What is the strip between doorways?

Author: Kayley Langosh  |  Last update: Saturday, April 4, 2026

Also referred to as door bars or door threshold strips, there are a variety of different types of interior door thresholds but ultimately they are all used to bridge the gap between rooms or different types of flooring, creating a smooth, stylish transition.

What is the strip between doors called?

Mullion. A mullion resembles a stile. It is the vertical component that separates two panels located in the middle of the door between the rails.

What is the space between two doorways called?

In contemporary usage, a vestibule constitutes an area surrounding the exterior door. It acts as an antechamber between the exterior and the interior structure. Often it connects the doorway to a lobby or hallway.

What is the divider between doors called?

Mullion. A mullion is a vertical or horizontal divider between sections of the door. This is often used to separate glass panels or other decorative elements within the door. It provides structural support and stability.

Where does the transition strip go in Doorway?

The rail should sit between the two door jambs at the narrowest spot in the doorway. If your flooring is already installed and you are adding a transition strip, there is a little more to do. To prepare your subfloor, you will need a few supplies: Dremel saw or multi tool.

How to Install Transitions for Hardwood Flooring (Reducer, Threshold, T-Mold) | LL Flooring

What does a transition strip look like?

Usually called seam binders, these wide (about 5 inches) transition strips are flat strips of hardwood with beveled edges, used to bridge two wood floors of equal heights.

Where does a threshold strip go?

When positioning a threshold bar, you need to make sure that you place it directly below the door, with measurements carefully made, as you don't want to see the strip when your door is closed.

What is the bar between doors called?

The Answer is a Mullion

When it comes to double doors, the metal bar running vertically between them is called a mullion. This term is commonly used in the door industry, and it refers to a vertical or horizontal element that separates and supports panes of glass, as well as sections of metal or wood.

What are the metal strips in doorways called?

Door thresholds (also known as door bars) are a necessity for all homes, lending stylish touches as well as adding a range of energy efficiency and safety benefits.

What does a mullion look like?

Mullions are horizontal or vertical bars that visually divide a window into smaller sections, creating a grid-like pattern. Not only do mullions enhance the aesthetics of your windows, but they can also serve functional purposes such as allowing for different types of glass configurations.

What is the thing between two doors?

The more common removable mullion (the hardware type) sits behind the meeting stiles of a pair of doors, and allows two rim panic devices to latch into it. Less common is a mullion made from hollow metal frame material, with brackets that allow it to be removed when the entire width of the door opening is needed.

What is a doorway without a door called?

Instead ofusing traditional doorways with physical doors (and there certainly are places where this is called for), a cased or archway opening can provide much wider access than traditional doorways yet still indicate a separation of living space in a home.

What is the room called when you first walk into a house?

A foyer is the space you step into as you enter your home through the front door. Think of a foyer as a lobby or landing space when you walk through the front entryway of a home. It's the transition from outdoors to indoors.

What is the space between doors called?

A vestibule is an enclosed area between the outside door of a building and the inside door.

What is an Astragal strip?

Basically, an astragal strip is that molding or strip you find on the edge of double doors. It seals the gap between them, keeping out drafts, noise, and even unwanted critters. This simple addition can boost your home's comfort and efficiency, making it a must-have for many homeowners.

What is a door threshold strip?

Also referred to as door bars or door threshold strips, there are a variety of different types of interior door thresholds but ultimately they are all used to bridge the gap between rooms or different types of flooring, creating a smooth, stylish transition.

What is a door edge strip?

However, door edge protectors (also known as door edge strips or door edge guards) offer a much simpler and cost-effective solution. The purpose of a door edge protection is to mitigate or completely eliminate any kind of damage that a door edge may be susceptible to.

What is a threshold bar?

Thresholds, t-bars & door reducers are perfect for covering up those gaps between carpets and rooms and to give your floors a seamless finish. Not only that, door bars help keep everything in place, so you don't need to re-lay your carpet over time.

What is door strip?

A door weathering strip, also known as a door weatherstripping or door seal, is a component installed around the edges of a door to provide a barrier against air, water, noise, and other elements from entering or exiting the space when the door is closed.

What is the bar between door knobs called?

A spindle is a length of square rod or bar, made from metal, usually steel, which connects two Door Handles or Door Knobs together on either side of a door. The spindle locates into the square holes found at the back of a set of door handles or door knobs.

What is the difference between a mullion and an Astragal?

An astragal is a piece of hardware that is used on a pair of doors to seal the gap between the doors when they are closed. Astragals are different from a mullion because the astragal is fastened to the door itself. A mullion is attached to the frame and the doors stop against it.

What is the difference between a jamb and a sill?

Jambs are the main vertical parts forming the sides of a window frame. A sill is the main horizontal part forming the bottom of the frame of a window.

Do interior doors need thresholds?

While an interior door ensures a snug fit of the door leaf within the frame, a threshold acts as a structural detail that encapsulates its perimeter. Thresholds are essential to: Isolate rooms from noise (or alternatively, a rubber seal can be installed). Maintain desired temperatures within rooms.

Previous article
How can I naturally purify my well water?
Next article
How many coats of polyurethane on an exterior door?