Why Does My Door Not Latch Properly? (Easy Fixes)

Quick Answer

A door that will not latch usually has a misalignment between the latch bolt and the strike plate. The most common causes are hinge screws that have loosened over time (causing the door to sag), seasonal wood expansion, or a strike plate that was slightly off from installation. Most fixes require only a screwdriver and take 15 to 30 minutes.

Diagnosing the Problem

Before you grab any tools, spend a minute figuring out exactly what is happening. Close the door slowly and watch where the latch meets the strike plate. This tells you everything.

The latch hits above or below the strike plate hole. This means the door has shifted vertically. Usually the door has sagged, so the latch is too low. Less commonly, settling or swelling has pushed the latch too high.

The latch does not reach the strike plate. The door is not closing far enough for the latch to engage. This is often caused by a warped door, swollen wood in humid weather, or weatherstripping that is too thick.

The latch reaches the hole but does not click in. The strike plate hole is slightly off -- the latch scrapes the edge of the plate but cannot fully enter the recess. You will usually see scratch marks or wear on the strike plate that show you exactly where the latch is hitting.

The door latches but pops open. The latch engages but the strike plate recess is not deep enough to hold it securely. A gust of wind or a slight push opens it.

Try the lipstick test for a precise diagnosis: put a dab of lipstick or chapstick on the end of the latch bolt, close the door, then open it and look at where the mark landed on the strike plate. This shows you exactly how far off the alignment is.

The Fixes, from Easiest to Most Involved

Fix 1: Tighten the Hinge Screws

This is the most common cause of a sagging door, and it is the easiest fix. Over years of use, hinge screws work loose in the wood. The door drops a fraction of an inch -- enough to throw off the latch alignment.

Open the door and tighten every screw in the top hinge, both on the door side and the frame side. If a screw spins freely and will not tighten, the hole has been stripped. Remove the screw, push a wooden toothpick or two (dipped in wood glue) into the hole, snap them off flush, and drive the screw back in. The toothpick gives the screw fresh wood to grip.

For a more permanent fix on the frame side, replace one of the short hinge screws with a 3-inch screw that reaches into the structural framing behind the door jamb. This anchors the hinge to the stud rather than just the thin jamb, and it can pull a sagging door up by an eighth of an inch or more. Use the screw hole closest to the door stop.

Fix 2: Adjust the Strike Plate

If the hinges are tight and the door still does not latch, the strike plate needs to move. This is the most common actual repair and it is very doable.

Fix 3: Address Seasonal Swelling

Wood doors and frames expand in humid weather and contract in dry weather. If your home also has issues with a dehumidifier not lowering humidity, excess moisture may be contributing to door swelling throughout the house. If your door latches perfectly in winter but sticks and fails to latch in summer, wood swelling is the cause.

For mild swelling, wait for drier weather. The problem often resolves itself seasonally. For persistent issues, you have two options: plane or sand the edge of the door where it is rubbing (look for shiny wear marks), or adjust the strike plate to accommodate the seasonal variation.

If you plane the door, you will want to seal the raw edge with primer and paint afterward. Unsealed wood absorbs moisture more readily, which makes the swelling worse next year.

Fix 4: Fix a Warped Door

Hold a long straightedge against the door to check for warping. Interior hollow-core doors can warp due to temperature and humidity differences between rooms -- for example, a bathroom door with steam on one side and dry air on the other.

A mildly warped door can sometimes be corrected by adding a third hinge between the top and bottom hinges, positioned at the point of maximum warp. The extra hinge forces the door back into alignment.

A severely warped door needs to be replaced. Fortunately, pre-hung interior doors are inexpensive and not difficult to install.

When to Call a Professional

Most door latch problems are straightforward DIY fixes. But there are situations where the problem is bigger than it appears:

The door frame itself has shifted. If you see cracks in the drywall around the door frame, or if the gap between the door and frame is noticeably uneven (wider at the top than the bottom, for instance), the frame may have moved due to foundation settling. This goes beyond strike plate adjustment.
Multiple doors in the house are suddenly sticking. This can indicate foundation movement or a structural issue rather than normal wear and tear.
An exterior door is not sealing properly. Exterior doors involve weatherproofing and security. If simple adjustments do not solve it, a professional can ensure the door is properly aligned, sealed, and secure.

For the vast majority of interior doors, though, a screwdriver, a few toothpicks, and twenty minutes will have you closing the door with a satisfying click again.