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GLOSSARY
 
A     B     C     D     E     F     G     H     I     J     K     L     M     N     O     P     R     S     T     U     V     W
 


     
 
A
 
     
 
 
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Air Infiltration:
Air that passes between a window sash and frame.

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Argon Fill:
A clear, odorless and non-toxic inert gas that reduces the thermal conductivity of the airspace between the glass layers.

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Awning Window:
A window unit that is hinged on the top, in which the bottom sash swings outward for ventilation.

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B
 
     
 
 
• 
Bay window:
An angular, multi-panel window, usually made up of a large center fixed unit and two flanking units, projecting out from the wall of the home. The three window unit usually projects at 9, 15, 30, or 45 degree angles to the wall.

• 
Bow window:
A composite of three or more window units joined together in a radial formation.

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C
 
     
 
 
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Cam lock and Keeper:
The mechanisms which pull the sash together when placed in the locked position.

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Caming:
Metal separator that holds individual pieces of decorative glass in place. Caming is typically brass with a variety of decorative finishes.

• 
Casement Window:
A window that is attached to the frame by side hinges and cranks outward for ventilation to the right or left.

• 
Condensation:

The deposit of water vapor from the air on any cold surface whose temperature is below the dew point, such as a cold glass or frame that is exposed to humid air. Condensation also occurs when there is excessive humidity in the home.

• 
Conduction:
Energy transfer from one material to another by direct contact.

• 
Constant Force Balance System:

A modular design of pre-stressed flat stainless steel formed into a coil, providing a smoother, quieter operation of the window. The energy of the balance system remains constant through every point of travel when the window sashes are raised and lowered.

• 
Convection:
When warm air meets cool air, a circulatory draft can occur.

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D
 
     
 
 
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Desiccant:
An extremely porous substance used to absorb moisture and sustain dryness (desiccation) from within a sealed air space of an insulating glass unit.

• 
Double Hung Window:
A window unit that has two operable sashes which move vertically in the frame.

• 
Double-strength glass:
Glass with an approximate thickness of 1/8”.

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E
 
     
 
 
• 
Extruded Screen Frame:
This frame is pressed through a die and is extruded for quality and strength.

• 
Extrusion:
A form produced by forcing vinyl through a die.

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F
 
     
 
 
• 
Frame:
The material in which window sashes or door panels are mounted.

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Foam Injected:
The hollows inside the vinyl master frame are injected with polyurethane foam.

• 
Fusion-welded:
The process that uses extreme heat and joins vinyl window materials together into one piece.

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G
 
     
 
 
• 
Glass:
An inorganic transparent material composed of silica (sand), sodium bicarbonate (soda), and calcium carbonate (lime) with small quantities of alumina, boric or magnesia oxides.

• 
Glazing:
The process of sealing a piece of glass into a window.

• 
Glazing bead:
A plastic strip applied to the window sash around the perimeter of the glass.

• 
Grids(Grills):
Decorative horizontal or vertical bars installed between the glass panes to create the appearance of the sash being divided into smaller lites of glass.

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H
 
     
 
 
• 
Head:
The horizontal top portion of the main frame.

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Hopper Window:
A window unit that is hinged on the bottom in which the top of the sash swings inward.

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I
 
     
 
 
• 
Insulating Glass Unit (IG):
Two or more panes of glass separated by a spacer with a hermetically sealed air space.

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J
 
     
 
 
• 
J-channel:
Integrated extension on the outside of a new construction window for installation applications.

• 
Jamb:
The vertical members at the sides of a window frame.

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K
 
     
 
 
• 
Keeper Rail:
The horizontal portion of the sash where the lock keeper is attached.

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L
 
     
 
 
• 
Lift Rail:
Extruded on the horizontal rails of the top and bottom sashes, it is used for raising and lowering the sashes.

• 
Low E (Emissivity) Glass:
Microscopic layers of silver and titanium dioxide, which dramatically increase thermal performance and restrict the passage of radiant heat.

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M
 
     
 
 
• 
Meeting Rail:
The part of a double hung window where the two panels meet and create a weather barrier.

• 
Mullion:
A component used for connecting multiple units together.

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O
 
     
 
 
• 
Obscure glass:
Any textured glass (frosted, diffusion, pebble, etc.) used for privacy, light diffusion, or decorative effects.

• 
Operator:
Crank-operated device used for opening and closing casement and awning windows.

• 
Oriel Window:
Window that features the meeting rail off center of the frame, usually a 1/3, 2/3 ratio.

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P
 
     
 
 
• 
Picture Window:
A stationary window that is non venting.

• 
Polyvinylchloride (PVC):
An extruded or molded vinyl polymer material used in window fabrication and as a thermal barrier for aluminum windows.

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R
 
     
 
 
• 
R-value:
A measure of the resistance to thermal transfer or heat flow. A higher R-value window has a greater resistance to heat flow and a higher insulating value.

• 
Rough opening:
The opening in a wall into which a window or door unit is to be installed.

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S
 
     
 
 
• 
Sash:
An assembly of stiles and rails made into a frame for holding glass.

• 
Sashlite® Technology:
A revolutionary spacer system that integrates the spacer system directly into the sash profile.

• 
Sidelites:
Glass decorative panels placed next to a door for ornamentation and to allow light to pass through.

• 
Sliding Window:
A window that opens and closes horizontally. It is offered in both two and three lite configurations.

• 
Solar heat gain coefficient (SHGC):
Measures how well a window blocks heat from sunlight. The SHGC is the fraction of the heat from the sun that enters through a window. SHGC is expressed as a number between 0 and 1. The lower a window''s SHGC, the less solar heat it transmits.

• 
Sweep:
The weatherseal on the bottom of the door that makes contact with the threshold, that helps to eliminate drafts, leaks, and ice buildup.

• 
Swing:
Describes a door system which opens either in (toward the home) or out (away from the home), when in operation.

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T
 
     
 
 
• 
Tempered glass:
Glass that is strengthened through the process of heating and cooling the surface rapidly. This process allows the glass to withstand greater than normal forces on its surface. When it breaks, it shatters into small pieces to reduce hazard. Tempered glass is standard on all Entry Doors and Sidelights.

• 
Thermal break:
The addition of a thermal insulating material between two thermally conductive materials.

• 
Tilt latch:
A mechanism that when depressed allows the sash to tilt-in from the frame for easy cleaning.

• 
Transom Window:
A window that fits over the top of a door or other window.

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U
 
     
 
 
• 
U-value:
Thermal conductivity (or the U-Factor) is the property of a material that indicates its ability to conduct heat. The lower the U-value, the better the insulating value.

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V
 
     
 
 
• 
Vinyl:
Polyvinyl chloride material, used for window frames and fabrication.

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Visible Light Transmittance:
A measure of the amount of visible light that passes through the glazing area of a window.

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W
 
     
 
 
• 
Weatherstripping:
A strip of material used to seal the joint between the window sash and frame. Also used with our Entry Doors, the flexible material surrounding the door to protect your home from air infiltration.

• 
Windload:
Force exerted on a surface by the movement of air.

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Related Topics:
 
     
FAQs
 
  What is condensation? Wondered about Low-E Glass? These questions and more are answered in this Frequently Asked Questions section...[more]



 
Door Types
 
  Your entry door is the focal point of your home. We provide a wide range of door styles and glass designs. Whether its steel, fiberglass, or textured steel, you're sure to find a style to compliment your home...[more]




     
 
     
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