Section Contents

Understanding Formaldehyde in OSB Panels

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

The European standard for formaldehyde release is given in EN 3001 and Annex B of the harmonised standard for wood-based products EN 139862.  Both standards reference EN 717-13 test methodology for the initial type testing using a formaldehyde test chamber, and for the factory production control, the use of EN 1204.

OSB manufactured in accordance with US Voluntary Product Standard PS2 easily meet the E1 formaldehyde emission limit of 0.124mg/m3 requirement of EN 300 and EN 13986.

1   EN 300 : Oriented Strand Boards (OSB) – Definitions, classification and specifications
2  EN 13986 : Wood-based panels for use in construction – Characteristics, evaluation of conformity and marking
3  EN 717-1 : Wood-based panels – Determination of formaldehyde release – Formaldehyde emission by the chamber method
4  EN 120: Wood-based panels – Determination of formaldehyde content – Extraction method called the perforator method.