Navigating the Ontario Building Code (OBC) can be confusing for homeowners. However, compliance is non-negotiable for safety and insurance purposes. Here is a simplified breakdown of the key rules for residential railings (guards).
When Do You Need a Railing?
In general, if a deck, porch, or balcony is more than 60cm (24 inches) above the adjacent ground, a guard is required by law.
Height Requirements
- Exterior (Decks/Porches): If the drop is less than 1.8m (5'11"), the minimum height is usually 900mm (36 inches).
- High Drops: If the drop is more than 1.8m, the minimum height increases to 1070mm (42 inches).
- Pool Enclosures: These have their own specific bylaws, often requiring a minimum height of 1.2m (48 inches) and non-climbable features. See our Pool Fences page for more info.
The "Climbability" Rule
For residential guards, the code prohibits horizontal elements that could facilitate climbing (like a ladder) between 140mm and 900mm off the floor. This is why horizontal cable railings are often restricted in Ontario unless they meet very specific testing standards. Vertical pickets or glass panels are the safest, most compliant options.
Glass Safety
Not all glass is equal. The code mandates the use of Tempered or Laminated Safety Glass. Standard float glass is dangerous and illegal for railings. At Aluminum Solutions, we use 10mm or 12mm tempered glass that exceeds minimum load requirements.
Disclaimer: This is a summary for informational purposes. Always consult with a professional or your local building department for the specific requirements of your project.
