The Ontario Building Code | Low Temperature Conditions
9.28.6.1. Low temperature Conditions
(1) The base for stucco shall be maintained above freezing.
(2) stucco shall be maintained at a temperature of not less than 10°C during application and for not less than 48 h afterwards.
In Plain Language
Stucco application in low temperature conditions requires the precautions set out in this article, since cold weather can prevent proper curing.
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.