-applied.
Helpful Information
Expand your expertise
Explore training on Greenfiber FRM insulation and get UL certification details for SANCTUARY Two-Hour Firewall.
Greenfiber FRM Insulation
Get even more protection
Use Greenfiber FRM Insulation in combination with SANCTUARY Two-Hour Firewall for unparalleled fire resistance.
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