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What to do if…
an exterior wall shows a new bulge or bowing section

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

A new bulge or bow in an exterior wall could indicate a serious safety problem. Keep people and pets away from the wall, and arrange urgent professional assessment. If material is falling, the wall is visibly moving, you hear unusual noises, or you think collapse may be possible, leave the building and call 911 from a safe location.

Do not do these things

  • Don’t press on the wall, lean a ladder against it, or test whether it feels solid.
  • Don’t remove masonry, stucco, or siding, drill into the wall, or attempt DIY bracing.
  • Don’t stand under or close to the bulging section to inspect it or take photos.
  • Don’t keep using nearby rooms if material is falling, the wall is moving, or unusual noises are continuing.
  • Don’t re-enter the building after leaving because of collapse concerns until responders or a qualified professional say it is safe.

What to do now

  1. Create distance immediately. Move people and pets away from the outside area below and beside the bulge. Move away from rooms directly next to the affected wall.
  2. Leave the building if there are active warning signs. Leave promptly if material is falling, the wall is visibly moving, unusual noises are continuing, or you think collapse may be possible. Move away from the affected side of the building and call 911 from a safe location.
  3. Treat any possible gas leak as urgent. If you smell gas or hear gas leaking, leave immediately. Do not operate lights, electronics, or phones before leaving. From a safe location, call 911. Then notify the gas utility’s emergency line if you know it.
  4. Keep others out of the area. Warn household members and visitors not to approach the affected wall. Keep people away from any sidewalk, driveway, yard area, or neighboring space that could be reached by falling material.
  5. Notify the responsible party once you are safe.
    • If you rent, contact the landlord or property manager and state that there is a new exterior wall bulge or bow and a possible structural safety concern.
    • If the property is managed by a condo association or HOA, notify the management contact.
  6. Arrange urgent assessment. Ask for a professional engineer licensed in your state who has relevant structural experience to assess immediate stability and safe next steps. You can use your state engineering licensing board to check licensure.
  7. Contact local authorities if the risk extends beyond the property. If the affected area could endanger a sidewalk, street, neighboring property, or shared space, call 911 for an immediate danger. For a non-immediate concern, contact local government and ask for the office that handles building-safety or code-enforcement reports.
  8. Take limited photos only if it is safe. After reaching a safe location, take photos from a distance only if you can do so without approaching the wall or delaying urgent calls. Record when you first noticed the change and whether there was recent rain, freezing weather, construction, excavation, remodeling, or impact.

What can wait

  • You do not need to work out the cause right now.
  • You do not need to choose a repair method, start demolition, or sign a repair contract before the safety assessment.
  • You do not need to decide who is responsible before the area is safe.
  • You can notify your homeowners, condo, or renters insurer after the immediate safety steps and follow its instructions about documentation.
  • You do not need to move belongings from the affected area if doing so would bring you near the wall.

Important reassurance

Noticing the change and creating distance is a sensible response. You do not need to diagnose the problem yourself. The immediate priorities are to reduce exposure, get away from active warning signs, and arrange qualified assessment.

Scope note

These are first steps only. Repair planning, insurance questions, responsibility, and any longer-term decisions may need help from an appropriately qualified professional.

Important note

This is general information, not structural, legal, medical, financial, insurance, therapeutic, or other professional advice. Conditions can change. If you think collapse is possible or anyone may be at risk, leave the area and call 911 from a safe location.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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