Demolition Exclusion Zones

Exclusion zones are controlled areas around demolition activities where unauthorised persons must not enter.
Falling debris, structural collapse, and uncontrolled material ejection make demolition zones lethally dangerous.
The exclusion zone size must be determined by the demolition method, building height, and potential collapse radius.
Physical barriers including Heras fencing, jersey blocks, and hoarding must define the exclusion zone boundary clearly.
Warning signs at all entry points must state that demolition is in progress and unauthorised entry is prohibited.
A banksman or marshal must control access at any entry point used by demolition plant and authorised personnel.
The exclusion zone must extend to protect the public on adjacent footpaths, roads, and neighbouring property.
Overhead protection such as crash decks or fans may be needed where debris could fall onto public areas.
The exclusion zone must be reviewed and adjusted as demolition progresses and the risk profile changes.
Emergency services must be able to access the exclusion zone — routes must be planned and kept clear at all times.

Falling debris kills	Material ejected during demolition travels unpredictably — anyone within the exclusion zone is at risk of fatal impact.
Structural collapse	Buildings can collapse suddenly beyond the expected footprint — the exclusion zone provides a safety margin for the unexpected.
Public protection	Demolition sites adjoin public streets, footpaths, and properties — the exclusion zone is the barrier protecting the community.

Do

Don't

Establish exclusion zones based on the demolition method, height, and collapse radius.
Install physical barriers at the exclusion zone boundary using fencing, blocks, or hoarding.
Post warning signs at all entry points stating demolition is in progress.
Control access with a banksman or marshal at every active entry point.
Extend the zone to protect public footpaths, roads, and neighbouring properties.
Install overhead protection where debris could fall onto public access routes.
Review and adjust the exclusion zone as demolition progresses and conditions change.
Ensure emergency vehicle access routes are planned and maintained throughout.
Brief all site workers on the exclusion zone boundaries before demolition begins.
Monitor the exclusion zone continuously for unauthorised entry during active demolition.

DON'T set exclusion zones without considering the demolition method and collapse radius.
DON'T rely on tape alone — use substantial physical barriers to define the zone.
DON'T allow gaps in signage — every entry point must be clearly marked.
DON'T permit uncontrolled access — a marshal must manage every active entry point.
DON'T forget public protection — footpaths and roads may need closures or diversions.
DON'T omit overhead protection where falling debris could reach public areas.
DON'T keep the same zone throughout — adjust it as the demolition sequence progresses.
DON'T block emergency access routes with barriers, plant, or demolition debris.
DON'T assume workers know the boundaries — brief everyone before each phase begins.
DON'T enter the exclusion zone without authorisation and the correct PPE for demolition.

See also: Demolition Safety Awareness | Dust & Noise Control in Demolition

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