The Ontario Building Code | Required Venting

9.19.1.1. Required venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting

(1) Except where it can be shown to be unnecessary, where insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation is installed between a ceiling and the underside of the roof sheathing, a space shall be provided between the insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation and the sheathing, and vents shall be installed to permit the movement of air from the space to the exterior.