Loose door knob

How a door knob is held on

Most modern door knobs have two halves that sandwich the door. Two long screws run from the inside rose through the door into the outside half, and the latch sits in the door's edge with a spindle connecting the knobs through it. Over years of turning and slamming, those screws loosen and the knob wobbles.

Older knobs, often found in older homes with mortise locks, work differently. A square spindle passes through the door, and each knob slides onto it and is held with a small set screw on the knob's neck. When that set screw loosens, the knob can spin or pull right off.

Why door knobs get loose

Let's fix it

1. Tighten the visible screwsLook at the rose on the inside of the door. If you see two screw heads, hold the outside knob still and tighten them with a screwdriver. Alternate between the two so the knob pulls in evenly. Stop when it's firm; overtightening can make the latch bind so the knob won't spring back.
   Done

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2. Get to hidden screwsIf the inside rose is smooth with no screws, look on the neck of the knob for a small slot or hole. Push a paper clip or small screwdriver into it while pulling the knob off. Then look for a notch at the edge of the rose and pry it off gently with a flathead, or on some models turn it to unlock it. Tighten the two mounting screws underneath, then snap the rose and knob back on.
   Done

   Something went wrong?

   • The rose won't pop off Look for a tiny notch at the edge and twist a flathead there. Some roses unscrew counterclockwise instead.

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3. Tighten the set screw on older knobsOn older knobs, look for a small screw on the side of the knob's neck. Loosen it, push the knob onto the spindle until it's snug against the rose without binding, and tighten the screw. Some spindles are threaded so you can screw the knob on to adjust how tight it sits. A worn or stripped spindle can be replaced cheaply.
   Done

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4. Check the latch screwsOpen the door and look at the latch plate on the door's edge. Tighten its two screws. If one just spins, the wood is stripped: pull the screw, fill the hole with wood glue and wooden toothpicks or a golf tee, let it dry, trim it flush and drive the screw back in. A loose latch can make the whole knob feel wobbly.
   Done

   Something went wrong?

   • The screw still spins after filling the hole Let the glue dry fully, or use a slightly longer screw of the same size.

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5. Replace a worn knob setIf the screws are tight but the knob still wobbles, sticks or doesn't spring back, the latch or knob mechanism is worn. Measure the backset, which is the distance from the door edge to the center of the knob hole; it's usually 2-3/8 or 2-3/4 inches, and many latches adjust to either. Check the door thickness too, since most knob sets fit doors about 1-3/8 to 1-3/4 inches thick. Remove the old knobs and latch, install the new latch first, then the knobs, following the instructions.
   Done

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Watch it done

How to fix a loose door knob (if no screws are visible)By Chakmahtheking on YouTube. Their method may vary a little from ours.

Watch on YouTube

If it's still not right

If it swings fine but squeaks, see the guide for fixing a squeaky door hinge.

If the knob is tight but the door won't stay closed, the latch may not be lining up with the strike plate. Check our guide for a door that won't latch.

If the problem is a deadbolt that's hard to turn rather than the knob, there's a separate guide for a sticky lock.

Loose door knob questions