S | Roofing Glossary

Roofing Glossary, a collection of terms used in the roofing industry

There are 639 entries in this glossary.

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Term	Definition
Saddle	a small tapered/sloped roof area structure that helps to channel surface water to drains. Frequently located in a valley. A saddle is often constructed like a small hip roof or pyramid with a diamond-shaped base.
Sag	undesirable excessive flow in material after application to a surface.
SBCCI	Southern Building Code Congress International, Inc.
Scarfed	shaped by grinding.
Schuttle	a hatch that provides access to the roof from the interior of the building. The NRCA Roofing and Waterproofing Manual—Fifth Edition -Glossary 999
Screeding	the process of striking off excess concrete to bring the top surface of the concrete to the proper finish and elevation.
Screen Wall	a nonstructural wall erected around units or curbs on a roof. Typically the framing consists of girts with a wood or metal covering attached to the frame.
Scrim	a woven, nonwoven or knitted fabric composed of continuous strands of material used for reinforcing or strengthening membranes.
Scupper	drainage device in the form of an outlet through a wall, parapet wall or raised roof edge lined with a soldered sheet metal sleeve.
Sealant	(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 movements is expected; unlike caulking, it cures to a resilient solid.
Sealant Backing	a compressible material placed in a joint before applying a sealant.
Sealer	a coating designed to prevent excessive absorption of finish coats into porous surfaces; a coating designed to prevent bleeding.
Sealing Washer	a rubber or neoprene washer, sometimes metal-backed, typically placed on a fastener to prevent water from migrating into and through the fastener hole.
Seam	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, sealant, etc.
Seam Sample	in single-ply and sometimes modified bitumen membrane roofing, a sample from the membrane that extends through the side lap of adjacent rolls of membrane, taken for the purpose of assessing the quality of the seam.
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-drilling Screw	a fastener that taps and drills its own hole during application.
Self-sealing Shingle	an asphalt shingle containing a factory-applied strip or spots of heat sensitive adhesive intended to adhere the overlying shingle once installed on the roof and warmed by the sun.
Self-tapping Screw	a fastener that forms receiving threads when turned in a previously drilled hole.
Selvage	(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.
Service Temperature Limits	the minimum or maximum temperature at which a coating, SPF or other material will perform satisfactorily.
Set	to convert into a fixed or hardened state by chemical or physical action.
Shading	slight differences in surfacing color, such as shingle granule coloring, that may occur as a result of manufacturing operations.
Shakr Fin	an upward-curled felt side lap or end lap.
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 contrast.