How low does a door threshold need to be for wheelchair access?

Door thresholds for wheelchair accessibility must be no higher than 13mm (1/2 inch) under the Ontario Building Code, with beveled edges when the threshold exceeds 6mm (1/4 inch).

The Accessibility for Ontarians with Disabilities Act (AODA) and Ontario Building Code set specific requirements for barrier-free design. For residential applications, thresholds should ideally be as low as possible - preferably flush or no more than 6mm high. When thresholds must be higher due to weather sealing requirements, they need beveled edges at a maximum slope of 1:2 (50% grade) and cannot exceed the 13mm maximum height.

In Ottawa's climate, achieving low thresholds requires careful planning because we need effective weather sealing against snow, ice, and heavy rain. Modern accessible door systems use advanced weatherstripping and drainage systems to maintain weather protection while keeping thresholds minimal. Entry doors often incorporate adjustable threshold systems that can be set to the lowest practical height while maintaining proper drainage away from the home.

Professional installation is crucial for accessible thresholds because improper installation can create water infiltration issues or actually increase the effective threshold height. The door frame must be perfectly level, and the threshold must integrate properly with your home's drainage system. Many accessible door systems also include features like wider door openings (minimum 32 inches clear width) and lever-style handles.

City of Ottawa requirements may vary for specific accessibility modifications - confirm with your licensed installer. For accessible door installation that meets all code requirements while maintaining weather protection, request a consultation with experienced door installers who understand barrier-free design principles.