The Ontario Building Code | Materials
9.28.4.1. Materials
(1) Rib lath or expanded metal stucco mesh shall be,
(a) copper-alloy steel coated with rust-inhibitive paint after fabrication, or
(b) galvanized.
(2) Woven or welded wire mesh shall be galvanized.
In Plain Language
Materials for stucco lath must conform to the standards referenced in this article.
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.