What is the term for a strip fastened to the floor beneath a door, typically covering a joint where two types of floor materials meet?

The term for a strip fastened to the floor beneath a door, typically covering a joint where two types of floor materials meet, is known as a threshold. A threshold serves several purposes, including providing a smooth transition between different flooring types and preventing drafts or moisture from entering through the bottom of the door. It is an essential element in doorways that not only enhances aesthetics but also improves functionality by seamlessly joining two distinct flooring surfaces.

Baseboards are the trim that runs along the bottom of a wall and do not serve the same function as a threshold. A jamb refers to the vertical portion of a frame that surrounds a door or window, while a transom is a horizontal structural element typically located above a door or window, often used to allow light or ventilation. These terms highlight different components of construction that do not pertain to the specific task of bridging different flooring types, further emphasizing the importance of the threshold in this context.