Cold-Weather Masonry
Masonry in cold weather: the Building Code's 5°C for 48 hours rule, no frozen materials, covering unfinished work, and frost marks in mortar
What temperature is too cold for mortar work in Ontario?
Mortar work is too cold under Ontario's Building Code (9.20.14.1) when this rule cannot be met: mortar and masonry shall be maintained at a...
Is November too late for repointing in Ottawa?
November can work for repointing in Ottawa, but the window is narrow and the weather has to cooperate. The Ontario Building Code (O. Reg. 163/24,...
For how long must new mortar stay above 5°C in Ontario?
The Ontario Building Code (9.20.14.1) requires that mortar and masonry be maintained at a temperature not below 5°C during installation and for not...
Signs that mortar froze after a late-fall Ottawa repair?
A National Research Council building digest (CBD-123) describes what to look for: "the familiar crows-foot pattern on the surface of a mortar joint...