Interior doors can become nicked, dented, and damaged over the years. Sometimes it is layers and layers of various colored paints over the veneer that leave the door needing to be removed and replaced. Whatever the reason, replacing an interior door is a relatively inexpensive and simple job for most home repair amateurs. 1. Replacing only the door.
If you will not be replacing the frame and door jamb, you may only need to remove and replace a few screws and a little hardware to get the job done. Use a punch or screwdriver and hammer to remove the pins that hold the hinges together on the door. Put the punch against the bottom of the pin in a hinge and tap the punch with the hammer to force the pin up and out of the hinge. Once you have loosened the pin, you should be able to grip it and pull it out of the hinge.
Lift the door off of the hinges and lay it across a work bench.
Remove the screws that hold the door to the hinge and set them and the hinge in a safe place. Swap the old door with the new one and use the screws to fasten the hinges onto the new door. Lift the door into position and insert the pins back into the hinges to complete the replacement.
Install the door knob.
If you are installing a new door knob, follow the directions that came with the new piece of hardware for correct installation. Most of the time, this involves sliding the plunger mechanism into the hole in the edge of the door with the rounded edge of the plunger facing toward the door jamb.
Slide the plunger in until the face plate sits snugly against the door.
Install the two screws that come with it to fasten it into place. Insert the knob that will be outside of the room into the large opening in the door so that the screw receptacles pass through the plunger mechanism. Slide the other knob into place and install the two screws to fasten the two door knobs together. If you are going to replace the plate on the door jamb, remove its screws put the new plate into position and attach it with the new screws that came with it.
2. Replacing an existing door with a pre-hung door.
If you are changing the style of the door or the size of the opening, you may have to replace the door, the door jamb, and trim. You can choose to do this if you are trying to give a house a facelift and believe the additional expense of the pre-hung door will add value to your home.
Remove the trim from around the door.
Use a screwdriver or small pry bar to loosen the trim. If you plan to recycle the trim for a future project, you may want to use a very small punch and drive the nails through the wood to release the trim. This method reduces the likelihood of excessive damage happening to the wood.
Tap the pins out of the hinges.
Using a punch or small screwdriver, place the punch against the bottom of a pin in one of the door hinges and drive it upward to release the pin. Grip the top of the pin and pull it from the hinge. Repeat this for each hinge. When all of the pins have been extracted, lift the door up and off of the hinges. You can choose not to do this step, but the door will add weight and bulk to the frame when you are removing the frame in the next step.
Pry the door frame loose from the studding.
Use a pry bar to gently nudge the framing away from the studding around the door opening. There are usually shims between the framing and the studs. You may want to leave these shims in place until you see if they are needed with the new frames. Because doors and frames are often made to standard sizes, there is a good chance that the same shims will work in the same location for the new door frame. When the frame is loose all of the way around, push or pull it from the opening and set it out of the way.
Separate the inside from the outside of the new door frame.
The pre-hung door should be attached to one half of the framing. The other half should be only framing with the trim attached. Once you have released the inside and outside of the frame from each other, measure the height of the rough door opening and cut off the door frame to match. The frames are usually an inch or so too long so that they can fit into various sizes of rough openings.
Push the door portion of the frame into position.
Prop it in place if needed. Push the other half of the framing in from the other side until the two halves join. If there are no problems with the new door and frame fitting correctly into the opening, make sure that the shims are the right size. If not, make new shims that will fit more precisely between the door frame and studs. Check the door to make sure it is level across the top and along the sides. It should open and close easily.
Nail or screw the frame to the studding.
The screws or nails should be inserted where the shims are located. Countersink the screws or nails so that they can be hidden with caulk or some other type of filler that can be painted over. Use finishing nails or a nail gun to attach the trim to the wall.
Test the door.
Open and shut the door to make sure that it is working properly. Fill the nail or screw holes. Paint the door, frame and trim to your preferred color. Install the new door knobs