You put your shoulder into the bathroom door to get it shut, and it has been like that since June. Some week in the middle of furnace season it will let go on its own, and by February the same door knocks against its stop every time the heat comes on. That door is telling you something ordinary.
The one that never lets go is telling you something else, and so is the one that drags at one corner and nowhere else. Same complaint, three causes, and they do not share a repair. Most people skip this part and go straight for a plane, which is how a door that stuck through one humid summer becomes a door that rattles every winter after it.
Read the rub mark before you touch anything
Two pieces of evidence, both free, both collected standing in the doorway.
The first is where the door is actually rubbing. Look along the latch edge, the top and the bottom for paint burnished to a shine, a gray smear, or a groove worn where the leaf crosses the stop. If the mark is not obvious, use a dollar bill: shut the door on it and pull it out, every hand's width around the whole perimeter. Where it slides out clean the gap is open. Where it grips, that is the tight spot.
The second is the shadow line. Get a light behind the door and read the gap the whole way around. Tight the entire length of the latch edge points one way. Tight at the top corner and opening toward the floor points another. Closed at one corner and open at the corner diagonally opposite points at the opening itself.
Then write down the month. A door that binds in July and hangs free in January is a moisture story. A door that binds in both is a geometry story, and no amount of dehumidifying touches it.
Cause one: the leaf and the jamb are swollen
Most of them, and the least serious. Wood takes on water vapor from the air around it and gives it back when the air dries out, all year, forever. It moves across the grain and barely along it, so the leaf gains width while the jamb legs thicken from behind, and the gap closes from both sides at once. That is wood behaving normally here, not damage.
How you tell. The mark is a stripe, not a spot — burnished along most of the latch edge, often worst near the middle. The bill grips the whole way down that side and slides out clean at the head and the hinge side. The door still latches, it just takes effort. And it eases off a few weeks into heating season. If you can say "it was fine at Christmas", you are here.
Bathroom doors go first, then basement doors. A bathroom door that swells while the rest of the house is fine is usually a ventilation problem, and the question is whether the fan moves steam out of the room or just makes noise. A leaf finished on both faces but left raw top and bottom drinks vapor through those edges all summer, which is why one door misbehaves and its neighbor does not.
What to do. Wax the latch edge with a candle stub, check the hinge screws, run the fan longer. What not to do: plane it in August. You would be cutting the door to fit at the week of the year it is biggest, and the winter bill is a rattle, a latch that misses the strike and light in the hall. If a door has to lose size it loses it in the dry half of the year, by the smallest amount that clears, and the cut edge gets primed the same day. A raw planed edge is a wick.
Cause two: the hinges have let go of the jamb
This gets misread as swelling, because it also worsens in summer and also shows at the latch edge.
The top hinge carries the weight of the door in tension. It is trying to pull itself out of the jamb every minute of the day, and on a leg shimmed badly, or fastened with screws that only bit into the jamb and never reached the trimmer stud behind it, it wins. The jamb draws in at the top, the leaf tips, and the top latch corner goes tight against the head and the strike jamb while the gap along the latch edge opens toward the floor. A solid-core leaf gets there faster than a hollow one.
How you tell. Three tests.
- Read the taper. On a swollen door the latch gap is even. On a sagged one it is a wedge, tight at the top corner and widening toward the floor.
- Lift it. Open the door, take the knob, lift straight up. If the bind releases while you carry the weight, the hinges are the answer and nothing about the door itself is wrong.
- Look behind the leaves. A shadow between the top hinge leaf and its mortise, a hinge cocked out of square, a screw head standing proud. Put a screwdriver on each screw. One that turns and turns without getting tight is out of wood.
What it takes. The best outcome on this list, because it is genuinely a Saturday. Pull the top hinge screws one at a time and replace them with screws long enough to pass through the jamb and the shim behind it and bite into framing. Reamed holes get a hardwood plug glued in and drilled fresh. Snug, not tight — crank a long screw and you pull the leg past its shims and put a new taper in the reveal where you just took the old one out. If the latch still misses once the door hangs straight, the strike moves, not the door. What a jamb is supposed to do is in new doors in an old house.
Cause three: the opening racked, or the floor grew
Here the mark stops moving with the calendar. Same place in July and January, usually one corner or the bottom edge.
The opening racked
Framed openings do not stay where they were nailed. A header settles, a beam or post under the floor moves, soil under a footing swells and shrinks with the seasons, and in cold weather truss movement lifts the top plates of interior partitions — the same thing behind the ceiling crack that comes back every February. A rectangular door in an opening gone to a parallelogram rubs at one corner and gaps at the other.
Measure both diagonals of the opening; equal means square. Put a level on the hinge jamb in both planes. Then look at the room instead of the door: casing mitres that opened at the top and stayed open, a diagonal crack running up from the corner, nail pops that keep coming back, windows that got stiff in the same season. One sticking door is a door. Four of them with a crack over each is a building.
The floor got thicker under it
A door undercut for carpet and pad has a lot of air beneath it. Take the carpet out, add tile over a mortar bed, or lay a floating floor over the old one, and the leaf drags — often only over one stretch of its arc, where a transition sits or the floor humps. The mark is on the bottom edge, not the latch edge, and nothing about the latch changed. Push on the floor in the doorway: a soft spot under a bathroom or laundry door is a leak, not a build-up.
Doors get hung to the finished floor, which is why what covers the difference where two floors meet gets decided early, and why the deck gets read for flatness in the same visit as leveling a subfloor. Cutting the bottom of a leaf is doable at home: score the finish so the veneer does not tear, remember a hollow-core door has only so much bottom rail before the cut opens into honeycomb, and finish the fresh edge. That gap is doing a job in some rooms — no undercut and no grille is how a room ends up stuffy with the door shut.
The rattle is the same story from the other end
The leaf shrinks, the gap at the stop opens, the latch no longer pulls the door tight against anything, and the furnace shifts enough air to knock it.
Almost always the strike, not the door. Most residential strike plates have a tab that bends slightly to take up the slack. A plate in the wrong place gets moved, which means filling the old holes properly rather than driving new screws beside them into wood that has already given up. Adhesive bumpers kill the noise without solving anything, which is a fair answer for a closet.
A door that rattles all winter and binds all summer is the healthiest version of this whole post. The geometry is right and the wood is doing what wood does.
Which of these is a Saturday and which is not
Yours, with a screwdriver: long screws into the top hinge and plugs in the reamed holes, bending or relocating a strike plate, wax on a latch edge, running the bath fan longer, undercutting a slab carefully for a floor that came up.
Not yours, and less a repair than a small remodel:
- A jamb out of plumb, bowed or in wind. It comes out, gets shimmed at every hinge and screwed to the trimmer, and that means casing off both faces, drywall patched where it sat, and paint. The door was never the problem.
- An opening that racked and will rack again. Resetting a jamb inside a moving opening buys a season.
- Anything where the floor under the doorway is soft.
When it has to be opened up to know
Sometimes the honest answer is that we cannot tell you from the hallway. A jamb that looks fine can be nailed through a shim that was never there, or set against a trimmer with a plumbing stack notched out of it. The casing has to come off to see it, and taking casing off a painted wall means patching and repainting whether or not we find anything. We would rather say that first than call it a look and hand you a bill for drywall.
Same for a jamb leg gone dark and soft near the floor, which we find at basement and laundry doors. What made it wet decides everything — the order of operations behind a basement wall gone soft at the bottom. If there is visible growth on the framing around it, testing and remediation are specialist trades. We do not test for mold, diagnose it or abate it, and we will not tell you what it means for your health. The EPA and the Indiana Department of Health publish guidance on both.
Where this stops being carpentry
If the floor slopes, the diagonals are well out, cracks are opening over several openings at once, or the foundation wall downstairs is stair-stepping, that is a foundation contractor and probably a structural engineer. A wet subfloor under a doorway is a plumber first. Nothing carpentry does survives an active leak, and we will say so rather than fit new wood into one.
In the older housing around Fishers, Noblesville and Carmel we also find the dullest cause of all: paint. Coat after coat on a latch edge and a stop, laid on with the door closed each time, until the door has run out of room. That is what an older house here turns up more often than anything structural, and it is worth ruling out first.
What to remember
Read it before you cut it. A stripe down the whole latch edge that eases off in winter is wood doing its job. A wedge tight at the top corner is hinges, and longer screws usually end it. A mark that never moves through the year is the opening or the floor, and that is the one worth having someone look at.
When doors are part of larger work they go in at the end for exactly these reasons, after the floor is down and its height is known — last in a finished basement, after the tile in a bathroom. Rooms taken apart and put back with their openings squared up are on our projects.
If you have a door doing something you cannot read, or four of them doing it at once, ask for an estimate and we will put a level on the jambs with you.
