VOC Considerations for Asphalt Roofing
Asphalt Roofs Can Meet VOC Requirements
While volatile organic compound (VOC) regulations have tightened over the years, asphalt roofing products have kept pace. Asphalt roofing products and the coatings and adhesives used in the installation and maintenance of these roof systems continue to provide long-term performance on the roof while achieving compliance with the wide variety of VOC regulations that exist throughout North America.
Background on VOC Regulations
When in contact with sunlight, nitrogen oxides (NOx) and VOCs may combine to produce ozone. The National Ambient Air Quality Standards (NAAQS), and specifically the ozone NAAQS, outline the acceptable levels of ozone. A region in which ground-level ozone is found to exceed the NAAQS is said to be in “nonattainment.” Once a state or region is found to be in nonattainment, that area is required to submit a State Implementation Plan (SIP) outlining the regulatory actions that will be taken to come into attainment.
Those regions and states in nonattainment often employ VOC regulations as part of their air quality management program to achieve lower ground-level ozone concentrations. In several areas of the country where there is widespread nonattainment, such as California and the northeastern United States, regulatory bodies suggest model rules for governing VOCs. These model rules can be adopted locally by states and regional districts as part of their ozone-reduction programs. Additionally, the United States Environmental Protection Agency (EPA) has the authority to publish VOC regulations for certain product types that become applicable across the country.
Primary Rules Affecting Roofing Products
The main regulations affecting the installation and maintenance of asphalt roofing systems are the Architectural and Industrial Maintenance (AIM) Coatings Rules and the Adhesive & Sealants Rules. Although regulations affecting these products may be introduced anywhere in the US, there are geographic areas that have historically had high levels of VOC regulatory activity. Regulatory bodies for these areas include:
- California Air Resources Board (CARB)
CARB is the regulatory body that oversees California’s state-wide air quality initiatives and guides the regulatory activities of its 35 local air districts. In the case of AIM Coatings, CARB publishes “suggested control measures” (SCMs) that the air districts may choose to adopt as part of their air quality compliance efforts.
- Ozone Transport Commission (OTC)
Comprised of the northeast states that are included in the EPA-designated Ozone Transport Region (OTR), the OTC publishes Model Rules that participating states typically use as a template for their state or regional air quality regulations.
- Lake Michigan Air Directors Consortium (LADCO)
LADCO encompasses the Great Lakes-area states. LADCO typically does not draft its own model rules, but recommends to its participating states that they use the OTC Model Rules.
- South Coast Air Quality Management District (SCAQMD)
One of the air districts in California, the Los Angeles-area SCAQMD is typically at the forefront of creating and implementing new VOC regulations. The VOC content limits and breadth of VOC regulations in the SCAQMD far exceed those of anywhere else in the country; additionally, SCAQMD regulations typically serve as a precursor to future CARB SCMs and OTC Model Rules.
Complying with VOC Regulations
When a state or air district adopts a VOC rule, they have the choice to adopt a model rule as written, to make certain modifications to a model rule, or to create an entirely new rule. Therefore, it is essential that you work with the manufacturer of your asphalt roofing products to ensure that the system being specified will comply with all federal, state, and local VOC regulations.
Asphalt roofing manufacturers continue to make developments to their products to ensure the effectiveness and longevity of each roofing system while also minimizing their potential impact on the environment. With ever-changing air quality regulations, asphalt roofing manufacturers have many years of experience ensuring that products can comply with new regulations without sacrificing those products’ proven long-term performance in a broad range of climatic regions.
Contact an ARMA Member today to hear more on the latest VOC-compliant product innovations available for your location.
*DISCLAIMER OF LIABILITY: This document was prepared by the Asphalt Roofing Manufacturers Association and is disseminated for informational purposes only. Nothing contained herein is intended to revoke or change the requirements or specifications of the individual roofing material manufacturers or local, state and federal building officials that have jurisdiction in your area. Any question, or inquiry, as to the requirements or specifications of a manufacturer, should be directed to the roofing manufacturer concerned. THE USER IS RESPONSIBLE FOR ASSURING COMPLIANCE WITH ALL APPLICABLE LAWS AND REGULATIONS.
Nothing contained herein shall be interpreted as a warranty by ARMA, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose or non-infringement. IN NO EVENT SHALL ARMA BE LIABLE FOR ANY DAMAGES WHATSOEVER, including special, indirect, consequential or incidental damages or damages for loss of profits, revenue, use or data, whether claimed in contract, tort or otherwise. Where exclusion of implied warranties is not allowed, ARMA’s liability shall be limited to the minimum scope and period permitted by law.