01 May 1999
percentage, or in inches of rise per foot of
Shelf life--Maximum safe time to store a fluid
horizontal distance. (See also Incline)
construction material before use.
Smooth surfaced roof--A roof membrane
Shingle--(1) A small unit of prepared roofing
without mineral aggregate surfacing.
designed for installation with similar units on
overlapping rows on inclines normally exceeding
Soffit--The underside covering of any exterior
25%; (2) To cover with shingles, and (3) To
overhanging section of a roof, gable or sidewall.
apply any sheet material in overlapping rows like
Softening point--Temperature at which a
Shingling--(1) The procedure of laying parallel
bitumen becomes soft enough to flow as
felts so that one longitudinal edge of each felt
determined by an arbitrary, closely defined
overlaps, and the other longitudinal edge
underlaps an adjacent felt. (See also Ply).
Normally, felts are shingled on a slope so that
Softening point drift--Change in softening point
the water flows over rather than against each
during storage or application. (See also
lap; (2) The application of shingles to a sloped
Solid mopping--See Mopping.
SI--The international symbol for the metric unit
(Le Systeme International d'Unites).
Sprinkle mopping--See Mopping.
Sidelap--The continuous overlap of closures
along the side of a panel.
Spud--To remove the roofing aggregate and
most of the bituminous top coating by scraping
Sieve--An apparatus with square apertures for
separating sizes of material.
Spudder--Heavy steel implement with a dull,
Sill--The bottom horizontal framing member of
bevel-edged blade for removing embedded
an opening such as a window or door.
aggregate from a BUR membrane surface.
Single slope--A sloping roof with one surface.
Spunbonded--A generic name for nonwoven
The slope is from one wall to the opposite wall of
fabrics formed directly from polymer chips, spun
into continuous filaments which are laid down
Siphon break--A small groove to arrest the
capillary action of two adjacent surfaces.
Spunlaced--A hydroentangled nonwoven fabric
whereby a dry laid staple fabric is mechanically
Skylight--A roof accessory to admit light,
bonded by water jet which entangles the
normally mounted on a curbed, framed opening.
Square--A roof area of 9.29 m (100 ft ), or
intermediate between ingot and plate, with the
enough material to cover 9.29 m2 of deck.
width at least twice the thickness.
Stack vent--A vertical outlet designed to relieve
pressure exerted by water vapor between a
adjacent felts (or sheets) in a roof membrane. It
membrane and the vapor retarder or deck.
occurs mainly in roofing membranes on a slope,
sometimes exposing the lower plies or even the
Stainless steel--An alloy of steel which contains
base sheet to the weather.
a high percentage of chrominum. Also may
contain nickel or copper. Has excellent
Slope--Tangent of the angle between the roof
surface and the horizontal plane, expressed as a