Friable Asbestos
Friable asbestos refers to any asbestos-containing material that can be crumbled, pulverized, or reduced to powder by hand pressure. Friable materials release asbestos fibers into the air easily, creating the highest risk of inhalation exposure. Spray-on insulation, pipe lagging, and acoustical plaster are common friable asbestos products.
The friability of an asbestos-containing material determines how easily it can release dangerous fibers into the air. Friable materials pose the greatest health risk because normal activities — bumping, vibration, air movement, or deterioration over time — can release invisible microscopic fibers. Once airborne, these fibers can be inhaled and cause mesothelioma, asbestosis, and lung cancer.
Common friable asbestos products include spray-applied fireproofing and insulation, pipe and boiler lagging, acoustical ceiling tiles, and loose-fill vermiculite insulation. Workers who installed, maintained, or removed these materials faced the highest levels of occupational exposure, and their family members may have experienced secondary exposure from contaminated work clothing.
Federal law (EPA NESHAP regulations) strictly governs the handling and removal of friable asbestos materials. Professional asbestos abatement is required before any renovation or demolition that may disturb friable materials. In contrast, non-friable asbestos materials remain less hazardous as long as they are intact and undisturbed.
- Also known as
- Crumbleable asbestos, Category I nonfriable/Category II nonfriable (regulatory terms for non-friable)
- Category
- Asbestos
- Related terms
- Non-Friable Asbestos, Asbestos Abatement, Occupational Exposure, Chrysotile, Secondary Exposure
What makes asbestos friable?
Asbestos is friable when the material can be crumbled or reduced to powder by hand pressure, allowing fibers to become airborne and inhaled easily.
What are examples of friable asbestos materials?
Common friable asbestos products include spray-applied fireproofing, pipe and boiler lagging, acoustical ceiling tiles, and loose-fill vermiculite insulation.
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