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 hollow-core or factory-finished leaf may allow only limited edge trimming. Share the exact product specification before purchase. A door that needs more material removed than its instructions permit should be exchanged for a suitable product rather than improvised to fit.
A nominal door size is only a starting point. Measure the existing leaf and show the clear opening at several points. Differences can affect the available margins, so ordering a replacement before checking the frame may leave too little material for a suitable fit.
Existing hinge recesses and screw positions need checking against the replacement leaf. Reusing a hinge depends on its condition and suitability for the new door. Damaged screw holes or a heavier leaf may change the agreed hardware work without making structural changes appropriate.
Hang the compatible replacement leaf, fit agreed ordinary hardware and check floor clearance, alignment and closing in the unchanged opening. Scope limits: Ordinary compatible internal leaf replacement only. No structural opening changes, fire or smoke-rated doors, certification, locksmith services or powered security integration.