Today’s entry doors are more than just doors — they are complete systems built with technology designed to give you years of problem-free performance and enhanced curb appeal. To help you understand how your door functions, here are the key components of an entry door system.

1. Decorative Glass
A glass option inside the door panel, sidelight, or transom.
 
2. Frame
The framework that surrounds and supports the entire door system.
 
3. Insulated Foam Core
An insulation material inside the door panel that contributes to the door's energy efficiency (not applicable to wood doors).
 
4. Panel
The door that swings open and closed.
 
5. Sidelights
The fixed panels and glass that are attached on either side of the door frame.
 
6. Sill
The bottom of the frame that rests on the floor.

7. Transom
The fixed glass panel that is installed above the door.