Ontario Building Code
Ontario's provincial building code (O. Reg. 332/12) that governs construction standards including window, door, and glazing requirements for all buildings in Ontario.
The OBC references NAFS for window and door performance and SB-12 (Supplementary Standard) for energy efficiency in houses. Recent amendments have increased minimum ER (Energy Rating) requirements for windows, pushing the industry toward higher-performing products.
Key glazing requirements include: safety glass in hazardous locations, egress window sizes for bedrooms, fire-rated glazing near property lines, and guard/railing specifications for glass railings and balconies.