| Cant Strip |
a beveled strip
of wood or wood fiber that fits into the angle formed
by the intersection of a horizontal surface and a
vertical surface. The 45-degree slope of the exposed
surface of the cant strip provides a gradual angular
transition from the horizontal surface to the vertical
surface.
|
| Capillary |
the action by which the surface
of a liquid (where it is in contact with a solid) is
elevated or depressed, depending upon the relative
attraction of the molecules of the liquid for each
other and for those of the solid. |
| Cap Sheet |
a granule-surfaced
coated sheet used as the top ply of a built-up roof
membrane or flashing. |
| Caulking |
a composition of vehicle and
pigment, used at ambient temperatures for filling joints,
that remains plastic for an extended time after application. |
| PolyChlorinated ethylene (CPE) |
a thermoplastic material, used
for single ply roof membranes, composed of high molecular
weight polyethylene which has been chlorinated. |
| Chlorosulfonated Polyethylene (CSPE or
CSM) (Hypalon) |
a synthetic, rubber like thermoset
material, based upon high molecular weight polyethylene
with suphonyl chloride, usually formulated to produce
a self vulcanizing membrane. |
| Coal Tar Bitumen |
a dark brown to black, semi-solid
hydrocarbon formed as a residue from the partial evaporation
or distillation of coal tar. It is used as the waterproofing
agent in dead-level or low-slop built-up roofs. It
differs from COAL TAR PITCH in having a lower front-end
volatility. |
| Coal Tar Felt |
See TARRED FELT |
| Coal Tar Pitch |
A dark brown to black, semi-solid
hydrocarbon formed as a residue from the partial evaporation
or distillation of coal tar. It is used as the waterproofing
agent in dead-level or low-slope built-up roofs. (For
specification properties, see ASTM Standard D 450,
Types 1 and II.) |
| Coated Base Sheet |
a felt that has been impregnated
and saturated with (or felt) asphalt and then coated
on both sides with harder, more viscous asphalt to
increase its impermeability to moisture; a parting
agent is incorporated to prevent the material from
sticking to the roll. |
| Cold Process |
a continuous, semi-flexible roof
membrane, consisting Roofing: of plies of felts, mats
or fabrics that are laminated on a roof with alternate
layers of cold-applied roof cement and surfaced with
a cold-applied coating. |
| Condensation |
the conversion of water vapor
or other gas to liquid as the temperature drops or
the atmospheric pressure rises. (See Dew-Point.) |
| Coping |
the covering piece placed on
top of a wall that is exposed to the weather. It is
usually sloped to shed water. |
| Counter flashing |
formed metal or elastomeric sheeting
secured on or into a wall, curb, pipe, rooftop unit
or other surface to cover and protect the upper edge
of a base flashing and its associated fasteners. |
| Course |
(1) the term used for each application
of material that form the waterproofing system or the
flashing; (2) one layer of a series of materials applied
to a surface (i.e., a five-course wall flashing is
composed of three applications of mastic with one ply
of felt sandwiched between each layer of mastic.) |
| Coverage |
the surface (in square feet)
to be continuously coated by a specific roofing material,
with allowance made for a specific lap. |
| CPE |
see chlorinated polyethylene |
| Crack |
a separation or fracture occurring
in a roof membrane or roof deck generally caused by
thermally induced stress or substrate movement. |
| Creep |
the permanent deformation of
a roofing material of roof system caused by the movement
of the roof membrane that results from continuous thermal
stress or loading. |
| Cricket |
a superimposed construction placed
in a roof area to assist drainage. |
| CSPE |
see chlorosulfonated polyethylene |
| Curb |
a raised member used to support
roof penetrations, such as skylights, mechanical equipment,
hatches, etc. above the level of the roof surface. |
| Cutback |
any bituminous roofing material
that has been solvent thinned. Cutbacks are used in
cold-process roofing adhesives, flashing cements, and
roof coating. |
| Cutoff |
A material seal that is designed
to prevent lateral water movement into the edge of
a roof system where the membrane terminate at the end
of day's work or used to isolate section of the roof
system. Cutoffs are usually removed before the continuation
of work. |
