MarkhamBuilding InspectionsInspections

Flashing at Cold Room Concrete Porch Slab

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
Instruments: CSA A82.1 M87 · ASTM C216-91

Overview

Builder Tip Issue No. 13 from the City of Markham Building Standards Department, dated January 1, 2025 and updated to the 2024 Ontario Building Code, on the brick veneer flashing where a cold room's concrete porch slab meets the wall; listed among the City's housing tips. It quotes Articles 9.20.13.1., 9.20.13.3., 9.20.13.6. and 9.20.13.7. on flashing material, through-wall location, weep holes and joints. The Objective covers 152 mm sealed laps, end dams and choosing low-absorption brick, citing CSA A82.1 M87 and ASTM C216-91.

What it covers

9.20.13.1. Material for Flashing
9.20.13.3. Location of Flashing
9.20.13.6. Flashing for Weep Holes in Masonry Veneer
9.20.13.7. Flashing Joints
Objective

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