Water Along the Wall-Floor Joint
Dampness or visible seepage where the foundation wall meets the basement floor.
Interior Waterproofing
Interior Basement Waterproofing in London, Ontario
Complete interior waterproofing systems designed to capture and control groundwater before it enters the living space. We diagnose the source first, then design a system matched to your foundation.
Free Estimates
Weekly Availability
Transferable Warranty
Signs Your Basement May Need Interior Waterproofing
Water problems often start with subtle warning signs. If you notice any of the following in your basement, an interior waterproofing system may help protect your home.
White Deposits on Walls
Efflorescence or chalky mineral deposits can indicate moisture moving through concrete.
Musty Odours & Humidity
Persistent damp smells or elevated humidity can signal excess basement moisture.
Mold or Wall Staining
Dark staining or localized mold near the bottom of basement walls can indicate ongoing moisture.
Seepage After Heavy Rain
Water appearing during heavy rainfall or spring snowmelt often points to groundwater pressure.
Floor & Perimeter Cracks
Cracks in the basement floor or perimeter can become entry points for groundwater.
Inside an Interior Waterproofing System
Hover over each component to see how the pieces of an interior waterproofing system work together to capture and control groundwater.
System Component
Perimeter Drainage Channel
A perforated drainage channel is installed along the footing inside the basement perimeter to collect groundwater before it reaches the floor.
Perimeter Drainage Channel
A perforated drainage channel is installed along the footing inside the basement perimeter to collect groundwater before it reaches the floor.
- Captures water at the wall-floor joint where it enters
- Gravel bedded channel connects to the sump pit
- Designed for high groundwater pressure and spring snowmelt
Wall Drainage Membrane
A dimpled drainage membrane is applied to the foundation wall to direct any moisture straight down into the perimeter drainage system.
- Creates an air gap between wall and finished space
- Channels seepage down to the perimeter drain
- Protects finished walls from hidden moisture
Sump Pit & Pump
Collected groundwater is routed to a sump pit where a pump discharges it safely away from the foundation, keeping the basement dry.
- Sealed sump basin with airtight lid
- Pump sized to your home's drainage load
- Optional battery backup for storm outages
Floor Restoration
Once the drainage system is in place, the perimeter trench is filled and new concrete restores a clean, finished floor surface.
- New concrete matched to existing floor level
- Clean, broomed finish ready for flooring
- Minimal visible evidence of the system below
Installation Process
Interior waterproofing captures and controls groundwater before it enters the living space. A professional system is installed in a carefully planned process designed to channel perimeter water directly to a sump pit for safe discharge - while minimizing disruption to your home.
Engineered Installation Protocol
5-Step Precision Process
Executed with clinical precision by certified technicians to ensure long-term water management and zero hassle.
01
Prepare & Protect
We protect the work area and carefully remove flooring along the basement perimeter where required.
02
Excavate & Install Drainage
A narrow section of floor is opened along the footing and a perimeter drainage channel to collect groundwater.
03
Install the Wall Membrane
A waterproof drainage membrane is applied to the foundation wall to direct moisture into the drainage system.
04
Connect Sump & Restore Floor
The drainage system is connected to the sump pit, the trench is filled, and new concrete restores a clean, finished floor surface.
05
Test & Clean
We inspect the completed system, test drainage, and leave the work area clean.
System CutawayEngineered perimeter drainage & wall membrane groundwater control system
✓
Schedule A Free EstimateLifetime System
Fully Tested & Certified
Benefits of an Interior System
A properly engineered interior waterproofing system protects your home, your finishes, and your indoor air quality - while adding long-term value and peace of mind.
Protects Finished Basements
Captures perimeter groundwater before it reaches drywall, flooring, and finished living areas.
Improves Indoor Air Quality
Reduces humidity and dampness that fuel mold growth and musty odours throughout your home.
Increases Usable Living Space
Turns a damp, unusable basement into clean, dry square footage you can actually finish and enjoy.
Adds Property Value
A documented waterproofing system is a strong selling point and reassures future buyers.
Works with Existing Landscaping
Interior installation avoids excavating exterior walls, preserving decks, patios, and gardens.
Reliable Year-Round Protection
Engineered to handle groundwater pressure through every season, including spring snowmelt.
Frequently Asked Questions
Frequently Asked Questions
London & Southwestern Ontario
Stop Water Before It Causes More Damage
Whether you're dealing with a foundation crack, recurring basement seepage, drainage issue or failed sump pump, our London team will inspect the site and deliver a guaranteed solution.