The Ontario Building Code | Downspouts
9.14.6.5. Downspouts
(1) Downspouts shall conform to Article 9.26.18.2.
Section 9.15. footings and foundations
9.15.1. application
In Plain Language
Downspouts must discharge as set out in this article, directing roof runoff away from the foundation rather than letting it saturate the soil right next to the building.
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.