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605 Confined Space Safety
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Crawl Spaces and Attics

Crawl spaces and attics can be both confined spaces and permit-required confined spaces under the new standard. For instance, working in an attic and applying a large amount of spray foam (or another chemical) in a short period of time can expose a worker to low oxygen levels or a hazardous atmosphere.

A crawl space is a good example of a potential confined space in construction.

Also, changes to the entry/exit, the ease of exit, and airflow could create a confined space or cause the space to become permit-required.

Hazards in Crawl Spaces and Attics

Crawl spaces can present many confined space hazards, including:

  • Atmospheric hazards (e.g., flammable vapors, low oxygen levels)
  • Electrocution (e.g., using electrical equipment in wet conditions, unprotected energized wires)
  • Standing water
  • Poor lighting
  • Structural collapse
  • Asbestos insulation
  • Heat/cold stress

Working in attics can also present confined space hazards, such as:

  • Atmospheric hazards (e.g., poor ventilation)
  • Heat/cold stress
  • Mechanical hazards (e.g., attic ventilators, whole house fans)
  • Electrical hazards (e.g., damaged or frayed wires, open electrical boxes)
  • Slip, trip and fall hazards
  • Asbestos insulation

Knowledge Check Choose the best answer for the question.

5-5. Which of the following hazards is typically found in crawl spaces?