Exterior Basement Waterproofing in Windsor, Ontario
The most complete fix for a foundation that's taking on water — excavation, a new waterproof membrane, and corrected drainage at the source.
- 15+ Yrs Local Experience
- Licensed & WSIB-Insured
- 100% Free Diagnostics
- Itemized Written Quotes
- Commercial-Grade Systems
What It Is
Exterior basement waterproofing addresses the problem from outside your home: excavating along the foundation wall down to the footing, applying a waterproof membrane directly to the foundation, installing or replacing exterior weeping tile, and re-grading so water drains away from the house instead of toward it. It's a bigger job than interior waterproofing — typically several days depending on scope — but it's the right call when water is actively pooling against the foundation, when an existing exterior membrane has failed, or when a structural issue needs to be addressed from outside at the same time.
Why This Fix (vs. interior)
Exterior waterproofing fixes the source — water never gets to the foundation wall in the first place. It's the right choice when there's visible pooling against the house, a failed old membrane, efflorescence combined with actual structural concerns, or when grading/downspout issues are part of the root cause. It costs more and takes longer than an interior system, which is why we only recommend it when the inspection actually points to it.
Signs You Need This
- Visible water pooling against the foundation after rain
- A basement wall that's damp or leaking even without an obvious crack
- An older home with a foundation membrane that's likely 20+ years old and never replaced
- Interior fixes attempted previously that didn't resolve the problem
Our Step-by-Step Installation Process
- 1
Free inspection & grading assessment
We check drainage patterns around your home, not just the basement itself — often the real cause is a downspout, grading slope, or window well that's directing water straight at the foundation.
- 2
Excavation
Careful excavation along the affected wall(s) down to the footing, with landscaping protected and restored as part of the job.
- 3
Membrane & drainage
A new waterproof membrane is applied to the foundation wall, and new or corrected exterior weeping tile is installed to redirect water away from the home.
- 4
Backfill & re-grading
Proper backfill and re-grading so surface water flows away from the foundation going forward, not just the subsurface fix.
- 5
Warranty & walkthrough
Written warranty documentation and a walkthrough of what was done and why.
Frequently Asked Questions: Exterior Basement Waterproofing
Stop Guessing — Get a Free Exterior Basement Waterproofing Inspection
Our certified technicians will assess your foundation, explain your options clearly, and provide a fixed itemized quote with zero sales pressure.
No high-pressure sales tactics. Transparent written itemized quote & licensed WSIB-insured craftsmanship.