Professional Basement Waterproofing Solutions That Work
Protect your basement from water leaks, moisture, and flooding with professional interior waterproofing solutions designed for Toronto & GTA homes.
At Kome Waterproofing and Underpinning Inc, we specialize in interior basement waterproofing systems that control water intrusion, relieve hydrostatic pressure, and keep basements dry year-round.
Licensed & Insured
Ontario Building Code Compliant
Proven Interior Drainage Systems
Free On-Site Estimates
Serving Toronto & GTA
Get a Free Interior Waterproofing Estimate
What Is Interior Waterproofing?
Interior waterproofing is a basement water control system designed to manage and redirect water that enters through foundation walls or under the basement slab.
Instead of excavating outside, interior waterproofing works from inside the basement, using drainage systems, weeping tile, sump pumps, and vapor barriers to safely collect and discharge water away from your home.
It is one of the most effective and cost-efficient solutions for basements with recurring leaks or high groundwater levels.
Signs You Need Interior Basement Waterproofing
You may need interior waterproofing if you notice:
- Water leaks along basement walls
- Water coming up through the basement floor
- Damp or musty basement smells
- Mold or mildew growth
- Efflorescence (white powder) on walls
- Basement flooding after heavy rain
- High groundwater or poor exterior drainage
Ignoring these issues can lead to structural damage, mold problems, and reduced property value.
1. Basement Inspection & Diagnosis
We identify water entry points and evaluate foundation conditions.
2. Floor Trenching
A trench is cut along the interior perimeter of the basement floor.
3. Interior Weeping Tile Installation
We install a drainage system to collect water under the slab.
4. Sump Pump Installation
Collected water is redirected safely away from the foundation.
5. Vapor Barrier (When Required)
Prevents moisture and humidity from entering the living space.
6. Concrete Restoration
The floor is restored for a clean, finished look.
We follow a proven, code-compliant process to ensure long-lasting results:
Our Interior Waterproofing Process
Clean work Minimal disruption Reliable drainage system
Interior Waterproofing Systems We Use
We install only professional-grade interior waterproofing systems, including:
- Interior weeping tile drainage systems
- Sump pump systems with backup options
- Vapor barriers and wall membranes
- Floor-to-wall drainage channels
- Foundation crack integration (when needed)
Each system is customized based on foundation type, water source, and basement layout.
Interior Waterproofing Cost in Toronto & GTA
The cost of interior waterproofing in Toronto typically ranges from:
What affects the cost?
- Basement size
- Severity of water intrusion - Existing concrete condition
- Foundation type
- Sump pump requirements
- $70 – $120 per linear foot
- Small sections: $3,000 – $6,000
- Partial basement: $6,000 – $12,000
- Full basement system: $12,000 – $25,000+
Interior waterproofing is often more affordable than exterior systems while still providing excellent protection.
Interior vs Exterior Waterproofing – Which Is Better?
Interior Waterproofing
Exterior Waterproofing
- Lower cost
- Faster installation
- Ideal for high groundwater
- Minimal exterior disruption
- Stops water at the source
- Protects foundation walls
- Best for structural protection
Many Toronto homes benefit from interior waterproofing, especially when exterior excavation is limited or cost-prohibitive.
Why Choose Interior Waterproofing for Toronto Homes?
Toronto homes often face:
- Heavy clay soil
- High water tables
- Freeze-thaw cycles
- Aging foundations
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