Seasonal humidity
Wood doors, frames and sashes swell in summer humidity and shrink in the dry heating season. This reverses each year and is by far the most common cause.
Basement problem
Doors and windows that stick: suddenly stuck or will not latch
Doors and windows that stick often do so because wood swells in humid weather and shrinks in winter. When a door binds and never comes back, something else is moving.
Short answer
Most sticking is seasonal: wood absorbs moisture in humid weather, swells, and releases it again in the dry heating season. Foundation movement produces a different pattern: the problem does not reverse, the gap around the door becomes visibly uneven or tapered, the latch stops aligning, and it usually appears alongside other signs such as new wall cracks, sloping floors or separation at trim. A door that binds every August and frees every January is telling you about humidity, not the foundation.
How urgent is it?
Worth an inspection.
Seasonal binding is ordinary. Binding that does not reverse, especially with cracks or sloping floors, deserves a look.
Likely causes
What usually produces this
Foundation settlement
When part of the foundation drops, the opening above it goes out of square. Gaps become tapered instead of parallel, and the latch no longer meets the strike.
Frost movement
A shallow footing or a porch pier lifted by frost each winter can bind a nearby door predictably in cold weather and release in spring.
Beam or post settlement below
A settling interior post or sagging beam pulls the floor and the partitions above it down, racking door openings on that line.
Framing shrinkage in a newer home
New construction dries and shrinks for the first year or two, which can throw openings slightly out of alignment without any foundation issue.
Hardware, hinges and paint
Loose hinge screws, built-up paint or a settled threshold produce binding that has nothing to do with the structure.
Telling them apart
Seasonal binding versus a moving structure
Nearly every wood door sticks at some point in the year. What separates ordinary swelling from movement is whether it reverses, and what the gaps look like.
| What you notice | Points toward | How to check |
|---|---|---|
| Sticks in humid months, frees up in winter | Seasonal wood swelling | Watch it through one full season; it should come and go |
| Gap is wider at one corner than the other | The opening is racking out of square | Measure the gap at top and bottom of both sides and compare |
| Latch no longer meets the strike plate | Frame has shifted in the wall | Close the door and see where the latch sits relative to the plate |
| Several doors on one side bind together | Something under that whole area is moving | Look for cracks and sloping floor on that side of the house |
| Binds only in deep cold and eases in spring | Frost lifting a shallow footing or porch pier | See whether the door is near a porch, stoop or entry slab |
Why the calendar matters more than the door
Because wood follows humidity, a door that sticks in August and frees up by January is telling you about the weather. A door that stuck in August and is still stuck in January is telling you something else. Vermont's swing between humid summers and very dry heated winters makes this one of the easier structural questions to answer, provided you note when the binding started and check it again in the opposite season before anyone plans or sells a repair.
- 01
Does the binding reverse with the seasons, or has it stayed?
- 02
Look at the gap around the closed door: parallel, or wider at one end?
- 03
Check whether the latch still lines up with the strike plate
- 04
Tighten hinge screws and rule out paint build-up first
- 05
Look for new cracks at the corners of nearby door and window openings
- 06
Check whether floors near the affected opening have gone out of level
Common questions
Doors and Windows That Stick
Do sticking doors always mean foundation problems?
No, and usually they do not. Seasonal humidity is the most common cause by a wide margin, and it reverses each year. Foundation movement produces binding that persists, uneven tapered gaps and misaligned latches, and it rarely arrives alone.
Why do several doors stick on the same side of the house?
That pattern is more suggestive than a single sticking door, because it points at something affecting one whole area of the structure, not one piece of wood. It is worth having the foundation and the supports on that side looked at.
Should I plane the door to fix it?
Not before you know why it binds. Planing a door that is binding seasonally leaves a gap in winter, and planing one that binds because the opening is racking removes the evidence while the movement continues.
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