Glass bifold doors offer a lot of benefits, such as elegance and style, excellent natural light, energy efficiency, and integration of inside and outside. This makes them an ideal choice for many people. Carefully installed bifold exterior doors are not only aesthetically pleasing, they also enhance the overall experience and are invariably satisfying.

Accurate measurements are essential for a successful installation. This page can help with size measurements, but it's best to get professional help when buying and installing bifold doors for the best results.

1. Preparing the measurement area

A. Ensure that the door opening is clean and unobstructed

Before measuring, it is important to thoroughly clean the door area to ensure accurate measurements. Remove any debris, dust, or dirt that may interfere with the measuring process. Additionally, make sure there are no obstacles blocking access to the door, such as furniture or clutter. 

Creating a clear and unobstructed space around the door will help the measurement process run smoothly and efficiently. Consider the environment and reduce disturbances like noise or distractions that could impact measurement accuracy. By taking these steps, you can ensure that you get precise and reliable measurements for your door project.

B. Clearly marking the four corners of the doorway

Before taking measurements, the four corners of the opening need to be marked very clearly. These can be marked on the wall with pencil, paint or stickers. Clearly marking the corners will help you to position yourself accurately when taking subsequent measurements and ensure that the measurements reflect the dimensions of the entire opening, not just a portion of it.

2. How to Measure for Bifold Doors – 3 Simple Steps

Step 1: Check that the door opening is level

Use a tape measure to check the diagonals of the door opening. If the diagonal measurements are equal or have minimal difference, the door opening is level. If the door opening is tilted or uneven, adjustments are required before proceeding with further detailed measurements.

Step 2: Measure the height of the door opening

Measure the height of the doorway at least three times along its length (left, center, right), at intervals of about 500 mm. Compare the three measurements and select the minimum value. This ensures that the chosen bi-fold door fits perfectly into the opening, even if the opening is slightly uneven.

Step 3: Measure the width of the door opening

The next step is to measure the width of the doorway. Again, measure the width at least three times along the length of the doorway (bottom, middle, and top), at intervals of approximately 500 mm. Carefully compare the three width measurements and, if they are not exactly the same, take the minimum value.

NOTE: Subtract 0.5 inches from the minimum value （both height and width）to determine the required door size, allowing for proper fit in the opening.

Provide the supplier with the actual measured minimum width and height dimensions of the door opening. Ensure that the door size provided by the supplier matches your measurements exactly. If there are any changes, make sure to talk to the supplier so they can make a bifold door that fits your needs.

Bifold doors can improve how your living space looks and works, but you need to measure accurately for them to work well. Follow the steps in this guide to easily install bifold doors and transform your home.

If you need help with custom size bifold doors or want to know more about TOPBRIGHT's aluminum bifold doors, our experts can assist you. Our experts are available to help you. Just reach out to us for assistance. Contact us today at (313) 558-7555, email project@cntopbright.com, or fill out our online form, and let us help you bring your vision to life.