How to Measure for the Rough Opening?
This is important to know, because the actual frame of the door is slightly hidden from view. In order to measure the correct width and height of the unit, the casing or Brickmould needs to be removed. Behind the casing or Brickmould, you can take the actual dimensions of the frame and your rough opening. Your actual rough opening is going to be from one wall stud to the other wall stud. You will also want to measure from the top stud above the door to the floor for the height. There you have it. Your rough opening is found and you can safely shop for the correct door size.
For additional information visit our pre-hanging page.