Take the measurement between the door frame s exterior trim on one side to the other where the screen door will hang.
How to measure a door for a screen door.
Try to be as accurate as possible.
Last subtract 1 4 or 0 25 inch from the width of your door frame measurement and subtract 1 2 or 0 50 inch from the height of the frame measurement.
Measuring from an existing screen door.
Record the narrowest dimension.
In this video we demonstrate the steps needed to measure for a new sliding screen door.
Again use the smaller of the two measurements and write both measurements down on the same piece of paper.
Starting on the left side measure from the inside edge of trim c blue to the top of the door sill green where you d expect the screen door and sill to meet.
If you have an existing door and you are happy with the fit then we suggest that you measure this door and use these measurements for your new door.
Measure the width again across the center within the door frame and note the result.
Then move the measuring tape down 6 inches above the bottom of the door frame and measure from side to side again.
If your sliding screen doors are missing determine width by measuring from inside of side jamb to center of stile on opposite side just short of where the stationary glass begins.
Measure the opening width horizontally as shown below.
If your door sill is slanted measure to the lowest part of the sill that will rest beneath the screen door.
Extend the measuring tape within the door frame from one side to the other about 6 inches from the top.
To measure a screen door hold the measuring tape inside the door frame about 6 inches from the top and pull it across to the opposite side.
For the height measure from the top of the bottom track into the top u channel see the diagrams below.