Double-Pane / Double-Glazed

Related terms

• Insulated Glass Unit (IGU)

  Two or more glass panes sealed with a spacer and gas fill to reduce heat transfer. The standard energy-efficient window glazing.

• Dutch Door

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

• Double-Hung Window

  A window with two operable sashes that both slide vertically and usually tilt in for cleaning. The most common residential window in olde…

• 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 Sweep

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

• Egress Window

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

• 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.

• ENERGY STAR (Windows)

  The EPA program certifying windows that meet regional efficiency criteria; the simplest shortcut to a climate-appropriate efficient window.