DOORIX GUIDE
How to Measure for a New Garage Door: A Step-by-Step Guide
Selecting the right garage door starts with accurate measurements. Whether you're replacing an old door or installing a new one, precise measurements are crucial for a perfect fit. This comprehensive guide will walk you through each step of measuring your garage door, ensuring a smooth and successful installation.

Written By
Doorix Operation Team
Why Accurate Measurements Matter
Before diving into the measuring process, it's important to understand why precision is key:
Incorrect measurements can lead to costly mistakes
Ill-fitting doors compromise home security and insulation
Proper measurements save time and money during installation
Step 1. Measure the Width
Start by measuring the width of the garage door opening from inside the garage
Measure at the bottom, middle, and top of the opening
Record the smallest measurement to ensure a proper fit
Measure in three locations to account for any potential unevenness in the framing
Step 2. Measure the Height
Measure from the floor to the top of the opening
Take measurements on both the left and right sides of the garage
Use the smallest measurement as your standard height
Check for any obstructions like pipes or electrical lines that might impact door installation
Step 3. Check the Side Room
Measure the space on both sides of the door opening
Minimum side room required is typically 3-4 inches on each side
This space is crucial for track and spring installation
Step 4. Measure the Headroom
Measure from the top of the door opening to the ceiling
Standard garage doors require 12-18 inches of headroom
This space accommodates the door's tracking and opening mechanism
Additional Measurement Tips
Always double-check your measurements
Round down to the nearest inch for a safe fit
Consider the type of door (sectional, roll-up, etc.) when measuring
If uncertain, consult a professional measuring service