One disadvantage related to the adhesives used in engineered lumber is that they may emit what?

• A. Non-toxic fumes
• B. Pleasant odors
• C. Toxic gases
• D. Water vapor

Answer: (C)

Adhesives used in engineered lumber can off-gas volatile organic compounds, especially formaldehyde, which is a toxic gas. This release can affect indoor air quality, causing eye, nose, and throat irritation and raising health concerns with long-term exposure, particularly in enclosed spaces. Some older resin systems released higher levels of formaldehyde, though many modern products now use low-emission or formaldehyde-free formulations. The idea that the emissions would be non-toxic fumes isn’t accurate, and a pleasant odor isn’t a reliable indicator of safety. Water vapor isn’t the typical emission from the adhesive itself. So, the real disadvantage is the potential emission of toxic gases.