Basement Waterproofing in North York

In homes of that era, the most common sources are foundation cracks (especially at cold joints), failed parging on block foundations, and window well drainage failure. We inspect before recommending an approach.

Yes. We work on parking-level waterproofing systems including traffic-bearing membranes, joint systems, and crack injection. We have experience with mid-rise and commercial parking structures throughout North York.

It depends on the failure mode and site conditions. Exterior waterproofing addresses the source but requires excavation. Interior systems manage water after it enters. We explain both options honestly and recommend what's appropriate for your situation.

Interior crack injection or drainage mat installation is typically 1-2 days. Exterior excavation and membrane application on a residential foundation is 3-5 days depending on scope.

Yes. Depending on the system installed, we provide transferable written warranties. We'll explain the terms clearly before work begins.

For active leaks at a cold joint or vertical crack in a 1950s-60s poured foundation, we typically use epoxy or polyurethane injection from the interior. Where the crack is wide, horizontal, or tied to exterior grading and downspout issues, exterior excavation and membrane repair is the more durable fix.

Hairline vertical cracks from concrete shrinkage are common in 60-70 year old foundations and are usually cosmetic. Homes on ravine-adjacent lots near Hoggs Hollow, where clay soils hold more water against the foundation, tend to see more hydrostatic pressure and wider cracking over time.

Interior injection for a single crack typically runs $500 to $1,500. Exterior excavation and membrane repair for a section of foundation wall is priced by linear footage and depth once we've assessed grading and soil conditions.

Usually not if the cause is gradual seepage or settling, that's treated as a maintenance issue. Sudden water entry tied to a specific storm or municipal sewer backup is more likely to be covered. We can document conditions to support a claim either way.

A sump pump collects groundwater in a basin below the slab and discharges it away from the foundation before it can seep in. Homes near Don Valley Village and other areas close to the Don River's tributary creeks often have a higher water table and benefit from one, especially where the home lacks modern weeping tile.

Most residential sump pumps last 7-10 years with normal use. Replacement, including the check valve and discharge line, typically runs $600-$1,500 installed. We recommend testing yours every spring before the snowmelt season.

For water-related foundation problems, yes, and that covers most of what North York homeowners mean by foundation repair: shrinkage cracks and cold joints injected from inside, failed parging on block walls rebuilt, window wells drained properly, and sections of wall dug out and membraned where the leak can only be stopped from outside. On the 60 to 70 year old foundations between Lawrence and Sheppard those are the usual repairs. Movement is a different matter. A poured wall with a horizontal crack and a lean, or a block wall bowing at mid-height, is a structural problem that needs an engineer's assessment before any waterproofing goes on it, and we say so at the first visit.

Finding the entry point comes first, because several different sources look alike from inside a finished basement: a crack in the wall, the cold joint where the wall meets the floor, a window well with no drain, a floor drain backing up, or summer condensation on a cold foundation wall. We check each one and repair only what is actually letting water in. A single leaking crack is usually an interior injection finished in a day or two. A leak along the floor joint, or one that moves somewhere new each time it is sealed, points to groundwater pressure and a drainage fix, which we see most often on the streets near the Don tributaries.