01 May 1999
Filler strip--See Closure Strip.
Extruder--A machine with a driven screw that
forces ductile or semi-soft solids through a die
Film--Sheeting having nominal thickness not
opening of appropriate shape to produce
greater than (0.25 mm) 10 mils.
continuous film, strip, or tubing.
Fin--A sharp, raised edge capable of damaging
Fabric--A woven cloth of organic or inorganic
a roof membrane.
filaments, threads, or yarns.
Fabric reinforcement--A fabric, scrim, etc., used
inorganic material, more than 50% of which
to add structural strength to a 2 or more ply
polymeric sheet. Such sheeting is referred to as
on the surface of roofing.
Fishmouth--(1) A half cylindrical or half conical
Fabrication--(1) The manufacturing process
opening formed by an edge wrinkle or failure to
performed in a plant to convert raw material into
embed a roofing felt; (2) In shingles, a half
finished metal building components. The main
conical opening formed at a cut edge.
operations are cold-forming, cutting, punching,
welding, cleaning, and painting; (2) the creation
Flashing--The system used to seal membrane
of large panels of rubber from smaller calendar
edges at walls, expansion joints, drains, gravel
width sheets as in EPDM.
stops, and other places where the membrane is
interrupted or terminated. Base flashing covers
Fallback--Reduction in bitumen softening point,
the edges of the membrane. Cap or counter-
sometimes caused by refluxing or overheating in
flashing shields the upper edges of the base
a relatively closed container.
Fascia--A decorative trim or panel projecting
Flashing cement--A trowelable mixture of
from the face of a wall, serving as a weather
cutback bitumen, mineral stabilizers and fibers.
closure at gable and endwall.
Flash point--Temperature at which a test flame
Felt--A flexible sheet manufactured by the
ignites vapor above a liquid surface.
interlocking of fibers through a combination of
mechanical work, moisture, and heat, without
Flat asphalt--A roofing asphalt conforming to
spinning, weaving, or knitting. Roofing felts are
the requirements of Specification D312, Type II.
manufactured from vegetable fibers (organic
felts), glass fibers (glass fiber felts) or polyester
Fleece--Term used to describe mats or felts of
fibers (synthetic fiber mats).
usually nonwoven fibers.
Felt mill ream--The mass in pounds of 480 ft2 of
Flood coat--The top layer of bitumen used to
dry, unsaturated felt, also termed "point weight."
hold the aggregate on an aggregate surfaced
Fiber glass insulation--Blanket insulation,
composed of glass fibers bound together with a
thermoset binder, faced or unfaced, used over
material, fluid at ambient temperature, that dries
or under purlins to insulate roofs and walls,
or cures after application to form a continuous
semi-rigid boards, usually with a facer.
membrane. Such systems normally do not
Field--The "job site," "building site," or general
Fill--As used in textile technology refers to the
solvents and chalking.
threads or yarns in a fabric running at right
angles to the warp. Also called filler threads.