How-to measure your doorway opening to purchase and install the correct storm door.
Measure the opening width (horizontally) as shown, referring to the following diagrams below. Take three measurements, one across the top, middle and bottom of the door (A, B, C). Record the narrowest dimension.
Questions? Call us at 1-877-473-5527
For storm door questions, please call 1-866-809-9460.