Dampproofing Materials

(1)  Materials installed to provide required dampproofing shall be,

    (a)   capable of protecting assemblies against moisture transfer from the ground,

    (b)   compatible with adjoining materials, and

    (c)   resistant to mechanisms of deterioration that may reasonably be expected, given the nature, function and exposure of the materials.

    (2)  Except as otherwise specified in this Section, materials used for exterior dampproofing shall,

    (a)   conform to one of the following standards:

             (i)   ASTM D1227 “Emulsified Asphalt Used as a Protective Coating for Roofing”, Type III, Class I,

            (ii)   ASTM D4479 / D4479M, “Asphalt Roof Coatings – Asbestos-Free”, Type III,

           (iii)   CAN/CGSB-51.34-M, “Vapour Barrier, Polyethylene Sheet for Use in Building Construction”, or

           (iv)   CAN/CSA-A123.4, “Asphalt for Constructing Built-Up Roof Coverings and Waterproofing Systems”, or

    (b)   have a water vapour permeance of not more than 43 ng/Pa•s•m² when tested in accordance with Procedure A (wet cup) of ASTM E96 / E96M, “Water Vapor Transmission of Materials”, and consist of one of the following material types:

             (i)   a vapour-resistant coating,

            (ii)   a cold-fluid-applied or hot-rubberized bituminous dampproofing membrane,

           (iii)   a liquid-applied or spray-applied asphalt-based emulsion dampproofing, or

           (iv)   a Type III hot-applied asphalt.

Article 9.13.2.2 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.