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Simulation Tests to Assess Occupational Exposure to Airborne Asbestos from Artificially Weathered Asphalt-Based Roofing Products
Abstract
Historically, asbestos-containing roof cements and coatings were widely used for patching and repairing leaks. Although fiber releases from these materials when newly applied have been studied, there are virtually no useful data on airborne asbestos fiber concentrations associated with the repair or removal of weathered roof coatings and cements, as most studies involve complete tear-out of old roofs, rather than only limited removal of the roof coating or cement during a repair job. This study was undertaken to estimate potential chrysotile asbestos fiber exposures specific to these types of roofing products following artificially enhanced weathering. Roof panels coated with plastic roof cement and fibered roof coating were subjected to intense solar radiation and daily simulated precipitation events for 1 year and then scraped to remove the weathered materials to assess chrysotile fiber release and potential worker exposures. Analysis of measured fiber concentrations for hand scraping of the weathered products showed 8-h time-weighted average concentrations that were well below the current Occupational Safety and Health Administration permissible exposure limit for asbestos. There was, however, visibly more dust and a few more fibers collected during the hand scraping of weathered products compared to the cured products previously tested. There was a notable difference between fibers released from weathered and cured roofing products. In weathered samples, a large fraction…
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“asbestos-containing floor tiles (Lange, 2002) and roofing materials (Sheehan, Mowat, Weidling, & Floyd, 2010) have not been shown to create elevated levels of airborne asbestos during abatement and scraping, respectively.”
From Asbestos-containing materials in abandoned residential dwellings in Detroit (2020) · cites this paper as Sheehan et al., 2010
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Cited by
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Asbestos-containing materials in abandoned residential dwellings in Detroit
Franzblau, A., Demond, A. H., Sayler, S. K., D'Arcy, H., & Neitzel, R. L. (2020) · Science of The Total Environment · doi:10.1016/j.scitotenv.2020.136580 · Cited by 20
“Previous research has shown a low probability of elevated exposures to asbestos after abatement and scraping of nonfriable materials such as asbestos-containing floor tiles (Lange, 2002) and roofing materials (Sheehan et al., 2010).”
Background
Metadata
- Authors
- Sheehan, P. J., Mowat, F. S., Weidling, R., & Floyd, M.
- Affiliations
- Exponent (United States) (US)
- Corresponding author
- Patrick J. Sheehan
- ORCID
- Fionna S. Mowat
- Venue
- The Annals of Occupational Hygiene
- Publisher
- Oxford University Press (OUP)
- Published
- 2010-10-05
- Volume
- 54
- Issue
- 8
- Pages
- 880-92
- ISSN
- 0003-4878 (ISSN-L)
- 1475-3162
- OpenAlex
- W2147880872
- Cited by
- 4
- References
- 0
- Citations by year
- 2021: 1 · 2020: 1 · 2018: 1 · 2016: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Annals of Occupational Hygiene (publishedVersion)
- PubMed (publishedVersion)
- HighWire Press Open Archive (submittedVersion)
- Topics
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Occupational and environmental lung diseases
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Occupational Health and Safety in Workplaces
- Social Sciences › Health › Occupational Health and Global Justice
- Keywords
- chrysotile, occupational exposure, fiber release, magnesium leaching, roof repair, simulated weathering, OSHA exposure limits
- MeSH terms
- Air Pollutants, Occupational, Construction Materials, Dust, Environmental Monitoring, Humans, Hydrocarbons, Magnesium, Microscopy, Phase-Contrast, Models, Chemical, National Institute for Occupational Safety and Health, U.S., United States, Weather, Occupational Exposure, Asbestos, Serpentine, Risk Assessment, Mineral Fibers, Microscopy, Electron, Transmission
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- CoChat. (2026). Citation check: Simulation Tests to Assess Occupational Exposure to Airborne Asbestos from Artificially Weathered Asphalt-Based Roofing Products. https://app.cochat.ai/papers/10.1093/annhyg/meq058
- The paper
- Sheehan, P. J., Mowat, F. S., Weidling, R., & Floyd, M. (2010). Simulation Tests to Assess Occupational Exposure to Airborne Asbestos from Artificially Weathered Asphalt-Based Roofing Products. The Annals of Occupational Hygiene. https://doi.org/10.1093/annhyg/meq058
