Does my Ottawa renovation have to add wall blocking for grab bars?

The Ontario Building Code's grab-bar blocking rule applies to new houses, not automatically to every renovation. Here is what the Code actually says and what to ask before your project starts.

What the Code requires and when

Article 9.5.2.4 of the Ontario Building Code requires that where wood or steel studs enclose the main bathroom in a new house, the walls must be reinforced to allow grab bars to be installed later at the toilet, shower and tub. That rule is written for new construction.

Whether a renovation of an existing bathroom triggers the same requirement is a question we did not find a clear answer to in the Code text. The City of Ottawa's Building Code Services is the right place to ask whether your specific project, such as a bathroom gut-and-rebuild or a partial renovation, brings that article into play. Confirm it either way before the walls close.

Where grab bars are installed in a home, the Code does require that they resist a load of at least 1.3 kN applied vertically or horizontally (Article 9.31.2.3). That load requirement applies regardless of when the bars go in.

A few practical points worth asking about before work starts:

• If your renovation opens the bathroom walls for any reason, ask the contractor what it would take to add blocking while the wall is open, and whether that is included in the scope of work.
• Adding blocking where the wall is already closed costs extra.
• Ask the City whether your permit application needs to address the blocking rule given the scope of your renovation.

On the permit side, plumbing alterations and adding or moving walls are on the City of Ottawa's permit list. Replacing existing fixtures in place is not. Whether grab-bar blocking on its own requires a permit is not on either City list, so ask Building Code Services how they treat it for your project.

The grab-bar blocking rule is the building side of the question. The design of the bathroom itself, bar positions, heights and layout, is a bathroom renovation question that goes beyond what this site covers.

If you are looking for Ottawa contractors who do this kind of accessibility work, the request form on this page sends your project details to contractors listed in the Ottawa Construction Network directory.