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Testimonials
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Please use our glossary to help become more familiar with the words, terms and phrases commonly found and used in the screens, windows and doors industry. You may either display the set of terms by A-Z or use our search form below to look for a particular term.
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| Daylight Transmittance |
| The percentage of visible light that glazing transmits through a window – a standard clear dual pane without considering whether a window frame has a daylight transmittance of 82%. |
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| Dead Latch |
| A latch bolt having an auxiliary feature which prevents its retraction by end pressure when in a projected position. |
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| Dead Lock And Latch |
| A hardware item containing both a deadbolt and latch bolt. |
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| Deadload |
| A static applied load. A load without movement. |
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| Debridge |
| The process of cutting away the metal on the bottom of an aluminum thermal break cavity once the two-part polyurethane has reached full strength, thus creating a thermally broken extrusion. |
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| Decibel |
| Unit used to measure sound. The human ear can normally detect a decibel change of 1 to 3. Normal conversation is around 60 dB while a 747 jet at takeoff is around 125 dB. |
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| Decibel Loss |
| A measure of reduction of sound. |
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| Deflection |
| The measure of movement of a member from its static position when subjected to loads. |
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| Degree Day |
| A unit that represents a one-degree Fahrenheit deviation from some fixed reference point (usually 65° F) in the mean, daily outdoor temperature. See also heating degree day. |
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| Desiccant |
| A porous crystalline substance used to absorb moisture and/or sealant solvents from within the sealed air space of an insulating glass unit (IGU). |
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| Design Load |
| The project’s wind load to be determined by the architect and expressed in psf, e.g., "the project design load shall be 38.7 psf, both positive and negative." It is also referred to as the project’s Design Pressure. |
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| Designation Number |
| Prescribed by AAMA. One for each window style. It provides a code for architectural selection, e.g., STYKER SK-5000 = H-C45 = Double Hung - Commercial Grade - 45 psf Design Pressure. |
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| Dewpoint |
| The temperature at which water vapor in air will condense at a given state of humidity and pressure. |
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| Die |
| A perforated steel block through which aluminum or vinyl is extruded. |
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| Divided Light |
| A window whose glass is separated by true divided lite (see TDL), simulated divided lite (see SDL) or by muntins. |
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| Divided Lites |
| Division of light by the use of muntin bars.
Muntins: The actual bars that create a pattern in the window.
Grilles: Wood muntins fastened to the interior of the sash to create the effect of divided lites, removable for easy glass cleaning. Integrity offers two types:
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Profiled Grilles-Between-the-Glass - muntins appear between panes of glass to give the look of divided lites with easy cleaning.
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Wood Interior Grilles - a grille appears on outer surface of the interior glass, featuring spring-loaded pins to make removal and cleaning easy.
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| Dome |
| The spherical shape associated with skylights. |
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| Door Backset |
| Dimension from the face plane of door to the face plane of frame. |
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| Door Clearance |
| The margin of clearance around the edge of a door, between door and frame. |
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| Door Closer |
| A device or mechanism to control a door during its opening and closing cycle; may be overhead or floor mounted and either exposed or concealed. |
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| Door Frame |
| An assembly of members, consisting of jambs and a header, into which a door or doors fit when closed. The door frame may also include transom lights and adjacent sidelights. Also see Threshold. |
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| Door Handing |
| Determined by placing your back to the hinge jamb. If the door swings to your left it is a left-handed door. |
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| Door Holder |
| A hardware device designed to limit the swing of a door and hold it in an open position. |
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| Door Jamb |
| One of two vertical members of a door frame. The hinge jamb is the jamb to which the hinges or pivots are mounted; the lock jamb is the jamb at the leading edge of the door where a lock bolt may be engaged. |
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| Door Light |
| The glass area in a door. |
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| Door Opening |
| The opening dimension of a doorway is measured from inside of jambs and from floor line to underside of frame header. The opening size is usually the nominal door size and is equal to the actual door size plus clearances and threshold height. |
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| Door Size (Actual) |
| The actual width and height of the swing door leaf. |
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| Door Size (Nominal) |
| See Door Opening. |
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| Door Stop |
| a) A molding or projecting element on a door frame which overlaps the edge of a door, causing it to stop in its closed position. b) A bumper mounted on the floor or wall to limit the extent of the door opening. c) An accessory feature of a door holder. |
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| Dormer |
| A space which protrudes from the roof of a house, usually including one or more windows. |
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| Double Glazing |
| In general, two thicknesses of glass separated by an air space within an opening to improve insulation against heat transfer and/or sound transmission. In factory-made double-glazing units, the air between the glass sheets is thoroughly dried and the space is sealed airtight, eliminating possible condensation and providing superior insulating properties. |
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| Double Pitch Design |
| Pertaining to two opposite roof slopes, e.g., sloping North and South; also referred to as a ridge connection. |
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| Double Pitch With Hip Terminating Each End Of A Ridge Connection |
| Design structure by turning a 90 degree corner and sloping the ends. This layout resembles a stretched pyramid. |
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| Double Strength Glass |
| (DSB) 1/8" thickness. |
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| Double-Acting Door |
| A door equipped with hardware that permits it to swing in both directions from the plane of its frame. |
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| Double-Hung Window |
| A window consisting of two sashes operating in a rectangular frame, in which both the upper and lower halves can be slid up and down. A counterbalance mechanism usually holds the sash in place. |
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| Double-Strength Glass |
| Sheet glass between 0.115" and 0.133" (33.38 mm) thick. |
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| Drip Channel (Drip Trough) |
| a metal channel that is designed to prevent water running down the door from dripping onto the floor when the door is opened. |
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| Drip Mold |
| An exterior molding (extrusion or brake shape) contoured for controlling or deflecting dripping water. |
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| Dry Glazing |
| A method of securing glass in a window frame with a dry, preformed, resilient gasket, without the use of a glazing compound. |
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| Dual Action Window |
| A window in which the operating vent tilts in from the top for ventilation and swings in from the side for glass cleaning. Each window has one handle to perform both operations. Also called a tilt-turn window. |
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| Dual Durometer |
| A material that has two or more levels of flexibility. |
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| Dual Durometer Bead |
| A vinyl glazing bead with a softer flap against glass and a harder section inserted into the sash member. |
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| Dual Glazed |
| Two single lites glazed into a split sash with an airspace, not hermetically sealed, between the two single lites. |
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| Dual Sealed Insulating Glass |
| A superior insulating glass unit (IGU) which greatly resists seal failure (internal moisture accumulation). It is made by combining two glass lites, an air spacer, a primary seal, e.g., Polyisobutylene (PIB), for resistance to Moisture Vapor Transmission (MVT), and a secondary seal, e.g., silicone, for adhesive strength. |
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| Dual Weather Seals |
| A pair of gaskets, running the length of a glazed system, one towards the exterior and one towards the interior, acting as twice the barrier protection of a single weather seal. |
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| Dual Window |
| Two windows joined together, one in front of the other, to provide sound control. |
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| Durometer |
| An instrument with a blunt probe used to measure the hardness of elastomeric glazing gaskets and setting blocks on a scale of 0 to 100. Also see Shore A. |
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