Before you ever start looking at new garage doors, be sure of the proper size garage door you need. Fortunately, measuring your garage door can be a quick, easy process with the right approach.
Before you start, you’ll need to be prepared with some basic materials. You’ll want a tape measure to get the actual measurements, a step ladder for easy access to all areas, and a pen and paper to write it all down.
Now you’re ready to actually measure the garage door.
Start by measuring the width of the door. For this measurement, you want to make sure you record the width at its widest point. You will measure from the middle of the left side of the finished opening directly across to the right side. Measure in feet and inches. It may be difficult for you to stretch a tape measure all the way across by yourself, so get assistance or use a digital tape measure.
Once you’ve got the width, the next step is to measure the height, also in feet and inches. Again, you want the highest possible point. Make sure the floor is level and the top of the finished opening is as well. Measure from the garage door floor to the top of the finished opening.
Now you need to know how much room you have between the door opening and the ends of the garage. Measure the width from the opening on either side to the end of the garage on that side. You’ll need up to 3.75 inches on each side to install vertical track. For a double car garage door, you need a center post at least 10 inches wide.
You’re almost done. Next, you’ll need to measure the distance from the top of the door opening to the ceiling. You’ll need a stepladder for this part. This area is known as the headroom, and it is important because the garage door will need to roll up on tracks through this area.
Finally, you’ll need to measure the distance from the garage door opening to the back of the garage. This is called the backroom, and it is also critical because this is the area where your garage door will retract when open. If you have a sectional door, you’ll need the amount of the door height plus 15 inches for manual lift doors or 18 inches for doors that retract with an electric garage door opener.