The Ontario Building Code | Location and Installation of Materials Providing Thermal Resistance
220.127.116.11. Location and installation of Materials Providing Thermal Resistance
(1) Where a material required by Article 18.104.22.168. is intersected by a buildingassembly, penetrated by a high conductance component or interrupted by expansion, control or construction joints, and where condensation is likely to occur at these intersections, penetrations or interruptions, sufficient thermal resistance shall be provided so as to minimize condensation at these locations.
(2) Materials providing required thermal resistance shall have sufficient inherent resistance to air flow or be positioned in the assembly so as to prevent convective air flow through and around the material.
(3) Spray-in-place polyurethane insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation shall be installed in accordance with the requirements of CAN/ulc-S705.2, "Thermal insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation - Spray Applied Rigid Polyurethane Foam, Medium Density, Installer’s Responsibilities - Specification".
Section 5.4. Air Leakage
5.4.1. Air Barrier Systems