Repairs Explained
Why Doors Stick in Humid Florida Weather
The Real Causes of Sticking Doors and the Fixes That Last Through Seasonal Change
January 27, 20266 min read
Almost every South Florida property has at least one door that binds. It usually starts in the wet months, gets forced a few dozen times, and eventually damages the jamb or strips the hinge screws.
The instinct is to plane the edge of the door. Sometimes that is right. Often it creates a door with a visible gap for half the year and solves nothing permanently, because the underlying cause was never the door's width.
Cause one: seasonal wood movement
Wood absorbs moisture from the air and expands, primarily across the grain. In a climate that swings between roughly forty percent and eighty percent relative humidity, a solid wood door and its jamb can move enough to eliminate the clearance gap entirely.
The tell is timing: the door binds during the wet season and swings freely in the dry season. If that pattern holds, the door itself is fine and the fix is providing enough clearance for the swollen state — which means a small, deliberate amount of material removed and the cut edge sealed so it does not absorb even more moisture.
Cause two: hinge sag
This is the most common cause overall and the most commonly misdiagnosed. Over time the top hinge screws work loose in the jamb, the door drops slightly at the latch edge, and it starts rubbing on the strike side or dragging on the floor.
The diagnostic is simple: look at the reveal — the gap between door and jamb — along the top and along the latch edge. If the gap is wedge-shaped, wider at the top of the latch side and tight at the bottom, the door is sagging.
The permanent fix is not tightening the existing short screws, which are usually spinning in chewed-out wood. It is replacing at least one top-hinge screw with a long structural screw that reaches through the jamb into the framing behind it, pulling the whole hinge back into alignment.
Cause three: the strike plate, not the door
If the door closes but will not latch, or requires a shove, the latch is missing the strike plate hole rather than the door being too big.
Close the door slowly and watch where the latch bolt contacts. Marking the latch with a pencil or lipstick and closing the door leaves a clear witness mark on the strike plate showing exactly how far off it is. Repositioning or slightly enlarging the strike opening is a ten-minute repair.
Cause four: the opening has moved
Buildings settle. Slabs move. In older properties an opening can go out of square enough that no amount of door adjustment produces even reveals.
The tell is that the reveal is inconsistent in a way that does not match hinge sag — tight at one point in the middle of the run, wide above and below it. This is a jamb-shimming repair, and in some cases the casing has to come off to reset the jamb properly.
Cause five: paint buildup
This one is common in older east-side homes with decades of repainting. Each coat adds thickness to both the door edge and the jamb face, and eventually the accumulated film closes the gap.
The fix is stripping or sanding the built-up edges rather than removing wood, followed by repainting with a properly thinned finish on the edges.
Preventing the problem from returning
Seal all six sides of a wood door, including the top and bottom edges, which are frequently left bare. Unsealed end grain absorbs moisture far faster than finished faces and is the main path by which humidity gets into a door.
Consider the door material for problem locations. Solid-core doors move less than solid wood, and fiberglass exterior doors do not move with humidity at all — which is why they have become the standard exterior choice in this climate.
- Seal the top and bottom edges of every wood door
- Use long structural screws in the top hinge on any door showing sag
- Adjust the strike plate before considering planing the door
- Leave adequate clearance for the swollen wet-season condition, not the dry-season one