Demolition looks simple and hides serious hazards. Here is how to plan it safely.
In this article
Why demolition is risky
Demolition removes walls, floors and structures that may be carrying loads nobody expected. Hidden utilities, hazardous materials and unstable sections create serious risks. Planning is what separates a controlled job from an accident.
Engineering survey
OSHA requires an engineering survey by a competent person before demolition starts. It assesses the structure's condition and the possibility of unplanned collapse.
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Utilities off
Electric, gas, water and other utilities must be shut off, capped or controlled before work starts.
Hazardous materials
Asbestos, lead and other materials must be identified and handled before demolition.
Structural stability
Know which elements are load-bearing. Shore or brace when needed.
Sequence
Demolish in a planned order, usually from the top down. Write it down.
Debris management
Chutes, dumpsters and floor load limits prevent overloading floors and falling debris.
Dust and noise
Control dust with water and containment, especially in occupied buildings.
Permits
Demolition often needs permits and notifications.
Toolbox talk
"Before anyone cuts a wall today, confirm the electrician marked it dead and check the plan for load-bearing walls."
Common mistakes
Skipping the survey, assuming utilities are off and overloading floors with debris.
Where to start
Add a demolition checklist to every renovation: survey, utilities, hazardous materials and sequence, signed before the first cut.
Occupied buildings
In tenant improvements and renovations, people may be working next door. Plan containment, noise windows and safe routes before demolition starts, and tell neighbors what to expect.
Know your numbers
Track surprises found during demolition and the days they cost. That history improves future surveys and estimates.
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Frequently asked questions
Is an engineering survey required before demolition?
OSHA's construction demolition rules require an engineering survey by a competent person before demolition begins, to determine the condition of the structure and possible collapse risks.