Unlocking the full potential of your living space is a goal shared by many homeowners. With their ability to create expansive openings, bifold doors have become a sought-after addition to contemporary homes as pantry and closet doors as well as for connecting indoor-outdoor spaces among other uses. However, selecting the right bifold door size is crucial to ensure a perfect fit and maximize the benefits they offer. In this comprehensive guide, we will take you on a journey through the world of bifold doors, exploring their design considerations, and most importantly, demystifying the intricate task of determining the ideal bifold door sizes for your unique space. Whether you are a homeowner embarking on a renovation project or an architect seeking professional insights, this article will equip you with the knowledge you need to make informed decisions and create an inviting, harmonious, and functional space with bi-fold doors.

Standard Size(ft')  
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15ft 16ft 17ft 18ft 19ft
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25ft 26ft 27ft 28ft 29ft
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How to Size Your Wall Opening Accurately?

Accurately sizing the wall opening for bifold doors is essential to ensure a seamless installation and optimal functionality. To begin, measure the width of the opening at three different points, taking note of the smallest measurement. Next, measure the height from the floor to the top of the opening, considering any flooring variations. Deduct approximately 10-12mm from both the width and height measurements to allow for smooth operation and clearance.

Bi-fold doors are typically available in standard sizes. When working with an even number of doors, it is recommended to ensure that each individual door leaf is a minimum of 28 inches wide. Conversely, when working with an odd number of doors, each door should have a width of at least 16 inches. It is important to note that the common height for bi-fold doors is typically 80 inches. These standard sizes can be readily found at various hardware stores, providing convenient options for homeowners seeking to incorporate bi-fold doors into their living spaces.

  1. 2’0’’ x  6’8’’ Bi-fold – Two 12’’ Panels
  2. 2’6’’ x  6’8’’ Bi-fold – Two 15’’ Panels
  • 2’8’’ x 6’8’’ Bi-fold – Two 16’’ Panels
  1. 3’0’’ x 6’8’’ Bi-fold – Two 18’’ Panels
  2. 4’0’’ x 6’8’’ Bi-fold – Four 12’’ Panels
  3. 5’0’’ x 6’8’’ Bi-fold – Four 15’’ Panels
  • 6’0’’ x 6’8’’ Bi-fold – Four 18’’ Panels

It is crucial to consider structural supports, electrical outlets, and any obstructions that may affect the door's installation. Taking precise measurements, preferably using a spirit level, and accounting for necessary adjustments will result in a perfectly sized wall opening for your bifold doors, guaranteeing a flawless integration into your space.

Bi-fold Doors with Jambs.

When measuring for bi-fold doors with jambs, you have to measure either a bigger door opening than the size of the bi-fold door itself or measure a smaller door than the existing door opening. Measure the width and height of the rough opening, accounting for any finishes such as drywall. For the width, subtract 1 inch from the rough opening to allow for jamb installation. When measuring the height, consider the header and floor clearance. Subtract 1/2 inch from the height measurement for proper clearance. Additionally, ensure the opening is plumb and square.

 How do Bi-fold Doors Work?

Bifold doors operate on a simple yet ingenious mechanism that allows them to smoothly fold and stack to the side, creating a wide opening between indoor and outdoor spaces. The door panels are hinged together, with each panel connected to a track system at the top and bottom. When the door is opened, the panels fold inward or outward, guided by the tracks, until they stack neatly to one side. This folding action is achieved through the use of pivot pins and hinges, allowing the door to glide effortlessly along the track system. Bifold doors offer versatility, as they can be partially opened for ventilation or fully opened to seamlessly connect spaces and create an expansive, unobstructed view.

 What Size Should a Bi-fold Door be to Fit Correctly in the Opening?

The size of a bi-fold door depends on many factors. Regardless of the design considerations of your bi-fold door, you must ensure that it will fit into the allocated opening. To ensure a correctly fitting bifold door in an opening, and to avoid making costly mistakes, the size must be determined accurately. Always measure the width of the opening by taking three measurements at the top, middle, and bottom. Choose the smallest measurement as the width for the door. Take measurements from the floor to the lintel on the left, middle, and right sides when measuring the height. Again, select the smallest measurement. Subtract a small clearance space for smooth operation and add it to the final width and height measurements. You may also have to make subtractions or additions accordingly depending on whether you will be having jambs. This will give you the correct size for a bifold door that fits snugly and functions flawlessly within the opening.

What is the Minimum Size for Bi-fold Doors?

The minimum size for bifold doors depends on various factors, including the manufacturer's specifications and the intended purpose of the doors. Generally, bifold doors can be customized to fit a range of sizes, but there are practical limits to consider. In terms of width, bifold doors typically start around 1.2 meters (4 feet) and can extend up to 7 meters (23 feet) or more. For height, the minimum size often ranges from 1.8 meters (6 feet) to 2.4 meters (8 feet), ensuring adequate clearance and structural integrity. It's important to consult with professionals and adhere to local building codes to determine the most appropriate minimum size for your specific bifold door installation.

 How Much Space do you Need for a Bi-fold Door?

When it comes to determining the space required for a bifold door, several factors come into play. The size of the opening, the number of panels, and the desired functionality all influence the space needed. Generally, for a single bifold door, you should allocate at least twice the width of the door panel plus a few inches for clearance. For multiple panels, the space should be divided equally between them when the doors are fully open. However, it's crucial to consult with a professional or refer to manufacturer guidelines to ensure accurate measurements and a seamless installation. Proper planning and consideration of space will ensure that your bifold door operates smoothly and enhances your living space flawlessly.


In conclusion, understanding the appropriate bifold door sizes is crucial for achieving a seamless and functional home design. By considering factors such as door opening dimensions, available space, and desired aesthetic appeal, homeowners can select the right bifold door size to enhance their living spaces. The correct measurements ensure smooth operation, prevent installation issues, and promote energy efficiency. Additionally, bifold doors offer versatile solutions for various applications, from room dividers to closet doors or patio enclosures. By following this comprehensive guide for bifold door sizes, individuals can make informed decisions and unlock the full potential of their living spaces, adding both style and functionality to their homes.

June 14, 2023 — YanJoanne