Ontario SB-12 quick guide
Not sure what R-value you need?
Pick the part of the building you are working on. We will show you a practical planning target for Eastern Ontario and explain what the code number actually means.
Built around the 2024 Ontario Building Code SB-12 tables for Zone 1, including Ottawa, Winchester, Kingston, Cornwall and Smiths Falls.
R-value recommendation
What are you insulating?
Choose the project scope and assembly. Your result updates instantly.
This is a full-system requirement.
Insulation is only one part of the result. Framing, continuous insulation, sheathing, finishes, air films, thermal bridges and other layers affect the effective R-value of the complete assembly.
- Insulation portion
- Important