Firewalls

Apartment Firewalls

U382

2.5 or 3 Hours of Full Load Bearing Fire Protection

Our UL-classified U382 Firewall is a proprietary design of Nu-Wool Co., Inc. that is fully load bearing and offers two and a half or three hours of protection that costs less, and saves more than other solutions on the market.

The U382 meets all the requirements of ASTM-E-119 and ANSI/UL 263. The U382 meets the requirements of firewall assemblies, and the independently loaded double wall assembly maintains its integrity beyond the nominal one-hour per side, giving the U382 a two-hour and thirty minute rating with only one layer of 5/8 inch type C gypsum board on each side. A 3-hour rating is achieved by using 2 layers of gypsum board on each side.

Nu-Wool Co., Inc. developed WALLSEAL Fire and Sound Insulation specifically for use in the U382 firewall assembly. Light green in color, WALLSEAL Fire and Sound Insulation has the same superior thermal and sound control properties of Nu-Wool Premium Cellulose Insulation.

STC tests were also done on three configurations of the U382 assembly: One using one layer of gypsum board per side achieving an STC of 53. The second test added one layer of gypsum board to one side and this wall assembly achieved an STC of 58. The third test for STC used two layers of gypsum board per side and achieved an STC of 63.

Industry Leading Two and One-Half or Three-Hour Firewall

Firewall U382Using 2 or 4 layers 5/8in.
Type C Gypsum Wallboard
Design No. U382

Underwriters Laboratories
Bearing Wall Rating 2-1/2 or 3 Hr.
Riverbank Acoustical Laboratories
STC Rating: 53, 58, 63

Other Cost Saving Firewalls

In addition to UL Design U382 described above, Nu-Wool Co., Inc. has engineered two other proprietary UL-approved, cost-saving firewall designs. UL Design U360 is a 2-hour, load-bearing firewall tested by UL that needs only three layers of 5/8" type X gypsum board resulting in savings of 25% on drywall labor and materials. Sound-absorbing UL design U369 has a high STC rating of 58 making it the design choice for sound control. All three of these innovative fire walls with limited layers of gypsum board successfully pass the stringent requirements of ANSI/UL 263 and ASTM E-119 because of the high density of Nu-Wool Premium Cellulose Insulation installed using the Nu-Wool WALLSEAL System, which slows the spread of fire by restricting the availability of oxygen. Nu-Wool Premium Cellulose Insulation has also been approved for use in over 50 additional UL listed firewall designs.

Cost Saving Two-​Hour Firewall

Firewall U360Using Only 3 layers 5/8 in.
Type X Gypsum Wallboard
Design No. U360

Underwriters Laboratories
Bearing Wall Rating 2 Hr.
Riverbank Acoustical Laboratories
STC Rating: 51

Sound Absorbing Two-Hour Firewall

Firewalls U369Using 4 layers 5/8 in.
Type X Gypsum Wallboard
Design No. U369

Underwriters Laboratories
Bearing Wall Rating 2 Hr.
Riverbank Acoustical Laboratories
STC Rating: 58

For detailed information on all of our UL listed firewall assemblies and specific STC Ratings contact us today. Or, download the Nu-Wool Architect’s Spec Book, an invaluable resource for any project or application. Call the Nu-Wool Technical Services Department at 800-748-0128 to set up an individualized lunch and learn session with one of our technical services experts.