MarkhamBuilding InspectionsInspections
Protection From Precipitation – Residential Occupancy (Second Plane Of Protection)
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
- Also called
- Protection from Precipitation – Residential Occupancy (Second Plane of Protection)
- For
- builder
- Building types
- All building types
- Pages
- 4
- Instruments
- CAN/CGSB-51.32-M, Sheathing, Membrane, Breather Type
Overview
The City of Markham's four-page Builder Tip No. 46, dated January 1, 2025 and updated to the 2024 OBC, listed with the City's non-housing tips under the 2024 Ontario Building Code and following on from housing Tip #61 on both planes. It quotes Subsection 9.27.3. on the second plane of protection: sheathing membranes to CAN/CGSB-51.32-M, lapping 100 mm, insulating sheathing in lieu of membrane, two layers where no sheathing is used, and face sealed cladding. Its commentary covers the 10 mm rainscreen drainage space and locked-seam metal siding.
What it covers
- 9.27.3. Second Plane of Protection
- 9.27.3.2. Sheathing Membrane Material Standard
- 9.27.3.3. Required Sheathing Membrane and Installation
- 9.27.3.4. Insulating Sheathing in Lieu of Sheathing Membrane
- 9.27.3.5. Sheathing Membrane in Lieu of Sheathing
- 9.27.3.6. Face Sealed Cladding
- Commentary
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.