A sound leaf that only rubs or latches poorly may suit adjustment or hardware repair instead. Replacement is considered for an unsuitable or damaged leaf after checking that the existing opening can accept the proposed door.
A practical internal door replacement decision starts with the affected item, its condition and the surrounding materials. Hang the compatible replacement leaf, fit agreed ordinary hardware and check floor clearance, alignment and closing in the unchanged opening.
Signs: the latch, handle, hinge or ordinary running hardware no longer lines up or operates normally or the door sags, rubs, sticks or has uneven gaps around the opening. Causes: local damage to an accessible component rather than an assumed structural defect or loose fixings, minor alignment drift or ordinary timber movement.
Show which side carries the hinges and how the door swings into the room. Nearby furniture, another door or a light switch can affect practical use. Replacing the leaf does not automatically include reversing the opening direction or moving the stop.
Clear the swing and provide somewhere safe for the removed door. Agree whether disposal is required before the visit. If the existing frame is damaged or movement is apparent, the replacement plan needs review rather than using a new leaf to conceal the problem.