Prehung Door Jamb Dimensions

Typically a pre hung door is measured in 30 inch and 36 inch sizes with additional sizes available in non standard widths.
Prehung door jamb dimensions. When measuring for casing length add at least 2 1 2 inches 3 inches is best to the height of the opening for the two vertical pieces and 6 inches for the horizontal piece across the top. Jan 20 2017 learn what is a jamb and how to measure the width of your door jamb. Left hand solid core primed hdf single pre hung interior door with 6 9 16 in. The depth of a standard door jamb is 4 5 8 inches which provides an extra 1 8 inch to account for slightly thicker walls due to stud size variation.
4 9 16 for 2x4 frame with drywall. Trim around a jamb is typically referred to as door casing. The jamb s depth should match the thickness of the wall including the plaster or drywall. When you arrive onsite the house is plaster and lath making the jambs much wider than the opening.
The door jamb is the frame that installs in the wall and supports the door via hinges. When building a door jamb to fit a standard wall with a two by four frame and 1 2 inch drywall on each side the width of the jamb board typically is 4 9 16 inches. Prehung doors are made to fit rough openings 2 to 2 1 2 inches bigger than the corresponding dimensions of the jamb. Jamb model z03745810l 363 58.
If you re not using premade jamb material or if your walls are a nonstandard thickness you can buy 5 or 6 inch wide lumber and rip cut it to the width of the wall using a table saw. If you do not remove the trim measure from the inside edges of the trim or moulding make sure you are measuring from the visible edges of the jamb to get the correct size. Say your client orders solid masonite or otherwise prehung doors where the jamb is the standard 4 9 16. The doors are also a standard 80 inches tall.
Standard door casing is typically 2 1 4 inch wide and about 5 8 inch thick. Standard interior door jamb thickness on pre hung doors is 4 9 16 inches. Typical door jamb sizes are. To measure the door jamb size you may need to remove any trim moulding or siding you have on the door.
This is an important section to read prior to ordering your new pre hung door unit.