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Homasote Co.
Recycled Building Products\Fire Rated Products
N.C.F.R. Homasote - page 2
Recycled Building Products\Fire Rated Products
code compliances
BSA Approval, New York City,
Calendar No. 540-72 SM
BOCA Research Report #73-87
UL Report No. R-5268
Federal Spec. SS-S-118A; Class "25"
ICBO #1016
SBCC-Report 8653
UL Canada File No. CR909
advantages
Fire rated N.C.F.R. Homasote is relatively lightweight, easy to work and handle. It can be cut, shaped and made to follow moderate bends
without cracking or splintering. It can be attached to conventional framing with nails or by glue-nailing. The larger size panels will reduce
application time and costs.
advantages (Nominal)
Thickness |
Width |
Lengths |
Weight |
Finish |
1/2" |
4' |
4', 8' |
1.5 |
natural or primed white |
8' |
12' |
natural only |
Other sizes available on request.
material composition
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.
physical data
Density, lb./ft.3 ...............................................................34-40 Tensile parallel to surface, psi (min.).......................400-700 Transverse M.O.R., psi (min.)...................................600-950 Hardness, lbs. (Janka Ball) (min.)....................................275 Water absorption by vol. (max.)
Expansion from 50%-90% rel. hum. (max.) ...............0.30% Noise Reduction Coefficient........................................... 0.20 R-value ...............................................................................0.85 |
architectural specification (Short form)
All____________ as shown on drawings shall be Class A Fire Rated N.C.F.R.® Homasote panels, natural or primed white, as manufactured by The Homasote Company, West Trenton, N.J., and installed in accordance with current Homasote instructions.
general application data
Job Conditions - Temperature & humidity conditions closely approximating those which will exist when building is occupied shall be
maintained before, during and after the application of N.C.F.R.® Homasote Panels. Installations shall not be made when building is
excessively cold, hot and/or damp. Building Site Storage-Protect N.C.F.R.® Homasote, as any valuable building product, from inclement
weather by storing on a dry platform under shelter. Keep protected in weather-capped shipping units until ready for use. If no shelter is
available, and panels must be stored at ground level, stack on skids 8" above grade and cover with polyethylene film or similar device.
Provide for ventilation to prevent condensation. Rain or snow will not normally damage weather resistant N.C.F.R.® Homasote, but panels
must be installed in a dry condition only.
Preparation for Use - Precondition panels 4' x 8' or smaller by separating and allowing them to stand exposed to normal environmental humidity for 24 hours before application. Panels larger than 4' x 8' should be lightly sprinkled with water and stacked overnight, wet side up. N.C.F.R.® Homasote, as any quality wood building material, will expand and contract with changes in temperature and humidity. Gap butt joints and trim joints 3/16" as instructed in application instructions. |
To prevent condensation damage within walls, it is good building practice to install a vapor barrier in buildings where the January mean temperature falls below 40°F.
general application instructions
Continuity of Fire-Rating - N.C.F.R.® Homasote is a Low Fire Hazard substrate for a variety of exterior or interior finishes. Any component added to or structurally combined with N.C.F.R.® Homasote when used as a siding, paneling, or underlayment should be Fire Hazard Classification rated to maintain continuity.
N.C.F.R.® Homasote as a substrate, is available with the following decorative finish facings: Burlap, Cork, and Polyester. The total component paneling maintains a Class "A" Fire Hazard Rating, also available prime coated on one side with white acrylic latex paint, with Class A rating.
Exteriors - Panels may be applied over wood sheathing or direct to framing by glue nailing or with nails only. All exposed joints must be gapped 3/16" and sealed with caulking and covered with battens. See Homasote Installation Instructions, H-8-252-5 for glue-nailing or nailing procedure and joint details.
Interiors - Apply direct to framing or solid furring by glue-nailing or with nails only. Panels may be applied to old masonry walls by glue-nailing provided old walls are flat and solid. Butt joints must be gapped 3/16" with 3/8" gaps at floor, ceiling and abutting framing. See Homasote Installation instructions H-8-252-5 for glue-nailing or nailing procedure and joint details.
Finish Paneling, or Siding - Any wood or hardboard finish paneling, or metal or vinyl siding to be applied over N.C.F.R.® Homasote must be installed with nails of sufficient length to penetrate through the Homasote and anchor into framing 1" minimum.
Underlayment on Wood Sub-Flooring - Where used as underlayment, fire rating can only be maintained when fire rated carpet and pad are used. Sub-floor must be flat (not cupped), dry, level and securely fastened to joists. Shim or sand sub-floor as necessary to provide a flat surface continuity for N.C.F.R.® Homasote panels. Panels may be applied with APA approved decking adhesive and nails, or with nails only. Gap all abutting edges 3/16" and keep edges 3/8" from all walls and partitions to avoid damage from expansion or contraction. See Homasote form H-8-252-5 for underlayment installation and floor covering application instructions.
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INSTALLATION INSTRUCTIONS
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