How to Size a Security Screen Door

The size of door openings on homes can vary. This is why it is so important to know the measurements of your specific door opening before you purchase a door for it, and this includes purchasing a new security screen door. Failure to take accurate measurements can result in you bringing home a brand-new door that will not fit in your opening. Taking careful, proper measurements will save you time in the long run.

Tape measure
Pencil
Paper

Instructions

- 1
  Place the edge of your tape measure against the exterior trim of one of the side jambs, near the top of the door opening. Stretch the tape measure across the door opening to the opposite side jamb and read the measurement. This tells you the width of your door opening.
- 2
  Repeat Step 1 in the center of your door opening and again at the bottom of the door opening. Write down the narrowest width of the three measurements.
- 3
  Place the edge of your tape measure on the bottom right corner. Measure from this corner up to the top right corner. Make sure you are taking the measurement from the edge of the door trim, not from the surface of the doorjamb.
- 4
  Repeat Step 3 in the center of the door and on the left-hand side. Write down the shortest measurement.

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