Nu-Wool U382 2 Hour Firewall Guide

Please note that this firewall can only be installed by approved Nu-Wool U382

installers

For Information, please contact: Bill Hulstrunk (413) 668-6133

Rev 01/13

U382 Wall Construction •  Double row of staggered

2x4 studs. Opposite rows spaced 1 in. apart.

•  Bearing plates: Two layers on the top and one layer on bottom.

•  Continuous 5/8” Type C drywall on both sides.

•  Nu-Wool WALLSEAL installed at a density of 4.6 lbs/ft.3

•  Cross-bracing at mid-height or diagonally.

Side View

Top View

Cross-Bracing

Note: Unlike this picture, the 2 x 4 cross bracing should be staggered on each of the two sides of the firewall

Partition Walls and Other Issues •  In order for the type C drywall to be continuous,

the type C drywall must be installed before framing any intersecting partition walls.

•  Any partition wall framed directly against the U382 firewall without type C drywall behind it will need approval by the appropriate local code official.

•  Make sure that the type C drywall is continuous behind the stairwell, tub and shower enclosures, cabinets, built ins or any drop soffits or drop ceiling areas.

•  All wire penetrations must be fire sealed •  No gas lines or waste pipes can run inside the

firewall •  All plumbing penetrations must have U.L. approved

collars and assembly listings

Firewall Penetrations

All Outlets in Firewall Must be 2 Hr UL Approved

Electrical boxes must not exceed 100 square inches per 100 square feet

Wall Construction Review

•  Two ways to frame the wall: Blocking staggered at 4.5 feet on each of the walls or diagonal bracing between walls

•  Continuous type C drywall must be installed. •  One layer of type C drywall must be installed

prior to application of insulation. •  Minimum gap between the framed walls is 1

inch. •  4.6 lbs./ft.3 tested Nu-Wool insulation density.

Floor-Ceiling Assembly

There is no ASTM test for this area of the wall system.

•  There is no third party testing facility to ensure an hourly rating.

•  The builder/architect doesn’t need to change anything they are specifying right now.

Floor-Ceiling Assemblies •  Perpendicular floor joists.

(Rim & Band Joist application)

•  Attic, floor-ceiling assembly, and foundation details will vary.

•  Two layers of Type X drywall must extend from the bottom of the top plate on the lower wall and extended up to the top of the bottom plate on the upper wall (area circled).

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc. SEE FOUNDATION PLAN FOR

FOOTING DETAIL (FOUNDATIONSYSTEM MAY VARY)

CONTINUOUS RIMBOARDS- SEE STRUCTURALDESIGN

SECOND FLOOR

FIRST FLOOR

INSULATION PERSPECS

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

SEE FRAMING PLANS FORFLOOR SYSTEM USED(PERPENDICULAR FLOORJOIST CONDITION SHOWN)

5/8" GYP. BD. CEILING (TYP.)

2x BLOCKING @ MIDPOINT (5' MAX)

2x BLOCKING @ MIDPOINT (5' MAX)

2 LAYERS TYPE X GYP. BD.

NU-WOOL WALLSEAL - APPLIEDBETWEEN JOISTS AT A DENSITYOF 4.6 LBS./CUBIC FT. (MUST BEINSTALLED BY A NU-WOOLCERTIFIED DEALER)

DOUBLE TOP PLATE (TYP.)

5/8" GYP. BD. CEILING (TYP.)

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

FLOOR-CEILING INTERSECTIONMAY VARY BY LOCALE AND MUSTBE APPROVED BY LOCALINSPECTOR

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

Floor-Ceiling Assemblies (cont.) •  Parallel floor joists. •  The U382 wall system is

fully load bearing so this wall detail may be rare.

•  Two layers of Type X drywall must extend from the bottom of the top plate on the lower wall and extended up to the top of the bottom plate on the upper wall (area circled).

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc. SEE FOUNDATION PLAN FOR

FOOTING DETAIL (FOUNDATIONSYSTEM MAY VARY)

CONTINUOUS RIMBOARDS- SEE STRUCTURALDESIGN (Material May Vary)

SECOND FLOOR

FIRST FLOOR

INSULATION PERSPECS

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

5/8" GYP. BD. CEILING (TYP.)

2x BLOCKING @ MIDPOINT (5' MAX)

2x BLOCKING @ MIDPOINT (5' MAX)

2 LAYERS TYPE X GYP. BD.

DOUBLE TOP PLATE (TYP.)

5/8" GYP. BD. CEILING (TYP.)

SEE FRAMING PLANS FORFLOOR SYSTEM USED(PARALLEL FLOOR JOISTCONDITION SHOWN)

FLOOR-CEILING INTERSECTIONMAY VARY BY LOCALE AND MUSTBE APPROVED BY LOCALINSPECTOR

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

Floor-Ceiling Assemblies (cont.) •  Perpendicular floor joists.

(Rim & Band Joist application)

•  Attic section dependant on inspector.

•  Two layers of Type X drywall must extend from the bottom of the top plate on the lower wall and extended up to the top of the bottom plate on the upper wall (area circled).

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc. SEE FOUNDATION PLAN FOR

FOOTING DETAIL (FOUNDATIONSYSTEM MAY VARY)

CONTINUOUS RIMBOARDS- SEE STRUCTURALDESIGN

SECOND FLOOR

FIRST FLOOR

INSULATION PERSPECS

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION

SEE FRAMING PLANS FORFLOOR SYSTEM USED(PERPENDICULAR FLOORJOIST CONDITION SHOWN)

5/8" GYP. BD. CEILING (TYP.)

2x BLOCKING @ MIDPOINT (5' MAX)

2x BLOCKING @ MIDPOINT (5' MAX)

2 LAYERS TYPE X GYP. BD.

NU-WOOL WALLSEAL - APPLIEDBETWEEN JOISTS AT A DENSITYOF 4.6 LBS./CUBIC FT. (MUST BEINSTALLED BY A NU-WOOLCERTIFIED DEALER)

DOUBLE TOP PLATE (TYP.)

5/8" GYP. BD. CEILING (TYP.)

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

FLOOR-CEILING INTERSECTIONMAY VARY BY LOCALE AND MUSTBE APPROVED BY LOCALINSPECTOR

ATTIC SYSTEM MAY VARY BY LOCALE- THE ATTIC SYSTEM MUST BEAPPROVED BY A LOCAL BUILDINGOFFICIAL

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION

Floor-Ceiling Assemblies (cont.) •  Perpendicular floor joists.

(Rim & Band Joist application)

•  Foundation will vary. •  No need to change the attic

detail the builder/architect has been using.

•  Two layers of Type X drywall must extend from the foundation extending up to the top of the bottom plate on the upper wall (area circled). SEE FOUNDATION PLAN FOR

FOOTING DETAIL (FOUNDATIONSYSTEM MAY VARY)

CONTINUOUS RIMBOARDS- SEE STRUCTURALDESIGN

SECOND FLOOR

INSULATION PERSPECS

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION

SEE FRAMING PLANS FORFLOOR SYSTEM USED(PERPENDICULAR FLOORJOIST CONDITION SHOWN)

5/8" GYP. BD. CEILING (TYP.)

2x BLOCKING @ MIDPOINT (5' MAX)

2 LAYERS TYPE X GYP. BD.

NU-WOOL WALLSEAL - APPLIEDBETWEEN JOISTS AT A DENSITYOF 4.6 LBS./CUBIC FT. (MUST BEINSTALLED BY A NU-WOOLCERTIFIED DEALER)

DOUBLE TOP PLATE (TYP.)

5/8" GYP. BD. CEILING (TYP.)

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER FLOOR-CEILING INTERSECTION

MAY VARY BY LOCALE AND MUSTBE APPROVED BY LOCALINSPECTOR

ATTIC SYSTEM MAY VARY BY LOCALE- THE ATTIC SYSTEM MUST BEAPPROVED BY A LOCAL BUILDINGOFFICIAL

SEE FOUNDATION PLAN FOR WALLDETAIL (FOUNDATION SYSTEM MAYVARY)

Floor-Ceiling Assemblies (cont.) •  Perpendicular floor joists.

(Rim & Band Joist application)

•  Builders/Architects must get floor-ceiling intersection approved through local building department.

•  Two layers of Type X drywall must extend from the foundation extending up to the top of the bottom plate on the upper wall (area circled).

SEE FOUNDATION PLAN FORFOOTING DETAIL (FOUNDATIONSYSTEM MAY VARY)

CONTINUOUS RIMBOARDS- SEE STRUCTURALDESIGN

SECOND FLOOR

INSULATION PERSPECS

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

SEE FRAMING PLANS FORFLOOR SYSTEM USED(PERPENDICULAR FLOORJOIST CONDITION SHOWN)

5/8" GYP. BD. CEILING (TYP.)

2x BLOCKING @ MIDPOINT (5' MAX)

2 LAYERS TYPE X GYP. BD.

NU-WOOL WALLSEAL - APPLIEDBETWEEN JOISTS AT A DENSITYOF 4.6 LBS./CUBIC FT. (MUST BEINSTALLED BY A NU-WOOLCERTIFIED DEALER)

DOUBLE TOP PLATE (TYP.)

5/8" GYP. BD. CEILING (TYP.)

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER FLOOR-CEILING INTERSECTION

MAY VARY BY LOCALE AND MUSTBE APPROVED BY LOCALINSPECTOR

SEE FOUNDATION PLAN FOR WALLDETAIL (FOUNDATION SYSTEM MAYVARY)

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION(BASEMENT WALL TO ROOF DECK)

Acoustics

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

2x BLOCKING @ MIDPOINT (5' MAX)

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

STC 58(Double Layer of Drywall on One-Side)

2 LAYERS 5/8" GYP. BD.TOP PLATE

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

2x BLOCKING @ MIDPOINT (5' MAX)

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

STC 63(Double Layer of Drywall on Both Sides)

2 LAYERS 5/8" GYP. BD. 2 LAYERS 5/8" GYP. BD.

TOP PLATE

2 1/2 HR. RATEDSEPARATION WALL REF.U382Underwriter's Laboratories Inc.

2x BLOCKING @ MIDPOINT (5' MAX)

TOP PLATE

NU-WOOL WALLSEAL MUST BE INSTALLEDBY A NU-WOOL CERTIFIED DEALER

1" CONTINUOUS SEPARATIONBETWEEN STUD WALLSCOMPLETELY FILLED WITHWALLSEAL INSULATION (SLAB TOROOF DECK)

STC 53(Standard)

Alternate 2 Hr Firewall Design U360

This firewall design does not require the special U382 certification and therefore can be insulated by any Nu-Wool Installer

U382 Firewall Continued