How To Measure For Steel Doors

Replacing a steel door requires precise measurements to ensure a proper fit. Here's a step-by-step guide on how to measure for a steel door replacement:

• 1. Measure the Existing Door

• Door Width and Height:

  Width: Measure the width of the door from edge to edge. Do this at the top, middle, and bottom of the door to ensure consistency. Use the smallest of these measurements.
  Height: Measure the height of the door from the top edge to the bottom edge at the left and right sides. Use the smallest measurement.

• Door Thickness:

  Measure the thickness of the door from edge to edge. Standard steel door thicknesses are typically 1 3/4 inches, but it’s crucial to confirm this.

• Door Jamb (Frame) Measurements:

  Jamb Depth: Measure the depth of the door jamb from the interior to the exterior wall. This is important for ensuring the new door will fit properly within the existing frame.

  Jamb Width: Measure the width of the door jamb. This includes the thickness of the frame around the door.

• 2. Check the Door Frame

• Frame Width and Height:

  Measure the width of the door frame from the inside edge to the outside edge at the top, middle, and bottom. Use the smallest measurement. Measure the height of the door frame from the top inside edge to the bottom inside edge at both sides. Again, use the smallest measurement.

• Frame Squareness:

  Use a level or square tool to check if the door frame is square. Measure the diagonals from corner to corner. The measurements should be equal; if not, the frame may be out of square, which can affect door installation.

• Check for Wall Plumb:

  Ensure that the wall surrounding the door frame is plumb (vertically straight) using a level. Out-of-plumb walls can affect door alignment.

• 3. Measure the Existing Hardware

• Hinges:

  Measure the position of the hinges on the door and the door frame. Note the height from the bottom of the door to the center of each hinge and the distance from the edge of the door to the center of each hinge.

• Lockset:

  Measure the backset (the distance from the edge of the door to the center of the lockset). Common backsets are 2 3/8 inches and 2 3/4 inches. Record the location of the lockset from the top of the door and from the edge of the door.

• 4. Additional Considerations

• Clearances:

  Measure the gap between the bottom of the door and the floor. This ensures you have adequate clearance for the new door, especially if your floor height varies.

• Weatherstripping and Threshold:

  If you have weatherstripping or a threshold, measure these components as well. New doors may require adjustments to these parts.

• Verify Opening Size:

  Double-check the overall size of the door opening to confirm that the new door will fit. This includes any additional clearance needed for adjustments. Tips for Accurate Measurements Use a tape measure: Ensure you’re using a tape measure that’s long enough and accurate. Record measurements: Write down all measurements clearly to avoid confusion later.
  Check twice: Measure each dimension at least twice to ensure accuracy. By following these steps, you’ll be able to obtain the accurate measurements needed to replace your steel door and ensure a proper fit.