Know the Window
This window has two movable sash that slide up and down independently.
What is a double-hung window?
The topmost component of the window or door frame, where the sash seats.
What is the head jamb?
The horizontal member of a window sash or door panel.
What is a rail?
Two or more hermetically sealed pieces of glass with space between them.
What is insulating glass?
A thin strip used to straighten jambs or level a window or door frame.
What is a shim?
Hinged at the top, this window swings outward from the bottom with a crank.
What is an awning window?
The left and right sides of the window frame.
What are the side jambs?
The vertical-edge framing component of a window sash.
What is a stile?
This textured glass provides privacy, light diffusion, or decoration.
What is obscure glass?
The opening in the wall where the window or door will be installed.
What is the rough opening?
Hinged at the top and bottom, this window opens with a crank.
What is a casement window?
The bottom framing member of the rough opening.
What is the rough sill?
The hardware piece where the sash lock engages.
What is the keeper?
This safety glass is strengthened by reheating and sudden cooling.
What is tempered glass?
This installation term means perfectly vertical.
What is plumb?
This non-operating window is glazed directly into a frame that is integral to the structure.
What is a direct-set window?
This thin strip separates and secures two sash and creates channels for movement.
What is the parting stop?
The handle attached to a rail and used to raise or lower a double-hung or gliding sash.
What is a sash lift?
This safety glass uses a plastic inner layer to hold broken glass pieces together.
What is laminated glass?
This bent aluminum piece at the exterior head blocks water from entering the gap above a unit.
What is a drip cap?
Unlike a double-hung, this style has an upper sash that does not operate.
What is a single-hung window?
This is the horizontal structural framing component at the top of the rough opening—not part of the window frame.
What is the header?
These horizontal middle rails meet and lock when a double-hung window closes.
What are the check rails, also called meeting rails?
This coating passes most visible light but reflects heat energy toward its source.
What is Low-E?
This replacement method removes the entire old window before installing the new unit.
What is a full-frame window?