Double-Hung Window

Related terms

• Sash

  The framed, often movable panel that holds the glass within a window. Double-hung windows have an upper and lower sash.

• Double-Pane / Double-Glazed

  A two-pane insulated glass unit, the modern baseline for energy-efficient windows.

• Door Sweep

  A seal along the bottom edge of a door that closes the gap to the threshold against drafts, water, and pests.

• Dutch Door

  A door split horizontally so the top and bottom open independently.

• Door Jamb

  The frame the door is mounted in — two side jambs and a head jamb. Must be plumb and square for the door to operate and seal.

• Egress Code Requirement

  IRC minimums for an emergency escape opening — clear width, height, area (about 5.7 sq ft), and max sill height — that govern bedroom/bas…

• Door Closer

  A device that controls a door's closing speed and ensures it latches, common on garage-to-house fire-rated doors.

• Egress Window

  A window meeting code minimum size and sill height to serve as an emergency exit, required for bedrooms and finished basements.