How To Measure Door Frame Size
Calculate the width of your new door.
How to measure door frame size. Measure the width of the door frame from the outside of the jamb on one side to the outside of the jamb on the other side. Net frame size may vary for each manufacture most of the manufacturers offer to trim the unit from the height and width but within a limit. This takes into account the thickness of a standard 3 4 inch doorjamb on each side. Internal width divided by 2 plus 14mm equals required door size.
Add 2 to 2 1 2 inch to the measurement of the door s width to determine the total width of the rough opening. Dimensions taken from outside the frame. Measuring for a new door is a simple process. Measure the height of the door opening in several spots.
At the top middle and bottom of the frame and use the smallest measurement. It is some times easier to fit doors to a frame than build a frame to a door. A standard hinged door measures 30 inches wide by 80 inches tall which building trades workers call a 2 6 door for 2 feet 6 inches wide. It s important to have the two vertical frames parallel and if you can wait it can be a good idea to build your frame first then measure for the doors.
Most of the time when you buy a door you ll want a pre hung door which means it comes with the frame jamb included. When replacing a hollow metal door on an existing steel door frame precise measurements are needed to ensure that the new door will fit properly. Use the smallest figure as your measurement. Measure the height of the door right in the middle.
Internal size 640mm 2 320 14mm 334mm. Just to be safe measure the area where your door will go too. How to measure for a new door and frame. Record the height and width of the door frame space.
The chart below includes hardware locations for the most popular manufacturers of hollow metal doors and the most common door heights. Go with the larger number. Measure the height of the door frame from the bottom of the. Remove the casing trim on one side of the door interior side for exterior doors using a flat pry bar.
Measure the width of the door in 3 locations. This will help ensure that you select the exact right replacement door. Width of new door opening dimension minus thickness of two door frame side pieces minus gap on left side minus gap on. Again be exact about this and take measurements from a few different spots.