Term Description

The process of striking off excess concrete to bring the top surface of the concrete to the proper finish and elevation.


A woven, nonwoven or knitted fabric composed of continuous strands of material used for reinforcing or strengthening membranes.


A drainage device in the form of an outlet through a wall, parapet wall or raised roof edge typically lined with a sheet-metal sleeve.


A hatch that provides access to the roof from the interior of the building; also called a "roof hatch."


Steel Deck Institute.


See ‚"safety data sheet (SDS).‚"


(1) A material that has the adhesive and cohesive properties to form a seal; (2) a mixture of polymers, fillers and pigments used to fill and seal joints where moderate movement is expected; unlike caulk, it cures to a resilient solid.

Sealant foam

One- or two-component polyurethane foam applied as a bead and used to control air leakage; for example, at deck-to-wall transitions and/or as part of an air barrier system within the building envelope.


A coating designed to prevent excessive absorption of finish coats into porous surfaces; a coating designed to prevent bleeding.


A joint formed by mating two separate sections of material. Seams can be made or sealed in a variety of ways, including adhesive bonding, hot-air welding, solvent welding, using adhesive tape and sealant.

Secondary drainage

A term used to describe materials that have the ability to adhere to a variety of surfaces when contact is promoted by application of pressure but that require no substances to form the bond. See "pressure-sensitive.‚"

Self-adhering membrane

A membrane that can adhere to a substrate and to itself at overlaps without the use of an additional adhesive. The undersurface of a self-adhering membrane is protected by a release paper or film, which prevents the membrane from bonding to itself during shipping and handling.

Self-drying roof assembly

A term used for an existing low-slope roof assembly that tolerates small amounts of moisture vapor gain during times of vapor drive into the roof assembly from a building's interior and dries downward during times of vapor drive into the building's interior without noticeable harm to the roof assembly's components.


The ability of a material to be applied around a penetration or at a roof transition without the need for other flashing materials.


Refers to bitumen that softens with the heat from the sun and flows to seal cracks that formed in the bitumen from other causes.

Self-tapping screw

A fastener that forms receiving threads when turned in a previously drilled hole.


(1) An edge or edging that differs from the main part of a fabric, granule-surfaced roll roofing or cap sheet, or other material; (2) a specially defined edge of the material (lined for demarcation), which is designed for some special purpose, such as overlapping or seaming.

Semi-intensive (moderate depth) vegetative roof system

Vegetative roof system with a growth medium approximately 6 to 10 inches deep.

Separator layer

See "slip sheet."

Service life

(1) The period of time a building component or system will function successfully without replacement or excessive repair, assuming reasonable or expected periodic maintenance is performed; (2) the number of years of service a material, system or structure will provide before rehabilitation or replacement is required.


Slight differences in surfacing color, such as shingle granule coloring, that may occur as a result of manufacturing operations.

Shear strength

The resistance to forces that cause or tend to cause two contiguous parts of a body to slide relative to each other in a direction parallel to their contact plane.

Shelf life

The maximum time interval during which a material may be stored and remain in a usable condition according to the material manufacturer; usually related to storage conditions.


(1) A small unit of prepared roofing designed for installation with similar units in overlapping rows or courses on inclines normally exceeding 3:12 slope; (2) to cover with shingles; (3) to apply any sheet material in succeeding overlapping rows like shingles.