A: Hollow-core interior doors are inexpensive to replace ... make sure it is in the new door, too. When the door is cut to size, mortise the hinges. In this case, mortising refers to cutting ...

clearance under the door. Remove the door by pulling out the hinge pins and lay it on a pair of padded sawhorses. Carefully cut off the door at the pencil mark to get a clean, square edge.