Composite wood products must meet new federal formaldehyde emissions regulations as of June 1, 2018. The U.S. Environmental Protection Agency (EPA) regulation defines composite wood products as particleboard, medium density fiberboard (MDF), and hardwood (decorative) plywood. These products are required to be certified as compliant with the new regulation, which intends to ensure that all domestic and imported composite wood panels, and the finished products containing them, meet the world’s most stringent standards for formaldehyde emissions. Exemptions to the Regulation – Structural engineered wood products manufactured for construction applications, such as structural plywood, oriented strand board (OSB), wood I-joists, laminated veneer lumber, and glued-laminated timber, are exempt from the regulation. These products are manufactured using low emitting, moisture-resistant adhesives, per the strict product standards and building codes that govern them.