Are you considering installing new bifold doors in your home? If you are, we understand why. Their space-saving configuration is not only highly functional but also versatile enough to fit in closets, pantries, laundry areas, and bathrooms. They can even be an elegant room divider, like this Mary bifold door.
Whether you’re looking to replace an old door or install a bifold door in your new home, understanding bifold door sizes is the first step for completing this project successfully. To ensure a clean installation, taking correct measurements is the key. Keep reading to learn all the information you need to install your brand-new bifold doors.
Table of Contents
Bifold Door Sizes Explained
Standard Bifold Door Heights
Standard Bifold Door Widths
Common Closet Bifold Door Sizes
How to Measure for Bifold Doors
Measure the Width of the Opening
Measure the Height of the Opening
Check for Level, Plumb, and Clearance
Rough Opening vs. Actual Bifold Door Size
Why Bifold Doors Are Slightly Smaller Than the Opening
How Much Clearance Do Bifold Doors Need?
When to Choose Custom Bifold Doors
What to Consider Before Ordering Custom Sizes
Final Thoughts
Frequently Asked Questions
Bifold Door Sizes Explained
First, we’re going to discuss the most basic and most important information: standard height and width, and common bifold door sizes. By understanding this data, you’ll learn how to measure everything correctly.
Standard Bifold Door Heights
Standard door sizes make doors readily available, interchangeable, and compatible with conventional frames and hardware. The most commonly used standard door height, for both single and double interior bifold doors, is 80 inches. This is a typical height found in most homes.
There are also taller options available. 84-inch bifold doors are used in homes featuring taller ceilings, and 94-inch doors are standard in newer homes, especially in custom construction and luxury residences.
Standard Bifold Door Widths
Standard bifold door widths are manufactured widths designed to fit typical residential door openings.
The most common widths are 24, 30, 32, and 36 inches, and they are used for single bifold doors.
For wider openings, double- or multi-panel bifold doors are used, with typical widths of 48, 60, 64, and 72 inches.
These standard door widths are compatible with an 80-inch standard height.
Common Closet Bifold Door Sizes
Closets and similar storage areas are where bifold doors are most commonly used, specifically because of their configuration. This is because closets are usually located in tight spaces. For those needing a single bifold door, you’ll typically find sizes ranging from 24 to 36 inches. In larger closets that need wider, usually double bifold doors, the width ranges from 48 to 72 inches.
How to Measure for Bifold Doors
Before taking measurements for bifold door installation, make sure that flooring, trim, and drywall are fully finished. If you’re replacing an existing door, don’t rely on the old door size; measure the opening to ensure you have the correct information. Round up the measurements to the nearest ⅛ inch and compare your measurements with the manufacturer’s recommended opening dimensions, as installation clearances can vary slightly. If you’re installing bifold doors in a shallow closet or pantry, check if there is enough interior depth for the folded panels and track hardware.
Measure the Width of the Opening
To ensure you have correct measurements, it’s crucial that you take them at three points: the top, middle, and bottom of the opening. Always measure from the inside of the edge of one finished jamb to the inside edge of the opposite jamb.
Always use the smallest measurement because if the widths differ, the narrowest measurement will help ensure the door fits properly.
Measure the Height of the Opening
As with width, measure the height at its shortest point to ensure the bifold door fits the opening correctly.
Place the end of the tape measure on the finished floor and extend it to the underside of the finished header. Take measurements like this at the center of the opening, as well as on the right and left sides.
Check for Level, Plumb, and Clearance
Another important step between measurements and installation is to check whether everything is leveled and plumb. While most bifold doors have adjustable pivot hardware, it only allows minor adjustments in height and alignment. An uneven floor can cause the door to hang unevenly. It will lead to gaps between panels or even cause them to rub against the floor.
If the frame is out-of-square, the panels may not fold properly, meaning the door will not open or close correctly. By taking measurements at three points for width and height, you will check if it’s, in fact, fully square or not.
It’s better if there is no trim, casing, or molding directly around the opening; otherwise, it can interfere with the doors when they’re open. There should always be adequate clearance around the opening to ensure panels and hardware don’t catch onto anything.
Rough Opening vs. Actual Bifold Door Size
To avoid installation mistakes many make, let’s distinguish between the finished opening, rough opening, and actual door size.
Finished opening is the opening after flooring, trim, and drywall have been fully completed.
Rough opening is the framed opening before finish materials such as drywall are installed. It needs to be large enough to fit the frame and the shims and allow installation adjustments.
Actual door size represents the physical dimension of the door itself. While the nominal size is the dimension of the door slab and the approximate measurements by which the doors are sold, the actual door size is smaller to ensure clearance for smooth operation.
Why Bifold Doors Are Slightly Smaller Than the Opening
There are several reasons why bifold doors are slightly smaller than the opening. The opening needs to accommodate the top track and guide, pivot brackets, and the rest of the hardware. It also needs to provide enough room for installation adjustments such as adjusting pivot hardware and adding shims to align the doors if the opening isn’t plumb.
A small clearance around the opening allows the door to operate smoothly and prevents the panels from rubbing against the frame or the floor when opening and closing. One more thing to keep in mind is that wood and other door materials expand and contract with changes in temperature and humidity. By having a small gap around the doors, we prevent them from sticking over time.
How Much Clearance Do Bifold Doors Need?
While the exact clearance varies by manufacturer, and we recommend checking it, there are some common guidelines to ensure smooth and proper operation.
At the bottom, it’s best to leave a gap between ⅜ and ½ inches to prevent rubbing on the floor or carpet.
For the top gap, an ⅛ to ¼-inch gap allows the door to move freely in the top track.
Each side should have an ⅛-inch gap to prevent binding against the jamb.
It’s important to note that there should always be gaps between door panels; ⅛ to ¼-inch gaps allow the hinges to fold without rubbing.
Bifold doors don’t require the same swing radius as traditional swing doors do; however, there should be at least 24 to 30 inches of clear floor space in front of the opening to ensure the doors open freely.
When to Choose Custom Bifold Doors
There are several situations when it’s necessary to order custom bifold doors. For one, if the opening isn’t standard size, either it’s wider or taller than standard-size bifold doors. This usually happens in older homes.
If you want a specific design or a specific material that is not available in stock doors. Standard bifold doors are most often made of MDF or hollow core, so if you wish to have them made of solid wood, moisture-resistant material, premium hardwood, with specialty finishes, paint colors, or unique veneers, custom-made is the way to go.
To match existing architecture in historic homes and preserve historic proportions and custom stain colors, custom-made doors can replicate this. Or you simply wish for higher-quality bifold doors with better hardware, more durable construction, and a longer service life, custom-made doors can offer.
What to Consider Before Ordering Custom Sizes
To ensure you end up with a perfect end product, there are several things to consider before ordering custom-sized bifold doors. Measure everything several times if necessary to ensure you have the right information. Check with the manufacturer what measurements they require - rough opening size or finished opening size; ordering from the wrong measurement can result in a door that does not fit.
Confirm the manufacturer's lead time and return policies. Check out different materials and finishes and make sure you’ve chosen the right ones for the environment where you intend to install the bifold doors.
Final Thoughts
Bifold doors can be a highly practical and aesthetically pleasing solution, whether you intend to use them as a door for a closet, pantry, or laundry room, or as a functional divider between different living spaces. While standard sizes work for many homes, sometimes custom doors are a better choice. Take into consideration whether you’re replacing an existing bifold door, renovating a room, or planning new construction.
It's important to take accurate measurements and understand the terminology so you can order doors that fit the space perfectly, operate smoothly, and last for years to come. Investing a little bit more time in planning can save significant time, money, and frustration during installation. By knowing your options and choosing the right door, you’ll get to enjoy them fully.
Frequently Asked Questions
What Bifold Door Sizes Fit Standard Openings?
Most homes are framed to accommodate standard door sizes, and the same goes for bifold doors. Standard bifold door sizes are available at home improvement stores from most door manufacturers, ranging from 24 to 72 inches. Bifold doors correspond to these sizes, and are sold by their nominal size: 24, 30, or 36 inches for single doors, and two 24, two 30, or two 36-inch panels for double doors.
What Size Bifold Doors Do I Need for a 48-inch Opening?
For a 48-inch opening, you will need a 48-inch bifold door. Because of their configuration, this actually means that it comes as two 24-inch-wide bifold doors, consisting of 4 panels in total. Each bifold unit contains two hinged panels.
Why Are Bifold Doors No Longer Popular?
While bifold doors are still widely used as a practical choice for closets, pantries, and laundry rooms, they’ve become slightly less popular simply because design trends and homeowner preferences have shifted. They might be less common in high-end custom homes, but they are definitely not considered outdated, especially with those homeowners who prioritize functionality.
