Not much use for flooring in an upstairs bathroom - if you have a water leak
!
Over here in Wales we do have what is called "flooring grade chipboard " -
usually T&G - but it is definitely not strong when wet. Neverthe less , it
gets used a hell of a lot.
Geoff.
From an engineering perspective, I'd say that
particleboard is fine for
carrying loads in the right circumstances, but it is
incumbent upon the
designer to know what those circumstances are and design accordingly.
Building codes (which were cited in support of the notion) tend to be
conservative, and (especially given the likely blind substitution of
particleboard for plywood) I'm not surprised they take the tack
described.
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