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Formaldehyde: OSB

Understanding Formaldehyde in OSB Panels

APA oriented strand board (OSB) is manufactured using phenol formaldehyde or MDI (diphenylmethane di-isocyanate) adhesives. They are water proof, extremely stable and highly durable with very low formaldehyde emissions.

Download APA’s Formaldehyde and Engineered Wood Products.

OSB panels manufactured in accordance with US Voluntary Product Standard PS2 -18 easily meet the E1 formaldehyde emission limit of 0.124mg/m3 requirement of UK and European standards, EN 300 and EN 13986.  Also see how APA products meet requirements  of the Japanese Agricultural Standard (JAS) for Formaldehyde Emission and California Air Resource Board (CARB).

Japanese regulation for formaldehyde emissions from wood panels is widely considered the most stringent in the world. The JAS standards for plywood and Structural Panels (OSB) do not directly specify a limit for formaldehyde emissions.

However, panels meeting the F**** standard for formaldehyde emissions (the most stringent requirement level) are required to have an average emission level below 0.30mg/l as tested to Japanese Standard JIS A 1460.

APA member products  are exempt from the ‘Airborne Toxic Control Measure to Reduce Formaldehyde Emissions from Composite Wood Products’.  Section 93210 (c) (8) of the measure specifically states that this excludes:

  • Structural plywood as specified in the Voluntary Product Standard – Structural Plywood (PS 1-09)
  • Structural panels as specified in the Voluntary Product Standard – Performance Standard for Wood-Based Structural-Use Panels (PS 2-10 – sometimes designed by APA on its panels by APA’s own Performance-Rated Panel Standard – PRP 108)
  • Structural composite lumber (LVL) specified in Standard Specification for Evaluation of Structural Composite Lumber products (ASTM D 5456-06)
  • Oriented strand board
  • Prefabricated wood I-joists as specified in Standard Specification for Establishing and Monitoring Structural Capacities of prefabricated Wood I-Joists (ASTM D 5055-05).

The CARB regulation was used as the basis for the Federal (US National) Regulation that comes into effect in 2013, therefore, the same exemption exists for the Federal (US National) formaldehyde provisions.