Wood Fiber Product description

Fiberboard, historically called structural insulating board, is made primarily from wood, cane, or other organic fibers combined with a variety of binders.10 Fiberboard was popular during the two decades after World War II. During manufacture, the raw material is reduced to a pulp, and then the fibers are chemically treated with waterproofing materials. Some boards are impregnated with asphalt either during or after the manufacturing process for mois­ture resistance. Sheet size is typically V2, 25/32, or Iм, with standard lengths of 8 ft. Historically, this board type was used for interior finishes, sheathing, roof insulation, and roof deck planks.10

When used for low-slope roofing systems, the surfaces of the boards can be left plain, coated with asphalt, or impregnated with asphalt. Wood fiberboard is compatible with bitumens and adhe­sives, is impact-resistant, and is dimensionally stable. The materi­al is flammable and must be protected from an ignition source. This insulation will hold water and must be protected from moisture. The thermal resistance of wood fiberboard is stable, but the R-val- ue is relatively low.4