The Ontario Building Code | Material Alteration or Repair of a Building System
11.3.1.1. Material Alteration or Repair of a building System
(1) Where an existing building system is materially altered or repaired, the performance level of the building after the material alteration or repair shall be at least equal to the performance level of the building prior to the material alteration or repair.
In Plain Language
Material alteration or repair of a building system must meet the requirements set out in this article, addressing when renovation work triggers additional compliance obligations for that system.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.