Materials and Thickness Panel-type underlay

(1)  Panel-type underlay shall be not less than 6 mm thick and shall conform to,

    (a)   ANSI A208.1, “Particleboard”,

    (b)   CAN/CGSB-11.3-M, “Hardboard”,

    (c)   ANSI/HPVA HP-1, “Hardwood and Decorative Plywood”,

    (d)   CSA O121, “Douglas Fir Plywood”,

    (e)   CSA O151, “Canadian Softwood Plywood”,

    (f)   CSA O153, “Poplar Plywood”, or

    (g)   CSA O437.0, “OSB and Waferboard”.

Article 9.30.2.1. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.