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us Home & property emergencies crack around window widening • crack around door frame widening • large wall crack getting bigger • sudden structural crack indoors • diagonal crack by window • door frame crack spreading • wall moving around openings • drywall crack widening fast • foundation shift signs • house movement signs • floor feels uneven suddenly • doors sticking after crack • loud pop then crack appeared • worried house is unsafe • possible structural damage • possible settling crack • new gap around frame • crack keeps widening overnight

What to do if…
a large crack appears around a window or door frame and keeps widening

Short answer

Treat a widening crack around a door/window as a possible structural hazard: keep people away from that area, and if you think collapse could be possible, leave the building and call 911.

Do not do these things

  • Do not force the door or window if it’s sticking or the frame looks distorted.
  • Do not remove drywall, brick, trim, or any part of the wall/ceiling to “look inside”.
  • Do not patch, mud, or paint over the crack as a first response (it can hide rapid change).
  • Do not keep heavy furniture, stacked items, or ladders against the affected wall.
  • Do not stay inside out of embarrassment or uncertainty if you feel unsafe — safety first.

What to do now

  1. Make a safer pause. Move everyone (and pets) away from the cracked opening and the rooms above/below it if you can. Keep clear of the wall, window/door, and anything that could fall.
  2. Decide if this is an immediate emergency. Leave and call 911 if any apply:
    • The crack is widening noticeably over minutes/hours, or you hear ongoing popping/creaking.
    • The wall/ceiling is bulging, bowing, sagging, or shedding debris.
    • The frame is visibly racked/out of square, or the opening looks like it’s deforming.
    • Floors suddenly slope, feel soft, or seem unstable near the crack.
  3. If there’s any utility danger: if you smell gas, hear hissing, see sparking/wet electrical areas, or have water actively undermining the area, prioritize leaving and getting emergency help (call 911 if life safety is at risk; otherwise follow your utility’s emergency instructions once you’re in a safe place).
  4. Minimize load and vibration (without attempting repairs). If it’s safe to be inside briefly, stop anything that shakes the structure near the crack (running appliances, heavy activity upstairs). Keep children away and don’t move heavy items across that area.
  5. Document quickly, then stop. Take photos/video with something for scale (coin/ruler). Note the time and whether it’s changing. If safe, lightly pencil-mark the crack ends so you can tell if it grows.
  6. Contact the systems that can act quickly:
    • Homeowner: notify your home insurance provider about potential structural damage and ask what documentation/inspection they need before work begins.
    • Renter: notify your landlord/property manager immediately in writing (text/email) and request an urgent safety inspection/repair.
    • If the building may be unsafe for occupants or the public: contact your city/county building department or code enforcement to report an unsafe structure. Some places route these reports through a city services line (often called “311”), but it varies by location.
  7. Arrange an independent assessment. Get a licensed structural engineer (or a qualified building inspector/engineer) to evaluate the cause and whether any parts are unsafe, especially before agreeing to major work.

What can wait

  • You do not need to diagnose the cause right now (foundation movement, framing issue, header/lintel problem, moisture, etc.).
  • You do not need to commit to a repair contractor, foundation system, or window/door replacement until you’ve had a proper assessment (and, if applicable, insurer guidance).
  • You do not need to cosmetically fix the crack today.

Important reassurance

A widening crack near a door or window is genuinely unsettling — it can feel like the house is “failing.” Taking calm safety steps, documenting changes, and getting the right local inspection pathway involved is exactly what you’re supposed to do.

Scope note

This is first-steps guidance to reduce immediate risk and prevent irreversible mistakes. Follow-up decisions should be based on a qualified on-site inspection and (if relevant) insurer requirements.

Important note

This is general information, not a diagnosis or a substitute for an on-site structural evaluation. If you believe there is immediate danger, leave and call emergency services.

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