The Ontario Building Code | Panel Thickness Tolerances
9.3.2.7. panel Thickness Tolerances
(1) The thickness specified in this Part for plywood, hardboard, particleboard, OSB and waferboard shall be subject to the tolerances permitted in the standards referenced for these products unless specifically indicated in this Part.
In Plain Language
This clause allows normal manufacturing tolerances for panel product thickness (plywood, hardboard, particleboard, OSB, waferboard) as permitted under each product's own referenced standard, unless this Part specifically overrides that with its own number.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.