Safety glazing Glazing that breaks into small pieces when shattered, it is typically required in doors, windows within 24" of doors, stairwells, and bathtubs or windows within 18" of the floor. Either tempered or laminated glass can meet this requirement.
	Sahara glass This glass has a subtle rippled texture that resembles fine desert sand. It provides a very obscured view.
	Sash An assembly of stiles and rails that forms a frame for holding the glass in a window.
	Sash Cord The rope or chain attaching the sash to the counter balance in an older double-hung window design.
	Sash Door A door that is constructed with the bottom half made up of a wood panel and the top half made of glass to allow for a view.
	Sash glazed Sash glazed is a term to describe stationary sash glazed into frame.
	Sash keeper On casement windows, this is the hook-shaped component that’s attached to the inside surface of a sash stile.
	Sash Lift A handle built into or attached to the rail of the sash on a double-hung or single-hung window for easy opening.
	Sash Lift Button A “button” placed in the lower sash hinge that slightly lifts the casement window sash as it closes.
	Sash pack A sash pack is a type of sash replacement kit for wood double-hung windows.
	Sash pin This hardware component is designed to allow the sash to ride in the jamb liner.
	Sash retainer See sash pin.
	Sash set See stationary sash.
	Sash snubber This component on a window ensures the sash seals tightly against the frame.
	Sash stiffener A sash stiffener is a reinforcement, usually inserted into a sash profile prior to assembly, designed to increase the strength of the unit.
	Sash stile On windows, the sash stiles are the vertical edges of the sash.
	Sash Track The track on the sill of a sliding or gliding window that guides the sash as it opens and closes.
	Sash Weight The concealed weight used to counterbalance the sash in an older double-hung window design.
	Sashlock The hardware on a window that keeps the locks and unlocks the sash.
	Sawbuck See crossbuck.
	Score To inscribe a line with a sharp instrument.
	Screen Door A door that is made with screen for ventilation. See also ventilating door or combination door.
	Screen Plunger A spring-loaded pin in an insect screen that holds it in place.
	Scribe line This line is used as a guide when cutting a component to fit a door or window opening.
	SCS Scientific Certification Systems (SCS) certifies products that contain a minimum of 51 percent recovered fiber (based on a dry fiber basis).
	SDL See simulated divided lites.
	Seal failure This is the loss of the hermetic seal around the perimeter of the insulated glass (IG) unit which results in fogging between the panes of the IG unit.
	Sealant This refers to a compand used to fill and seal a joint.
	Seat board A flat board cut to fit the contour of a bow or bay window, a seat board is installed between the sill and the flat wall surface, providing a seat or shelf space.
	Sector top This is a fixed radius window where the head is a portion of a circle.
	Seedy glass Minute air bubbles create sparkle and texture in this fairly obscure glass.
	Segment top This is a feature on a window or door that’s rounded at its top.
	Segmented head See segment top.
	Sequential concealed locking mechanism This window hardware component locks sash to the frame. The mechanism is designed to be hidden from view and includes multiple locks to ensure the sash fits snugly in the frame.
	Setting Block Small pieces of vinyl or rubber in the bottom rail to protect and support the insulating glass unit.
	Shading coefficient (SC) SC is the measure of a windo7s ability to transmit solar heat, relative to that ability for 1/8" clear glass. The lower a unit’s SC, the less solar heat it transmits, and the greater its shading ability. It is being phased out in favor of the solar heat gain coefficient.
	Shadow bar A shadow bar is placed between two panes of insulated glass to simulate a spacer bar on windows with exterior applied grilles.
	SHGC rating See solar heat gain coefficient rating.
	Shim This is a spacer used between the jamb and rough opening to maintain the correct frame placement during installation.
	Shim button See sash lift button.
	Shiplap A layering method in which each layer overlaps the layer below it so that water runs down the outside and cannot get behind the layers.
	Shipping block This is a small block attached to the edges of a sash or panel to hold it properly in place during shipping.
	Shootbolt plate This is a metal plate designed to be used with shootbolt locks. It is designed to deter forced entry.
	Shutters A louver door used to cover a window or door opening or the exterior of a window to provide protection. Shutters have been around since windows were first used. By the 16th century, interior paired shutters were used throughout Europe, often stacked in two or four tiers. By the late 18th century, interior shutters were made with louvered and solid panels.
	Side Jamb The vertical frame member on either side of the window or patio door.
	Sidelight A fixed, usually rectangular window placed on either side of a door.
	Sidelight grille A sidelight grille is a decorative metal design that’s placed over the glass portion of a sidelight.
	Sight lines Sight lines refer to how one element in a home matches up to other elements. When a product, such as a window, has even sight lines, it is said to be architecturally correct.
	Sight lines These visual lines are used to align sash or panels of mulled units or units placed on the same elevation.
	Sill A main horizontal member forming the bottom of the frame of a window or door.
	Sill adaptor This is an applied trim strip for vinyl windows. A sill adaptor simulates the appearance of a true sloped sill and also provides a drainage surface.
	Sill horn An extension of the double-hung or single-hung sill, a sill horn allows brickmould or other casing to fit over the sill.
	Sill nose This refers to molding that’s designed to extend the sill.
	Sill pan A three-sided box made of sheet metal flashing, this is what a window sits in on the rough opening. It is designed to catch water that infiltrates into the rough opening and divert it to the outside.
	Sill Track The track on the sill of a sliding or gliding window or door that guides the sash or panel as it opens and closes.
	Simulated divided lites This divided lite option offers the most authentic true divided lite appearance. It includes interior wood bars, optional shadow bars between the glass, and exterior metal bars that are permanently attached to the exterior glass.
	Single Glazing The use of a single pane of glass in a window.
	Single point mortise lock A hardware system designed to have one locking point for the sash. This type of lock is concealed in a mortise.
	Single-arm operator This type of hardware for opening windows includes a handle and single arm.
	Single-hung side-load window A window with stationary top sash and a bottom sash that slides vertically. It also features a side-load removable sash that makes cleaning particularly easy.
	Single-hung tilt window This type of window has a fixed upper sash and movable lower sash that slides vertically and tilts inside for easy cleaning.
	Single-Hung Window A window with a fixed upper sash and movable lower sash that slides vertically.
	Single-pull operator This opening mechanism for awning windows uses a scissor action and has one keeper.
	Skylight A window installed in the roof to allow more light and sometimes heat into the structure. Depending on which direction they face, skylights can bring in more light and heat than windows. For example, in the summer months, an unshaded south-facing skylight will bring i
	Slab A slab refers to a complete door panel that has not been prepared for installation into a frame.
	Slide-by window This is a type of sliding window that has two moving sash. Also referred to as a bipassing window.
	Sliding Patio Door A door with one or more panels that slide horizontally.
	Sliding window See horizontal sliding window.
	Slope sill adapter This is a vinyl trim adapter used in replacement windows to fill the gap between the horizontal sill member of the replacement window and the sill of the original window frame.
	Snap bead A vinyl bead used to cover the exposed glass edge on vinyl windows, a snap bead may also be referred to as glazing bead.
	Snubbed operating system This is a mechanical system designed to pull the casement sash against the frame of the window.
	Soft-coat glass See sputter coating.
	Softwood One of the botanical groups of trees that has persistent needle-like or scale-like leaves; softwoods are evergreen and have longer-length fibers than hardwoods.
	Solar cool glass This is a reflective coating applied to glass.
	Solar Heat Gain Coefficient (SHGC) Solar heat gain coefficient is a measurement of the amount of solar radiation through a piece of glass or door material. The lower the SHGC, the fewer UV rays that cause heat gain come through the glass.
	Sole plate A sole plate is the bottom horizontal member in a frame wall. Normally composed of a single or double 2 x 4 (or 2 x 6). It is nailed to deck or rough floor and the studs are attached to the sole plate.
	Solid Core Flush Door A flush door consisting of a core of solid wood blocks or strips with cross banding and face veneers, or with face veneers only.
	Solid Door Panel A door panel consisting of solid wood, raised or beveled on one or two sides.
	Sound transmission class (STC) rating The America Society of Testing Materials (ASTM) developed sound transmission class (STC) ratings to describe the sound isolation performance of various materials. A larger number indicates a greater sound dampening effect.
	Spacer A component (usually metal) that separates the panes of glass to create the airspace in an insulating glass (IG) unit.
	Spandrel unit This is a custom window with obscure or dark glass.
	Speakeasy grille A speakeasy grille is a decorative metal design that’s placed over a door’s speakeasy.
	Spiral balance See balance system
	Splayed window This is a window unit set at an angle in a wall.
	Spread mull A spread mull is a mullion in which frames are placed a specific distance apart.
	Spring balance system This is a window balance that uses springs in the jamb liner.
	Spring Line The point in a frame where the window or door begins to curve.
	Sputter coating In this secondary manufacturing process, a thin layer of materials, usually designed to offer low-emissivity or solar-control benefits, is applied to glass.
	Square A condition that exists when two surfaces are perpendicular (90 degree angle).
	Stationary Sash or Panel A window sash or door panel, often used in combination with other types of window and sash units, that is fixed to the frame and intended primarily for viewing purposes and for admitting light.
	Steel A strong alloy of iron and carbon that contains a lower carbon content than cast iron (lower than 1.7%); used in commercial building because of its malleability under certain conditions.
	Step flash See shiplap.
	Sticking This is the detailing around the perimeter of the panels or lites on a door.
	Stile This is the vertical frame members of a sash, door, blind or screen.
	Stool An interior window framing trim piece located either under the sill or beside it.
	Stop A moulding used to hold, position or separate window and door parts.
	Storm Door or Storm Window A window or door that is hung to cover and protect and insulate an exterior window or door; typically containing glass and sometimes screening material.
	Strata™ technology This technology is used to create our IWP® Aurora™ Custom Fiberglass exterior doors. It combines door skins composed of multiple layers of resins, tinted resins, base colors and reinforcing materials. These skins are permanently bonded to our solid PolyMicro Core. This construction allows the doors to stand up to any climate—hot or cold, wet or dry.
	Stress crack A defect in an insulated glass unit, this type of crack results from a stress condition on the edge of the glass.
	Strike jamb This is the jamb of a door in which the handle set hardware is retained.
	Stucco fin This type of nailing fin on vinyl windows is specifically designed for stucco applications. The stucco fin is set back from the face of the window 1" to accommodate a three-coat stucco system.
	Stucco trim A vinyl trim strip accessory, this type of trim permits exterior stucco to flow behind it.
	Stud pocket A stud pocket is the void between two units designed to allow structural framing members.
	Style lock A lock that’s used on Windowmaster windows, it is completely encased in the sash.
	Subsill casing This type of casing is designed to fit below the sill jamb.
	Sunburst A semi-elliptical area, the lower center of which contains a sun-like figure with radiating rays; may consist of a wood panel or a glazed sash.
	Super spacer A super spacer is a polymer foam, no-metal Warm Edge spacing system. See Warm Edge Technology.
	Suspended particle device A type of switchable glazing, this device typically uses laminated glass construction with an interlayer material featuring suspended particles that align when the glass unit is charged. This provides a clear view and scatters when there is no charge, changing the glazing to translucent.
	Sweep This is the weatherstrip attached to the bottom of a door.
	Swiggle A swiggle is an all-in-one, flexible insulating glass spacer. See Warm Edge Technology.
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