Quick Answer

An interior door that sticks can be an annoying, seemingly minor issue that often points to larger, yet usually simple-to-fix, underlying causes. While many homeowners immediately blame humidity, the culprit can range from loose hinge screws and failing shims to foundation shifts or even a fresh paint job. This guide will walk you through diagnosing the exact reason your door is catching and provide step-by-step instructions to get it swinging freely again, typically requiring only basic tools and a bit of hands-on effort.

The Problem

You push or pull your interior door, and instead of gliding smoothly, it grinds, scrapes, or snags against the door frame or the floor. Sometimes it's a persistent rub at the top, bottom, or side; other times, it's a subtle catch that makes closing the door feel like a struggle. This isn't just an inconvenience that makes noise or scrapes paint; if left unaddressed, a sticking door can lead to damaged trim, worn flooring, or even structural stress on the door frame itself. Understanding why your door is resisting closure is the first step toward a lasting solution.

How It Works

To understand why a door sticks, it helps to visualize the door and its frame as a precisely fitted system. A standard interior door hangs on two or three hinges, each secured with screws into both the door slab and the door frame (jamb). The frame itself is installed into the rough opening of the wall, typically secured with shims to ensure it’s perfectly plumb (vertically straight) and square (at right angles). This precise alignment is crucial for the door to operate without friction. The gap between the door and the frame (known as the reveals) is typically a consistent 1/8 inch to 3/16 inch on all sides. When this delicate balance is disturbed, even by a fraction of an inch, the door will begin to drag or bind.

Wood, being a natural material, is hygroscopic, meaning it absorbs and releases moisture from the air. In humid conditions, wood absorbs moisture and swells, increasing its dimensions. Conversely, in dry conditions, it releases moisture and shrinks. This expansion and contraction is a primary reason doors stick seasonally. Beyond humidity, hinges play a critical role. Loose screws allow the hinges to sag, dropping the door out of alignment. Over time, the constant stress of opening and closing a heavy door can strip out screw holes, exacerbating the problem. The door frame itself might settle or shift due to foundation movement, heavy loads on upper floors, or even improperly installed framing. Any deviation from the original plumb and square installation will cause the consistent reveal gaps to disappear in certain areas, leading to friction points. Understanding these components helps in pinpointing the exact cause of your sticking door.

Step-by-Step Fix

1. Identify the Contact Point — Pinpoint where the door is sticking.

Open and close the door slowly, observing closely where it makes contact with the frame or floor. Look for scuff marks, worn paint, or shiny spots. If it's difficult to see, place a piece of paper between the door and the frame at various points; the paper will snag where the door is tight. A common diagnostic trick involves drawing a pencil line on the frame or floor where the door is binding. This precise identification will dictate your repair strategy.

• If the door rubs the top or bottom: This often indicates a vertical alignment issue or swelling.
• If the door rubs the hinge side: This can be a sign of loose hinges or a frame pulling in.
• If the door rubs the latch side: This usually points to loose hinges on the opposite side or a misaligned strike plate.

2. Check & Tighten All Hinge Screws — Ensure hinges are securely fastened.

Over time, hinge screws can loosen due to the constant movement of the door, especially if the door is frequently slammed. Using a Phillips head screwdriver, firmly tighten every screw on all hinges, both on the door and on the door frame. Don't overtighten, but make sure they are snug. Pay particular attention to the top hinge, as it bears the most weight and is often the first to loosen. Test the door after tightening.

• Tools: Phillips head screwdriver
• If screws spin in stripped holes: Remove the screw, insert 2-3 wooden toothpicks or a golf tee (snapped off flush) into the hole with a dab of wood glue, let it dry, then reinsert and tighten the screw. For a more robust fix, you can move up to a longer screw that can bite into the wall stud behind the jamb.

3. Address Loose Hinges with Longer Screws — Provide better support for the door.

If tightening the existing screws doesn't solve the problem, or if the door still sags, it's possible the original screws aren't long enough to adequately bite into the wall stud behind the door jamb. Replace one of the short, middle screws on the top hinge (on the frame side) with a 2 1/2- to 3-inch wood screw. This longer screw will reach through the jamb and into the wall stud, providing much greater support and pulling the door closer to the frame, often lifting the latch side of the door. Repeat this for the middle hinge if needed. Do not replace all hinge screws with long ones; one or two per hinge on the frame side are usually sufficient.

• Tools: Phillips head screwdriver, 2 1/2 to 3-inch wood screws (#8 or #9)
• Why only one or two? Replacing all screws with long ones can over-compensate and pull the door too far into the frame, creating new sticking points.

4. Bend a Hinge Leaf (For Minor Latch-Side Rubs) — *Subtly adjust the door

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