If your door does not close properly after installing a new jamb, start by checking alignment and level immediately.

First check the hinge screws and jamb position by opening the door and sighting down the hinge line for gaps or twists; tighten long screws into the framing to draw the jamb toward the studs and use a level to confirm the jamb is plumb and square in both planes. If the door binds at the top or bottom, remove the strike plate and close the door slowly to see where contact occurs, then mark the high spots on the door edge or jamb and sand those areas lightly with a block and medium grit sandpaper until the door moves freely. If the latch does not engage, adjust the strike plate by loosening its screws, tapping it slightly with a block of wood to reposition, and resecure it while testing the latch engagement; for larger misalignment, chisel the strike mortise deeper or upward in small increments. Weather stripping or the door stop can prevent full closure when installed too thick or misaligned, so peel back or reposition the strip and trim the stop by planing a little off where the door contacts it. When reinstalling hardware, ensure the hinges are fully seated and that hinge mortises are flush so the hinge leaves do not protrude; use longer screws in the top hinge to stabilize sag and prevent gradual misalignment. Always test the door several times after each small adjustment to avoid removing too much material and to confirm smooth consistent operation.

Common mistakes include assuming paint or finish swelling is the cause when the problem is misaligned hardware, which you can rule out by tightening and adjusting screws first before planing or sanding. Another frequent error is over-sanding the jamb or door edge, leaving gaps that compromise weather performance, so sand sparingly and test repeatedly to keep material removal minimal. A third issue is setting the strike plate without confirming the latch path, which leads to repeated rework; solve this by tracing the exact latch contact, mortising incrementally, and using a file to fine tune rather than large chiseling.

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