CASEMENT DOOR:

A casement is a type of window that swings open on a hinge, like a door. Open the casements in the kitchen and let the breeze come in! Before the invention of the sash window, which slides up and down, casements were very common.

FRENCH DOOR:

The elegance and appeal of French doors hinges on the fact that they are actually not one but two doors placed side by side. The hinges are placed on the outer opposite sides of the frame, with handles placed close together to allow the doors to swing open from the middle.

SLIDING DOOR:

a door that opens and closes by sliding sideways instead of by swinging on hinges. A sliding door is a type of door which opens horizontally by sliding, usually horizontal to a wall. Sliding doors can be mounted either on top of a track below or be suspended from a track above.