Doors and Windows Suddenly Sticking or Won't Close

Quick Answer

Doors and windows that suddenly stick or refuse to close are the number-one early warning sign of foundation movement. However, a single interior door sticking only during summer is almost always seasonal wood expansion from humidity — not your foundation.

Quick Facts

My Door Suddenly Won't Close Properly — Is This a Foundation Problem?

You push your bedroom door shut the way you have done a thousand times, and it catches hard against the frame about two inches from closed. You lean into it and it latches, but the top corner is grinding against the jamb. Yesterday it closed fine. The latch no longer lines up with the strike plate — you can see the bolt hitting the metal plate a quarter inch too high.

You walk through the house testing other doors. The bathroom door upstairs closes fine. The back door to the patio sticks slightly at the bottom. In the kitchen, you notice the window over the sink takes more force to slide open than it did last month. You may also see a small gap forming at the top of one door frame where the trim has pulled away from the wall — a gap you swear was not there before.

The timing matters. If this started in June and your area has been humid, the door may simply be swelling with moisture. But if this started in September after a dry summer, or if it appeared suddenly after heavy rain, the timing points away from simple wood expansion. Check whether the door frame itself has shifted by holding a level against the vertical jamb — if it leans more than 1/4 inch over its height, the frame has racked, and that movement came from below.

Why This Happens

Step 1 — The foundation beneath one wall settles or heaves relative to the adjacent wall. In areas with expansive clay soil (Plasticity Index 35–70 in DFW Eagle Ford Shale, per UT Austin CTR Report 0-5202-3), the soil volume changes with moisture content, pushing one footing up or allowing it to drop. As little as 1/4 inch of differential movement between two walls distorts the door frame.

Step 2 — The rectangular door frame deforms into a parallelogram. A door frame is a rigid rectangle attached to the wall studs and header. When the floor drops on one side, the frame skews. The door itself stays flat, but the opening it swings into is no longer square — so it binds against the jamb on the high corner.

Step 3 — The door or window panel contacts the frame at points that previously had clearance. Standard door clearance is 1/8 inch on each side. A frame distortion of just 3/16 inch eliminates this gap and causes binding. With 50% of US homes built on expansive soils (ASCE), this is the most common early foundation symptom homeowners report.

What To Do Next

1. Test every door and window in the house for free. Close and latch every interior and exterior door. Slide every window open and shut. Write down which ones stick and where they bind (top, bottom, latch side, hinge side). This 15-minute survey is the single most useful diagnostic you can perform.

2. Mark the calendar and test again in 30 days. If only one door sticks and it is summer, wait. Seasonal wood expansion reverses on its own when humidity drops. If the door still sticks in October, or if additional doors begin sticking, the pattern points to foundation movement rather than wood swelling.

3. Schedule a PE inspection if two or more doors stick year-round. A licensed structural engineer inspection costs $300–$780 (HomeAdvisor, April 2025) and will confirm whether the frame distortion is caused by foundation movement. If piers are needed, typical push pier installation runs $1,000–$3,000 per pier (Angi/HomeAdvisor, 2025), with most homes requiring 5–10 piers.

When You Don't Need Repair

A single interior door that sticks only during summer months, returns to normal in fall, shows no visible cracks around the frame, and is not accompanied by any other sticking doors or windows is wood expansion from humidity. Save your money. This is especially common with solid-core wood doors in poorly ventilated bathrooms and bedrooms. Hollow-core doors are less susceptible because they have less solid wood to absorb moisture. If the sticking is seasonal and isolated to one door, planing the door edge by 1/16 inch solves the problem permanently. You do not need a foundation contractor, an engineer, or any structural repair for seasonal single-door sticking.

Related Issues to Check

• Gaps forming between walls and ceiling. When the foundation moves enough to rack door frames, the same movement separates wall-to-ceiling joints. A gap at the crown molding or ceiling line on the same wall as the sticking door confirms the house frame is shifting, not just one door swelling.

• Floor slope toward the sticking door. Place a marble or ball on the floor near the sticking door and observe which direction it rolls. Consistent roll toward the door indicates the floor has dropped on that side, explaining why the frame is out of square. Floor slope over 1 inch per 15 feet warrants investigation.

• Exterior brick cracks near the same wall. Stair-step cracks in brick veneer on the exterior of the same wall where interior doors stick links the interior symptom to exterior structural movement, ruling out humidity as the sole cause.

Frequently Asked Questions

Can doors stick without any foundation issues? Yes. Seasonal humidity causes solid wood doors to expand by as much as 1/8 inch across the grain. Loose hinge screws also allow the door to sag and bind. If tightening the top hinge screws with 3-inch screws into the stud fixes the sticking, there is no foundation involvement.

How do I tell if sticking is from humidity versus foundation movement? Check two things: count and timing. Humidity affects one door at a time and reverses with seasons. Foundation movement affects two or more doors, persists year-round, and usually comes with visible cracks around the frames. If multiple doors started sticking within the same month, that is not humidity.

Should I call a contractor now or wait? If only one door sticks and it is currently the humid season, wait through one full dry season. If two or more doors stick, or if you see diagonal cracks at door corners, call now — active differential settlement accelerates over time as soil conditions continue to change.

Are sticking doors worse in summer? Both causes are worse in summer. Wood expansion peaks with summer humidity. Foundation movement also peaks in summer because expansive clay soil (PI 35–70) loses moisture and shrinks during drought, causing settlement. The way to distinguish them is by counting how many doors are affected and whether exterior cracks accompany the sticking.

Last reviewed: March 2026 · Sources verified against current industry data

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