Question 1

Is a crack that leaks only in spring still a waterproofing job in Ottawa?

Accepted Answer

A crack that leaks only in spring still needs attention, and whether the fix is classified as waterproofing under Ontario's Building Code depends on what is driving the water in, not on the season. The City of Ottawa names groundwater from snowmelt and heavy rain as one of the ways water enters a basement. Ontario's Building Code sets the dividing line at hydrostatic pressure. Where hydrostatic pressure occurs, waterproofing is required under clause 9.13.3.1.

Question 2

Who should look at a crack that leaks every spring in Stittsville?

Accepted Answer

A crack that lets water in every spring should be looked at by a waterproofing contractor, and depending on what they find, a licensed plumber may also be involved if the work touches the drainage or sump system. The City of Ottawa lists three ways water gets into a basement: sewer surcharging, groundwater coming through cracks or joints in walls or floors, and overland water entering through windows or cracks.

Question 3

Who decides if a foundation crack in Nepean is structural?

Accepted Answer

A structural engineer or a qualified contractor assesses whether a foundation crack is structural. On price, published Ontario contractor pricing puts crack injection at about $500 to $1,500 per crack; we found no published range for structural foundation repair. We found no Ontario or City of Ottawa rule that assigns the decision to a specific trade or profession for a repair on a private residence.

Question 4

Can a leaking foundation crack be injected from inside in Ottawa?

Accepted Answer

Yes, foundation cracks in Ottawa can be injected from inside the basement. Published 2025–26 Ontario contractor pricing puts crack injection at roughly $500 to $1,500 per crack, with one Ottawa source quoting from about $300 for epoxy work. The Ottawa-area price pages list two injection materials: epoxy and polyurethane.

Foundation Cracks

Is a crack that leaks only in spring still a waterproofing job in Ottawa?

Who should look at a crack that leaks every spring in Stittsville?

Who decides if a foundation crack in Nepean is structural?

Can a leaking foundation crack be injected from inside in Ottawa?