Basement Waterproofing in Etobicoke
From Humber-adjacent foundations with hydrostatic pressure to lakefront condo parking structures, we waterproof below-grade systems across Etobicoke.

Basement Waterproofing in Etobicoke, what we fix.
Basement leaks
Below-grade waterproofing
Sump pump installation
Balcony leaks
Terrace leaks
Underground parking waterproofing
Why our waterproofing actually holds.
Diagnose first
System-matched materials
Written warranties
Full documentation
Interior & exterior
Parking structure expertise
Diagnose first
We identify the actual entry point and failure mode before recommending a waterproofing system. The right system depends on the diagnosis.
System-matched materials
We specify and install waterproofing systems appropriate to the failure mode, not a one-size coating over everything.
Written warranties
Our waterproofing warranties are written, clearly explained before work begins, and transferable to future property owners.
Full documentation
Written inspection reports and completion documentation suitable for insurance, lenders, and reserve fund files.
Interior & exterior
We explain interior and exterior waterproofing options honestly, with the trade-offs, and recommend what's appropriate for your situation.
Parking structure expertise
Parking deck waterproofing, joint systems, and traffic membranes, commercial-grade capability applied to residential and commercial buildings.
“The right waterproofing system depends on what's actually failing. We find that out first.”
“The right waterproofing system depends on what's actually failing. We find that out first.”
Rated 5 out of 5Luciano did not try to sell me a new roof. Appreciated the honesty — he showed up when he said he would.
Rated 5 out of 5Blue Knight was, by far, the best. Responsive, ethical, totally professional — and their crew went above and beyond at no extra charge.
Rated 5 out of 5They installed a full new roof in one day. The crew worked around the house without us hardly knowing they were there.
Luciano did not try to sell me a new roof. Appreciated the honesty — he showed up when he said he would.
Blue Knight was, by far, the best. Responsive, ethical, totally professional — and their crew went above and beyond at no extra charge.
They installed a full new roof in one day. The crew worked around the house without us hardly knowing they were there.
I emailed at 4 a.m. and spoke with someone that same day. Estimate and completed work all within one day. Pricing was fair, work was excellent.
We had a leak diagnosed by two other contractors who could not find the source. Blue Knight found it on the first visit and fixed it the same week.
Flat roof replacement on a commercial unit. Clean, fast, no surprises on the invoice. The crew left the site cleaner than they found it.
Called after a storm damaged our roof. Someone was on site within hours, tarped everything, and had us fully repaired before the next rain.
Had a slow basement leak for years. Every other company just caulked it. Blue Knight found the actual source and did a proper waterproofing job. No issues since.
Our neighbours recommended them for a valley repair. Small job, but they treated it like it mattered — showed up on time, matched the shingles perfectly, and charged exactly what they quoted.
Featured Projects.
Rooftops across the GTA.
From downtown Toronto to the 905 and beyond, one crew, one warranty, twenty-five years of GTA rooflines.
Service availability may vary. Call (647) 383-8664 to confirm coverage for your area.
Rooftops across the GTA.
From downtown Toronto to the 905 and beyond, one crew, one warranty, twenty-five years of GTA rooflines.
Service availability may vary. Call (647) 383-8664 to confirm coverage for your area.
Basement Waterproofing questions for Etobicoke.
Yes. Near-river properties require careful assessment of water table, drainage, and foundation condition before selecting an approach. We start with a full investigation.
Yes. Traffic-bearing membranes, expansion joint systems, and crack injection across the lakefront and Queensway-corridor buildings, many of which are now at or past the service life of their original membrane. Reports come formatted for reserve fund studies, because on a condo the work has to be justified to a board before it can be approved.
Neither is better in general; they solve different problems. Exterior excavation and membrane stops water at the wall and relieves the pressure driving it, which is the more complete answer where groundwater is the cause, as it often is near the Humber. Interior systems manage water that has already entered, at lower cost and far less disruption. We tell you which failure mode you actually have and price both where both are genuinely viable.
Three to five days for a typical residential foundation section, covering excavation, wall preparation, membrane and drainage board, new weeping tile where needed, and backfill. Humber Valley properties sometimes run longer because access for equipment is tighter on those lots and because a high water table means managing the open trench while the work is underway.
Yes, specific to the system installed and handed to you before work begins rather than after. The terms differ between interior and exterior work, and between a crack injection and a full perimeter system, so we go through what is actually covered instead of leaving you to find out at the point you need it.
We first determine whether the crack is active or dormant and whether it's driven by hydrostatic pressure from the nearby river valley or ordinary settlement, then seal or inject it and address the drainage source, since patching the crack alone rarely holds on these properties.
Hairline vertical cracks are common in 1950s-60s poured foundations as concrete cures and settles. Horizontal cracks or ones actively leaking, especially in Humber Valley homes with high groundwater, need proper assessment.
A straightforward interior crack injection typically runs a few hundred dollars, while exterior excavation and membrane repair on a Humber-adjacent foundation costs considerably more. We scope it after seeing the crack and the surrounding grading.
A sump pump collects and discharges groundwater from beneath the basement slab before it can rise into the living space. Homes near the Humber River and in low-lying pockets of Etobicoke's plateau neighbourhoods are the properties where we most often install or replace one.
A standard pedestal or submersible pump usually lasts 7-10 years, but properties close to the Humber with frequent cycling during spring thaw tend to wear pumps faster, we check impeller condition and battery backup as part of our inspections.
Installing a new sump pit and pump in an existing basement typically costs more than a straight pump swap in an already-piped system, and Humber-adjacent homes sometimes need a battery backup added given the flood-plain proximity.
Etobicoke's geographic diversity creates distinct basement waterproofing scenarios. Properties in the Humber Valley deal with high water tables and seasonal flooding. Properties on the plateau deal with surface drainage and aging foundations. Lakefront buildings have aggressive moisture from below and above.
We assess each situation individually. The right system for a 1955 poured concrete foundation is different from what's needed in a 1990s condo parking structure.
Basement Waterproofing Near the Humber
Properties adjacent to the Humber River corridor in Etobicoke deal with groundwater conditions that demand proper assessment rather than generic solutions. We bring the diagnostic approach that these sites require.
Our waterproofing work in the Humber Valley area accounts for seasonal groundwater fluctuation and the specific foundation types used in these older neighbourhoods.
Parking Structure Waterproofing in Etobicoke
Etobicoke's lakefront and Queensway-corridor condos have underground parking structures approaching or past their membrane lifespan. We work with condo corporations and property managers on assessment and repair.
Documentation for reserve fund planning is a standard part of our scope on commercial and condo parking-level projects.
We also cover nearby cities.
Ready to schedule your estimate?
We come to you, assess the roof, and give you a written quote. You are not obliged to proceed. Most estimates completed same week.
