The Ontario Building Code | Elements of the Second Plane of Protection

9.27.3.1. Elements of the Second Plane of Protection

(1) The second plane of protection shall consist of a drainage plane with appropriate inner boundary and flashing to dissipate rainwater to the exterior.

(2) The inner boundary of the drainage plane shall comply with,

(a) Articles 9.27.3.2. to 9.27.3.6., or

(b) Subsection 9.27.13.

(3) The protection provided by the second plane of protection shall be maintained,

(a) at wall penetrations created by the installation of components and services such as windows, doors, ventilation ducts, piping, wiring and electrical outlets, and

(b) at the interface with other wall assemblies.

(4) Flashing material and installation shall comply with Articles 9.27.3.7. and 9.27.3.8.