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Member, USGBC
N.C.F.R.® HOMASOTE®
 

N.C.F.R.® Homasote® is a structural building board and substrate for interior or exterior application, offering constant insulation against air, moisture and noise penetration. It is a UL fire-rated structural building board, UL listed (91G7) Wall Shield, and UL recognized component in floor protectors and wall shields. Fire Rated N.C.F.R. Homasote is made with 100% recycled, all wood fiber material completely impregnated with fire retardant chemical ingredients, treated for protection against termites, rot, fungus, and moisture absorption, and compressed into high-density, structural exterior building board.

N.C.F.R. Homasote qualifies for use in educational, institutional, museum, or any publicly-attended facilities. It is ideal as a tackable wall and ceiling paneling, decorative or functional display wall and tack board, or tackable substrate for other fire-rated wall coverings. It can be used as a structural component (such as wall sheathing), or as noise-deadening, resilient carpeting underlayment. It is used anywhere flame rating is a factor:

  • In residential, mobile and commercial buildings
  • As soffit board
  • In fire rated garage interiors
  • In marina interiors and exteriors
  • As interior or exterior siding for horse barns and other animal shelters

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Advantages
  • Lightweight, easy to work and handle
  • Tackable
  • Structurally strong
  • Weather resistant
  • Can be cut, shaped and made to follow moderate bends without cracking or splintering
  • Can be attached to conventional framing with nails or by glue-nailing
  • Larger size panels reduce application time and costs
Sizes & Weights (nominal)
Thickness Size Weight
1/2" 4' x 4', 4' x 8', 4' x 10' 1.5 lb./sq.ft.

Other sizes available on request

Fire ratings
Fire Hazard Classification: Flame Spread, 25; Fuel Contribution, 0;
Smoke Development, 20
Tested in accordance with: ASTME-84, UL-723
Federal Specification SS-S-118A: Glass "25"
UL: Report N0. R 5268
B.S.A. New York City Calendar No. 540-72-SM
UL MH 12093 Wall/floor component
UL Listed 91G7 Wall shield

Typical Physical Properties
Density: 34-40 lb./ft.³
Tensile parallel to surface (min.): 400-700 psi
Transverse M.O.R. (min.): 600-950 psi
Hardness, Janka Ball (min.): 275 lbs.
Water absorption by volume (max.):
  2 hrs. immersion
  24 hrs. immersion		  
5%
14%
Expansion from 50%-90%
relative humidity (max.):		  
0.30%
Noise reduction coefficient: 0.20
R-value: 0.85

Code Compliances
BSA. Approval, New York City, Calendar No. 540-72 SM
BOCAResearch Report No. 73-87
UL Report No. R-5268
Federal Spec. SS-S-118A; Class "25"
ICBO No.1016
SBCC Report 8653
UL Canada File No. CR909