Making Sense of Window Types And Terminology
A single sash window that opens out from the bottom.
Three or more windows, typically with a larger unit in the centre, mulled together on a 30 or 45 degree angle, projecting out from the exterior wall.
Four or more windows mulled together on a 10 or 15 degree angle, projecting out from the exterior wall.
A window with a hinged sash that swings out like a door.
A window made of two movable sashes that slide up and down and tilt in.
A window made of two movable sashes that slide horizontally.
Fixed Sash Window
Non-venting or non-opening window.
Panoramic Picture Window
Non-venting or non-opening window with a slim frame profile.
A window made of one sash at the bottom that slides up and down and tilts in with one fixed sash at the top.
A window made of one movable sash that slides horizontally and one fixed sash.
Products that fill openings in a building envelope, including windows, doors, skylights, and curtain walls designed to permit the passage of air, light, vehicles or people.
A colourless, odourless inert gas injected between panes of glass to reduce thermal transfer
The trim around a window that adds a unifying design element regardless of the type of window
Exposed molding around the window that covers the interior and exterior edge of the frame and rough opening.
A window large enough and low enough for exit in case of an emergency. Building codes apply.
Two panes of glass spaced apart and sealed to form a complete glazed unit with an air space.
Indicates the rate of heat transfer.The lower the number, the slower it transfers heat from a warm area to a cold area.
Indicates the resistance to heat transfer. The higher the number, the more insulative it is.
Solar Heat Gain Coefficient
The (SHGC) indicates the amount of solar gain through a window. The higher the number, the better the solar gain.
Calculated using a formula that balances a product’s U-value with it’s potential solar gain coefficient and it’s airtightness. The higher the ER number, the better the product’s thermal performance.
Casement handle that folds down on itself to create a smooth aesthetic with less interference to window treatments.
A strip of material used to create a seal.
A multi-pane effect created by placing decorative bars within the airspace between panes of glass.
Simuated Divided Lites
A multi-pane effect created by surface mounting decorative bars.
Layers deposited on a window glazing surface primarily to reduce the U-factor by suppressing the passage of radiant heat.
A horizontal or vertical structural member which combines adjacent window units.
Interior or exterior casing to cover the mullion joint.
Use of single glass panes in a window.