ADA Door Clearance

Related terms

• Threshold

  The bottom member of an exterior door opening, often adjustable, that works with the door bottom and sweep to seal out water and air.

• Threshold (Floor)

  The transition member at a doorway between two flooring types or rooms.

• Air Leakage (AL)

  The rate of air infiltration through a window assembly; lower is tighter and more efficient.

• Aluminum Window

  A strong, slim-profile metal-framed window; without a thermal break it conducts heat and is less efficient, so used mainly in warm climat…

• Apron

  The trim piece applied to the wall beneath the interior window sill (stool), finishing the assembly.

• Argon / Krypton Fill

  Inert gas sealed between glass panes; denser than air, it slows heat transfer. Krypton outperforms argon in thinner triple-pane cavities.

• Astragal

  The vertical molding/seal where a pair of doors meets, closing the gap and providing a stop and weather seal.

• Awning Window

  A window hinged at the top that swings out from the bottom, shedding rain so it can stay open in light weather. Often used high on walls…