A door that suddenly rubs the jamb on a damp morning can make a homeowner wonder why doors swell when they looked perfectly fine a few months ago. Around Mar Vista, Santa Monica, Venice, and other coastal Los Angeles neighborhoods, this is a common complaint, especially with older solid-wood doors. The answer is often moisture, but the repair is not always as simple as shaving an edge.
Before I alter an original door, I look at where it is binding, whether the problem changes with the weather, and whether the opening itself has moved. A good old door is worth preserving. Removing too much wood to solve a temporary seasonal issue can leave a permanent gap when the door dries out.
Why Doors Swell: Wood Absorbs Moisture
Wood is not a fixed, inert material. It takes on and releases moisture from the air, even after it has been milled, installed, stained, and painted. As the moisture content rises, the wood fibers expand. This movement is usually greatest across the grain, not along its length.
That matters because a door is made of rails, stiles, panels, glue joints, and often veneer or molding details. A solid wood door may grow just enough during humid weather to catch on the jamb, scrape the threshold, or become difficult to latch. A painted door can still absorb moisture through unfinished edges, worn paint, lock cutouts, hinge mortises, and small cracks in the finish.
Los Angeles does not have the long, wet winters found in some parts of the country, but coastal air is consistently more humid than many homeowners expect. Morning marine layers, wind-driven rain, shaded entryways, and irrigation overspray all add moisture. A door on the ocean-facing side of a Santa Monica or Venice home may behave very differently from an interior door or a sheltered door on the opposite side of the house.
Not Every Binding Door Is Actually Swollen
A door that sticks is often described as swollen, but swelling is only one possibility. The location of the rub gives useful clues.
If the door rubs along the top edge or upper latch side, loose hinges may be allowing the slab to sag. This is particularly common with heavy, older panel doors hung on undersized screws. The short screws supplied with many hinges only bite into the jamb, not the framing behind it. Replacing selected screws with properly sized structural screws can pull the jamb side back into position without changing the door.
If the door drags at the bottom, look for a wet or damaged bottom edge, a raised threshold, loose flooring, or a door that has dropped on its hinges. Exterior doors are also vulnerable to water being held at the sill. A failed sweep, clogged drainage path, or poorly sloped threshold can keep the bottom rail damp long enough for it to expand and deteriorate.
Binding evenly along the latch side can point to seasonal swelling, but it can also mean the jamb has shifted. Homes settle, framing moves, and plaster or drywall repairs sometimes conceal changes around an opening. In older West Los Angeles houses, I also watch for termite damage around exterior jamb legs and trim. Soft or compromised wood can let the opening move, creating a door problem that looks like a simple fit issue.
Water Entry Causes More Than a Tight Fit
Seasonal humidity usually causes modest movement. Direct water exposure is more serious. If a door swells after rain, shows dark staining at the bottom, has peeling paint, or feels soft when pressed with an awl, the door may be taking on water through a failed weather seal or unfinished surface.
The bottom edge deserves special attention. Many doors are painted on the faces and edges but never properly sealed on the bottom before installation. Once moisture enters end grain, it can travel upward. Repeated wetting and drying can split joints, lift veneer, loosen panels, and eventually cause rot.
A swollen door may also be warning you about the area around it. Water can get behind exterior casing through failed caulk, poor flashing, roof runoff, or sprinklers aimed at the entry. Simply planing the door may make it close today while the jamb and framing continue to get wet behind the trim.
Diagnose the Door Before Reaching for a Plane
I start with a close inspection while the door is in the condition the homeowner is complaining about. It helps to operate it slowly and identify the exact contact point. A light pencil mark, transfer paper, or a careful look at scuffed paint will show where the door is meeting the frame.
Next, I check hinge tightness, screw condition, jamb alignment, reveal gaps, and the threshold. The reveal is the narrow, consistent space around the door. If the gap is tight only at one corner, the issue may be hinge or frame movement. If the entire perimeter is tight and the weather has been unusually damp, swelling is more likely.
For exterior doors, I inspect the paint and sealant condition on all six sides where accessible: front, back, two long edges, top, and bottom. I also check whether the weatherstripping is compressed too tightly or has become hard and distorted. Weatherstripping should seal the door, not force it out of alignment.
A moisture meter can be useful when there is a question of active water intrusion. It does not replace judgment, but it can help distinguish a door that is seasonally damp from one with a persistently wet bottom rail or jamb.
The Right Repair Depends on the Cause
If loose hinges are the problem, correcting the hinge attachment may restore the fit with no cutting at all. If a hinge mortise is worn or the jamb is damaged, the repair can involve rebuilding the screw holes, adjusting the hinge position, or repairing the jamb material so the door hangs square again.
When an exterior door has absorbed water, the first repair is stopping the water. That may mean replacing a worn door sweep, adjusting the threshold, improving the sill seal, repairing exterior trim, or correcting sprinkler overspray. If the finish has failed, loose paint needs to be removed, bare wood needs proper primer, and the repaired area needs a durable exterior coating. A door cannot stay stable if its edges are left exposed.
Planing is appropriate when the door is sound, the opening is stable, and the clearance is genuinely insufficient. But it should be measured work, not aggressive sanding. I remove the minimum material needed, maintain the door’s existing bevel, ease the sharp edge, reseal exposed wood, and touch up the finish. On a stained or varnished old door, this can require careful color matching so the repair does not announce itself from across the room.
Sometimes a homeowner asks me to take a large amount off a door because it is sticking during one wet spell. That is where restraint matters. A door that needs an eighth of an inch removed in February may have an obvious draft gap in August. If the issue is seasonal and minor, correcting weather exposure, hinge condition, or paint buildup may be the better long-term answer.
Older Doors Need a Preservation-Minded Approach
Many older homes in the Westside have doors that would be expensive to replace well. Original solid-core interior doors, craftsman-style entry doors, and doors with old mortise lock hardware often have better material and more character than a basic replacement slab.
These doors can usually be repaired, but the work has to respect how they were built. A mortise lock pocket limits where material can safely be removed. Decorative panel profiles can make a new door difficult to match. Older jambs may be out of square, which means fitting a replacement door can take more labor than restoring the existing one.
At Multitrade Home Repair, I regularly see doors that have been trimmed repeatedly over decades without addressing the underlying cause. The result is often a door with an oversized gap, poor weather resistance, or a latch that barely reaches the strike. Careful diagnosis protects the door, the hardware, and the security of the opening.
Keeping a Door From Swelling Again
A few maintenance steps can prevent many repeat problems. Keep sprinklers from hitting doors and trim. Make sure gutters and roof runoff do not dump water near an entry. Repaint or reseal worn exterior surfaces before bare wood is exposed, and pay particular attention to bottom edges and lower corners.
Check weatherstripping and sweeps at least once a year. Replace material that is crushed, torn, or hardened, but choose the profile carefully. An overly thick seal can make a properly fitted door feel swollen. If a door begins sticking after a period of rain, avoid forcing it hard enough to damage the latch, hinges, or jamb.
A sticking door is a small problem until it becomes a water-damage, security, or access problem. The useful question is not just whether the door needs to be shaved. It is what changed, where the moisture is coming from, and how to make the repair hold through the next season.