A door wedge or a thin piece of cardboard is useful for testing the gap. Next, check the hinges by opening the door and inspecting the alignment of the hinge plates.
Adjusting Hinges to Fix Door Sagging
As a building settles, the frame can become slightly misaligned, causing the door to shift upward or to one side. To fix this, close the door and observe where the latch hits the strike plate.
Tools and Materials Required Gathering the right tools is the first step toward a successful repair. You will need a standard screwdriver set, a hammer, a measuring tape, and a reliable pencil for marking.
How to Adjust Door Hinges for Proper Alignment
Fortunately, this is a problem that can almost always be resolved without calling a professional, by methodically diagnosing the specific cause and applying the correct adjustment. Aligning the Strike Plate Even after adjusting the hinges, the door might still fail to latch if the strike plate is not aligned with the latch.
More About How to fix a sagging door that won't latch
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