Can a walkway be poured in late fall in Manotick?

Pouring a concrete walkway in late fall in Manotick is possible, but the timing depends on air temperature. The 2024 Ontario Building Code sets the threshold at 5 °C: when the air temperature is below that, concrete must be kept at not less than 10 °C and not more than 25 °C while being mixed and placed, and maintained at not less than 10 °C for 72 hours after placing, with no frozen material or ice used.

If the air is below 5 °C at the pour or in the 72 hours after it, the contractor needs cold-weather protection in place. What those measures look like in practice is the contractor's call, and you should ask for a written description of what they plan to do before you agree to a fall pour date. The National Research Council's Canadian Building Digest 116 notes that freezing concrete in the plastic state usually results in permanent damage, even with a single cycle, so the protection window matters.

A few other things apply to this job regardless of season:

• Locates: whoever digs is an excavator under the Ontario Underground Infrastructure Notification System Act, 2012. A locate request must be submitted through Ontario Dig Authority at least 5 business days before any ground is broken, and it is free. Ask who will submit the request.
• Hardscaping licence: the City of Ottawa requires a hardscaping contractor licence for businesses installing walkways and pathways on private property. The licence has been required since March 1, 2026. Ask to see the contractor's licence and check the City's published list yourself. Ottawa Concrete Pros does not verify anyone's licence or insurance.
• Right of way: if the walkway crosses the City right of way to meet the sidewalk, the Access By-law 2026-139 applies. A residential pedestrian access not exceeding 1.8 metres in width, not within 0.6 metres of a fire hydrant or 1.8 metres of a vehicular access, and with no modification to the curb or sidewalk, does not require an access permit under section 20(3). If your frontage is 12 metres or less and there is an existing vehicular access, a pedestrian access in the right of way is not permitted unless the City approves it.
• Zoning: both Zoning By-law 2008-250 and Zoning By-law 2026-50 apply to applications deemed complete on or after March 11, 2026, with the most restrictive provisions from both applying. Under 2026-50, a walkway leading to a front or exterior side lot line is limited to 1.8 metres in width. Confirm the rules for your lot with the City.

Ask the contractor to put the cold-weather protection plan, the concrete strength (32 MPa is the Building Code standard for exterior flatwork), the base specification, and removal and disposal of any existing material in writing before you sign.

If you want to hear from local Ottawa concrete contractors about a fall pour in Manotick, the request form on this site sends your details to contractors listed in the Ottawa Construction Network directory.