MarkhamBuilding InspectionsInspections
Masonry Construction in Cold Weather
Published by City of Markham
This is the City of Markham’s document, as published on its website on 18 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice
- Type
- Guide
- Published by
- City of Markham
- Date
- January 1, 2025
- For
- builder
- Building types
- All building types
- Pages
- 2
Overview
Markham's Builder Tip Issue No. 10, dated January 1, 2025 and updated to the 2024 Ontario Building Code, on concrete and masonry work below 5 °C, filed with the City's housing tips. It quotes Article 9.3.1.9. on concrete temperatures for 72 hours after placing, and Articles 9.20.14.1. and 9.20.14.2. on mortar and masonry temperatures and covering unfinished work. The Objective notes early freezing can cut concrete strength by 30%, and the second page gives practices for concrete work, mortar mixing and masonry laying, including heater ventilation.
What it covers
- 9.3.1.9. Cold Weather Requirements
- 9.20.14.1. Laying Temperature of Mortar and Masonry
- 9.20.14.2. Protection from Weather
- Objective
- Concrete Work
- Mortar Mixing
- Masonry Laying
DocHub collects what a municipality published; it cannot tell you what is in force today. A newer version may exist, may be titled differently, or may not be posted publicly at all.
Pick a document. It opens here as the real file — you can select its text, search inside it, follow its own links, and every page is present.