This Safety and Health Information Bulletin is not a standard or regulation, and it creates no new legal obligations. The Bulletin is advisory in nature, informational in content, and is intended to assist employers in providing a safe and healthful workplace. Pursuant to the Occupational Safety and Health Act, employers must comply with hazard-specific safety and health standards and regulations promulgated by OSHA or by a state with an OSHA-approved state plan. In addition, pursuant to Section 5(a)(1), the General Duty Clause of the Act, employers must provide their employees with a workplace free from recognized hazards likely to cause death or serious physical harm.
Throughout the roofing industry, adhesives are used to glue membranes in place on a roof. Adhesives are spread onto the roofing deck using devices, such as sprayers or rollers. During an inspection, the Occupational Safety and Health Administration’s (OSHA) area office in Concord, New Hampshire, identified a dolly-type roller device that must not be used for spreading flammable liquid adhesives (Figure 1). The device (or equipment) does not meet the agency’s requirements for dispensing a flammable liquid and it was used in a way that creates a fire hazard to workers.
The dolly-type roller device and the adhesive are manufactured by different companies and are sold separately. The device is designed to spread the liquid adhesive directly onto the roof from its 5-gallon metal container (Figure 2). The manufacturer of the device instructs users to lay the adhesive container on its side (horizontally), punch a row of holes along the center, clamp the container to the dolly, and turn it over, so that the adhesive flows through the holes to the roller to be spread onto the roof.
"Approved" means listed or approved by a Nationally Recognized Testing Laboratory (29 CFR 1910.106(a)(35)) such as:
OSHA does not approve containers or equipment.
The adhesive used at this roofing job site was a toluene-based liquid. The Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS)1 for the adhesive states that it is flammable and warns users not to cut, drill, grind, or weld near full, partially full or empty adhesive containers. The product information instructs users to apply the adhesive using a nine-inch, medium-nap roller (back rolling of the adhesive is required) or with an approved spraying equipment or power roller equipment.
Punching holes in the storage container using an electric drill or hand tools such as drills, screwdrivers, or punches can create sparks and heat, introducing sources of ignition. Sparks or heat can ignite the flammable adhesive and start a fire. The dolly-type device does not have an approved self-closing or shutoff system. As a result, the flammable adhesive will continue to flow from the holes in the container and add fuel to the fire, putting workers at risk of being trapped on the rooftop with only a limited number of exits.
Static electricity can also create sparks. Static electricity is common when the humidity is low, such as during the winter. A spark can be created under some conditions, for example, just by shuffling the feet across the rooftop and then touching a metal screw or plate. Static electricity can also build-up as a flammable liquid flows from its container and by the movement (rubbing together and separation) of certain types of clothing. For example, clothing made of one hundred percent silk, polyester, wool or nylon is highly static producing.
While the risk of starting a fire (physical hazard2) is the focus of this Safety and Health Information Bulletin (SHIB), roofers should also be aware that roofing adhesives may contain chemicals with health hazards, for example, toluene. Workers may be exposed if they breathe the vapors into their lungs, or if the adhesive gets into their eyes or on their skin. A worker may be accidentally exposed by touching their face, or eating, or drinking after handling adhesives without first washing his or her hands. In addition, there is always a risk of falling when working at a height. Increasing this risk is the fact that surfaces coated with adhesives can be slippery.
Do not use a dolly-type roller device like the one described in this SHIB to dispense flammable liquid adhesives, due to the risk of starting a fire. If a flammable liquid adhesive is used, the employer must ensure that it is drawn from containers and spread onto the rooftop with an approved closed system/device. In addition to the risk of starting a fire, roofing adhesives may also contain chemicals with health hazards. Workers must be trained on all the hazards of the chemicals they use and the correct safety measures that will protect them. Workers must also be protected from the hazard of falling from a height when working on a rooftop (as applicable).
The resources listed below provide additional information on flammable liquids, fire prevention and control, air contaminants, hazard communication, and the use of PPE.
OSHA's On-site Consultation Program offers free and confidential advice to small and medium-sized businesses in all states across the country, with priority given to high-hazard worksites. On-site Consultation services are independent of OSHA enforcement and do not result in penalties or citations. Consultants from state agencies or universities work with employers to identify workplace hazards, provide advice on compliance with OSHA standards, and assist in establishing safety and health management systems. To locate the OSHA On-site Consultation office in your state, call 1-800-321-OSHA (6742) or visit OSHA's Consultation web page.
OSHA Approved State Plans: Twenty-seven states and U.S. territories operate their own occupational safety and health state plan approved by OSHA. State plans have Hazard Communication standards that are at least as effective as OSHA's standards in providing protection to workers. A list of state plans and more information about each state plan's Hazard Communication standard is available.
OSHA Compliance Assistance: OSHA’s compliance assistance specialists throughout the nation provide information to employers and workers about OSHA standards, rights and responsibilities under the Occupational Safety and Health Act, present short educational programs on special hazards and help with other compliance assistance resources. Contact your local OSHA office for more information by calling 1-800-321-OSHA (6742) or visit OSHA's web page at www.osha.gov.
Workers have the right to:
For more information, see OSHA's web page for workers.
For questions or to get information or advice, to report an emergency, report a fatality or catastrophe, file a confidential complaint, order publications, or to request OSHA's free On-site Consultation service, contact your nearest OSHA office, visit www.osha.gov, or call OSHA at 1-800-321-OSHA (6742), TTY 1-877-889-5627.
1 OSHA’s Hazard Communication standard was revised in 2012. Safety Data Sheets (SDSs) will replace MSDSs. SDSs have a standardized 16-section format with specific information required in each section. Manufacturers and importers have until June 1, 2015, to replace MSDSs with SDSs; until then either MSDSs or SDSs may be received by employers.
2 A physical hazard means a chemical that is classified as posing one of the following hazardous effects: explosive; flammable (gases, aerosols, liquids, or solids); oxidizer (liquid, solid or gas); self-reactive; pyrophoric (liquid or solid); self-heating; organic peroxide; corrosive to metal; gas under pressure; or in contact with water emits flammable gas. See Appendix B to 1910.1200 — Physical Hazard Criteria (29 CFR 1910.1200).
3 A hazardous chemical means any chemical which is classified as a physical hazard or a health hazard, a simple asphyxiant, combustible dust, pyrophoric gas, or hazard not otherwise classified (29 CFR 1910.1200).
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