How to Measure for Custom Garage Doors

If you’re planning on adding custom garage doors to your home or project, the first thing you should consider is how to properly record measurements to ensure a picture-perfect installation. Timberlane provides quick and easy instructions to accurately measure a garage door opening to get you onto the next phase of your project.
Download Measuring Guide

begin by measuring the width of your garage door opening

Outside View

Step 1: Garage Door Opening Width

Begin by measuring the width of your garage door opening. This is the total distance between the inside edge of the right door trim to the inside edge of the left door trim.

Step 2: Garage Door Opening Height

Next, measure the height of your garage door opening. This is the total distance between the inside edge of the top door trim to the garage floor.

then measure the height of your garage door opening

Outside View

measure the gap between the side door openings and the ends of the garage space

Inside View

Step 3: Garage Door Sideroom

Next, you’ll need to measure the distance between the side door openings and the ends of the garage space. This is done by measuring from the inside edge of the right and left door trims to each sidewall.

Step 4: Garage Door Headroom

Continue by measuring the space between the top of the door opening to the ceiling or the lowest obstruction such as ceiling joists and beams.

measure the area between the top of the door opening and the ceiling

Inside View

measure the distance from the door opening to the rear of the garage

Inside View

Step 5: Garage Door Backroom

Finally, measure the distance from the door opening to the rear of the garage or nearest obstruction that would interfere with normal door operation.