When does OSHA not require the use of wet methods for roofing work?

The requirement for the use of wet methods in roofing work involving asbestos is primarily aimed at minimizing fiber release into the air during abatement activities. OSHA regulations stipulate that when asbestos is encapsulated or removed in limited quantities, such as when dealing with small areas, alternative methods may be permissible.

In this context, the regulation specifies that the use of wet methods is not required when the area being removed is less than 25 square feet. This size threshold is significant because it indicates that smaller amounts of asbestos may not generate enough airborne fibers to pose a significant risk to workers and occupants, provided that proper containment and safety procedures are still followed.

Understanding the rationale behind this threshold helps clarify why larger areas, such as those greater than 25 square feet, would necessitate more stringent control measures, including wet methods, to better control the inhalation risks associated with asbestos fibers.