📐How to Measure Your Exterior Door
Accurate measurements are crucial when ordering a new iron door to guarantee a flawless fit. Our step-by-step guide makes measuring easy, helping you avoid installation issues. Whether you're replacing an existing door or installing a new one, follow these simple instructions to ensure the perfect fit for your pre-hung or slab iron door.
Tools You’ll Need:
- Measuring tape (preferably metal for precision)
- Paper and pen or phone (to note measurements)
- Ladder (if measuring a tall entryway)
- Level (to check alignment)
All doors from IronDoor.com come with a Pre-Welded Jamb ready for installation. No jamb assembly is required on-site, ensuring a precise fit and greater structural integrity.
* The door featured here is an 72" x 96" Openair 23 Double French Steel Door.
The recommended rough opening for this door is 73" x 96.5", allowing space for adjustments to ensure a precise fit. You typically want to make sure your rough opening is 1/2" taller and 1" wider than the door.
Conclusion
Properly measuring your door ensures a perfect fit and smoother installation. If you’re unsure about your measurements, consider hiring a professional or consulting with your door manufacturer. Iron doors are heavy and require precision, so it’s essential to get it right the first time!

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