The door jamb is the frame that installs in the wall and supports the door via hinges.
Standard exterior door jamb thickness.
Also measure the door jamb to know whether or not your home is existing or new construction type of door.
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.
Standard door casing is typically 2 1 4 inch wide and about 5 8 inch thick.
It is important to purchase the right size door jamb along with the door to fit your particular application.
Standard interior door jamb thickness on pre hung doors is 4 9 16 inches.
The jamb width is the width of the jamb as it meets the wall stud of your house.
Is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32 inch widths.
If for some reason your existing interior door isn t a standard door size don t worry.
Although custom doors do cost more money.
If the size is incorrect the door may not fit into the opening or not open completely.
The standard size for an exterior door is 80 inches by 36 inches which is 6 ft 8 inches by 3 ft.
Trim around a jamb is typically referred to as door casing.
Should be the dept of the frame not the width covering the sheeting or siding and wall stud.
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.
Door installation quick tip.
Another advantage would be if your floor isn t level it will allow you to adjust your latch side up or down independently of the hinge side.
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.
Custom doors can be made to match any size door opening.
This thickness is designed for.
Most entry doors are the same industry wise standard size while different sizes can be special ordered.
When ordering a new exterior door you must measure the jamb size.
If you are going to carpet the floor shim the door jambs off the floor about 3 8.
96 inches or 8 ft.
Many people measure the inside jamb of the door and decide that this is the jamb width.
This will allow carpet t o be tucked under the jambs and usually leaves enough clearance so the door doesn t rub on the carpet.
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.
Some door manufacturers sell doors in 7ft 8ft heights and door widths from 24 inches to 42 inches.
The required dimensions to fit a pre hung door including frame and slab jamb size.
In order for the door to fit accurately to the opening without the possibility of future problems you have to get the true measurement of the wall.
See this illustration and table for reference.