E-Gard® hardware Window hardware made with a multistage coating process to protect both steel and zinc parts from the effects of cleaning agents as well as corrosion caused by acid rain, ultraviolet radiation, and wood preservatives. This hardware is not manufactured by JELD-WEN.
	Edge effect This refers to heat transfer at the edge of an insulating glass unit due to the thermal properties of spacers and sealants.
	Edge Waffle A wavy distortion of the nailing fin.
	Egress dual-arm operator This type of dual-arm operator has a shorter, jointed arm allowing the window to open wider to serve as an exit.
	Egress hardware To meet emergency exit requirements, this type of hinge is used in conjunction with certain casement windows to allow for a wider opening. Also known as maximum opening hardware.
	Egress Hinge A hinge used in conjunction with certain casement windows to allow a wider opening to meet emergency exit requirements.
	Egress opening This is the space between the top of the sill of the frame of an open window and the bottom part of the raised sash, multiplied by the space between the jambs of the opening. Most jurisdictions require a net clear opening of 20" wide x 24" high and not less than 5.7 square feet for exit in emergency situations.
	Egress-sized unit Windows that are large enough to be an entrance or exit from a home in an emergency. Building codes specify which rooms in a home require egress-sized windows (and in some cases how many).
	Electric raceways An electric raceway is a channel used to enclose and loosely hold electric conductors.
	Electric strikes and locks This hardware includes the plates and lock bolts that are installed in electric raceways.
	Electrochromic glazing A type of glass or other glazing material that can be switched from clear to opaque electronically.
	End This is one or more units on either one or both sides of a center picture window in a double or triple combination.
	End slider This is a vinyl horizontal slider that is not a half slide. Generally the fixed lite is wider than the vent.
	ENERGY STAR Established to recognize the energy efficiency of various products, this independent U.S. government program is responsible for developing a standard set of guidelines (based on NFRC ratings for windows and doors). ENERGY STAR guidelines are used in conjunction with a variety of building materials, including windows and patio doors.
	Entrance The exterior area of a door (usually used for the main or front entrance of a structure) with decorative exterior trim. Trim may include pilasters, entrance head or cap, or a decorative exterior casing.
	Entrance Door A door that serves as the main entrance of a structure; may be single or paired.
	Entrance head An entrance head is the portion of the entrance above the door opening. Also called entrance cap or entablature. It’s commonly used when the head is other than a pediment.
	Entry lockset This hardware allows an exterior door to be open, closed and locked.
	Escutcheon plate This is a protective plate which surrounds the keyhole of a door or patio door.
	Evergreen glass This green-tinted glass is popular in regions where shading is desired.
	Exposure coefficient This is a simple formula used to determine the correct overhang for an exterior wood door. It is Y=1/2X, where X is the measurement from the base of the door to the bottom of the overhang, and Y is the minimum depth of the overhang.
	Extension jamb Refers to wood or other material fastened to the inside edges of the window or door (may be on the outside depending on the swing direction of the product) to extend it in width and adapt to a thicker wall.
	Exterior Casing Trim around the exterior of a window or door frame that serves as the boundary moulding for the siding material.
	Exterior insulation and finish systems (EIFS) Commonly known as synthetic stucco, EIFS is an exterior cladding system composed of an adhesively or mechanically fastened foam insulation board, reinforcing mesh, a base coat, and an outer finish coat.
	Extruded cladding Aluminum cladding that is extruded by forcing it through a die.
	Extrusion A form produced by forcing material through a die.
	Eyebrow top This refers to a door with a top that gently slopes downward from the center, then slightly up on either end.
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