An asphalt-saturated and/or asphalt-coated felt (see Felt).
A flexible sheet manufactured by the interlocking of fibers with a binder or through a combination of mechanical work, moisture and heat. Felts are manufactured principally from wood pulp and vegetable fibers (organic felts), asbestos fibers (asbestos felts), glass fibers (glass fiber felts or ply sheets), or polyester fibers.
A mechanical device used for applying bitumen and roofing felt or ply sheet simultaneously.
Glass fibers bonded into a sheet with resin and suitable for impregnation with asphalt in the manufacture of bituminous waterproofing, roofing membranes and shingles.
An asphalt roofing base material manufactured from cellulose fibers.