Redirect Eavestrough Downspouts Away from Ottawa Walkways

A downspout emptying onto or near a walkway is more than just an annoyance — in Ottawa's winter climate, it is a serious slip-and-fall hazard that creates black ice on your walkway every time temperatures hover around freezing, which happens dozens of times each winter during our 50-plus freeze-thaw cycles. It can also damage the walkway surface itself, as repeated water saturation followed by freezing causes concrete to spall, interlock pavers to heave, and asphalt to crack.

Redirecting Downspout Water Away from Walkways

The simplest and most common solution is a downspout extension that carries water past the walkway to discharge on a permeable surface like lawn or garden bed. Rigid aluminum extensions cost $15 to $40 at Ottawa building supply stores and are available in colours that match standard eavestrough finishes. Rigid extensions are better than flexible corrugated extensions because they maintain consistent slope, do not sag or kink, and handle Ottawa's freeze-thaw cycling without cracking. For walkways that are close to the house, you may need a 90-degree elbow at the bottom of the downspout to redirect flow parallel to the foundation before the extension carries it past the walkway.

For a cleaner look, consider a flip-up or hinged downspout extension that sits flat against the ground when not needed and flips down during rain. These cost $25 to $50 and are particularly useful when the downspout is next to a walkway that gets regular foot traffic or snow clearing — you can flip the extension up before shovelling and flip it down when precipitation is expected.

The most permanent solution is an underground downspout drain that connects the bottom of the downspout to a buried pipe running under the walkway to discharge on the far side. A professional underground drainage installation in Ottawa costs $500 to $1,500 per downspout depending on the distance and whether you need to cut through concrete or interlock. The buried pipe should be 4-inch diameter rigid PVC, sloped at a minimum of one-quarter inch per foot, and terminate at either a pop-up emitter or a splash pad on the far side of the walkway. In Ottawa, the pipe should ideally be buried below the 1.2 to 1.5-metre frost line to prevent freezing, though shallower installation works if the pipe drains freely and does not hold standing water.

A rain barrel positioned between the downspout and the walkway is another option that captures the first flush of water and releases it slowly through a spigot directed away from the walkway. Rain barrels cost $50 to $150 and are available through the City of Ottawa's occasional rain barrel sales. However, rain barrels fill quickly during Ottawa's heavy summer thunderstorms and still require an overflow outlet directed away from the walkway.

Whichever solution you choose, ensure the final discharge point is at least 1.8 metres from the foundation as required by the Ontario Building Code and directed toward a permeable surface that drains away from both the house and the walkway. For professional help with downspout rerouting or underground drainage installation, browse contractors through the Ottawa Construction Network directory at justynrookcontracting.com.