How Durable Is Particleboard?

Protected and unprotected specimens of Douglas-fir flakeboard of various densities and containing different types and amounts of binders were tested after 1, 2, and 3 years of outdoor exposure. Similar specimens were given the ASTM accelerated aging test. Results indicate most deterioration in unprotected specimens occurs the first year, and longer exposure had relatively little effect on properties. Specimens that were painted or contained wax were more durable than similar unprotected specimens. Phenolic-resin binders were more durable than urea or urea-melamine binders. Longer outdoor exposures are needed to determine whether the ASTM test is comparable to exterior exposures.

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