Professional Service
Exterior Waterproofing Toronto
Complete foundation protection from the outside. Excavation to footing, membrane installation, drainage systems. Government rebates up to $3,700 available.
Problems We Solve
Toronto's Unique Foundation Challenges
Professional solutions for the GTA's specific climate and soil conditions
Clay Soil Expansion
Toronto's clay-rich soil expands up to 40% when wet, putting tremendous pressure on structural walls. This hydrostatic pressure can reach 60 PSF, causing cracks, bowing walls, and water infiltration. Our exterior protective system addresses this by creating a moisture shield between the soil and your building structure.
Freeze-Thaw Cycles
Toronto experiences 40-50 freeze-thaw cycles annually, causing structural damage as water expands 9% when freezing. This creates progressive deterioration of concrete and mortar joints. Exterior protective barriers prevent water from entering these vulnerable areas.
High Water Table
Many Toronto neighborhoods, especially near Lake Ontario and the Don River, have water tables within 6-8 feet of the surface. This constant moisture pressure requires professional exterior drainage solutions to protect your structure year-round.
Aging Infrastructure
Over 60% of Toronto homes were built before 1980 with outdated moisture control methods. Original tar-based coatings have deteriorated, weeping tiles are clogged with sediment, and structural walls have developed cracks. Modern exterior protective systems restore security.
The Solution
What Is Exterior Waterproofing?
The gold standard for permanent foundation protection
Exterior moisture protection is the gold standard for protecting your home's structural base from water damage. This comprehensive solution involves excavating around your building structure to the footing level (typically 6-8 feet deep), repairing any existing damage, and installing a multi-layer protective barrier system that stops moisture before it can reach your structural walls.
Unlike interior water management which handles moisture after it enters, exterior protective barriers prevent infiltration entirely. This method addresses the root cause of lower level water problems by creating an impermeable barrier on the positive side (exterior) of your structural walls, where hydrostatic pressure is applied.
The process includes structural repairs, membrane application, drainage board installation, new weeping tile system, proper grading, and complete restoration of your property. With our 25-year transferable warranty, this investment not only protects your home but also increases its value by up to 30%.
How It Works
Our 6-Step Protection Process
Excavation & Site Preparation
Protect your property with plywood pathways. Carefully excavate to footing (6-8 feet) with mini-excavators. Maintain 3-foot working space with safety slope. Hand-dig around utilities, protect landscaping.
Foundation Inspection & Repair
Power-wash exposed walls. Inspect for cracks and deterioration. Route cracks to V-groove, fill with hydraulic cement. Repoint mortar joints, repair spalling concrete, seal tie rod holes.
Protective Barrier Application
Apply liquid rubber primer. Install rubberized asphalt membrane (60-mil) or spray-applied rubber coating (80-mil minimum). Create seamless, fully-adhered barrier. Reinforce footing-wall joint.
Drainage Protection Board
Install dimpled drainage board (Delta-MS) over membrane. Protect membrane during backfill, create air gap, channel water to weeping tile. Mechanically fasten at top, extend from grade to footing.
Weeping Tile & Drainage System
Install new 4-inch perforated PVC weeping tile at footing. Surround with 3/4-inch clear gravel. Slope 1/8 inch per foot toward sump or storm connection. Add filter fabric, install cleanout ports every 25 feet.
Backfilling & Restoration
Backfill in 12-inch lifts with proper compaction. Use free-draining material for first 2 feet. Grade slopes away at 5% for 6 feet. Restore landscaping, seed/sod grass, replace concrete/asphalt, clean site.
Premium Materials
Professional-Grade Membranes & Systems
Industry-leading materials for maximum protection
Liquid Rubber Membrane
- 50+ year lifespan
- Seamless application
- Self-healing properties
- Best for severe water issues
$250-$400
per linear foot
Rubberized Asphalt Sheet
- 30-40 year lifespan
- Consistent thickness
- Proven reliability
- Standard residential choice
$200-$275
per linear foot
NBC 9.13.3 Moisture Control Requirements
When Moisture Protection Required
- • Hydrostatic pressure present
- • Water table above floor level
- • Poor drainage conditions
- • Underground structure roofs
System Requirements
- • Two-membrane system minimum
- • Continuous wall-floor connection
- • Floor membrane between slabs
- • 75mm min concrete layers
Critical: If water table rises >200mm above floor, buoyant pressure exceeds slab weight. Walls subject to hydrostatic pressure must be designed per NBC Part 4 and protected from moisture.
Protective Membranes
- ■ Blueskin WP200 self-adhering membrane
- ■ Aqua-Bloc 720-38 elastomeric coating
- ■ Tremco TREMproof 250GC spray-applied
- ■ W.R. Meadows Mel-Rol moisture barrier
Drainage Components
- ■ Delta-MS dimpled drainage membrane
- ■ 4" Schedule 40 PVC weeping tile
- ■ 3/4" clear drainage stone
- ■ Non-woven geotextile filter fabric
Pricing
Investment & Pricing
All prices include materials, labour, and our 25-year transferable warranty.
Basic Protection
$13,000 - $19,000
Essential exterior waterproofing for smaller projects
- Partial wall excavation
- Standard membrane application
- Basic drainage system
- Landscape restoration
- 10-year warranty
Complete System
$19,000 - $30,000
Full perimeter protection with premium materials
- Full excavation to footing
- Premium rubberized membrane
- New weeping tile system
- Drainage board installation
- Foundation crack repairs
- 25-year transferable warranty
Premium Package
$30,000 - $43,000
Complete protection plus structural upgrades
- Everything in Complete System
- Major foundation repairs
- Window well installations
- Sump pump system upgrade
- Concrete parging
- Annual inspections (5 years)
- 25-year warranty + service plan
Your Investment
Return On Investment
Protect your home, increase your property value
Immediate Savings
Prevent water damage repairs averaging $22,000-$54,000. Eliminate mold remediation costs of $5,400-$16,000.
Stop structural deterioration requiring $32,000+ in repairs.
Long-Term Value
Increase home value by 5-10% immediately. Transferable warranty adds $11,000+ to selling price.
Lower insurance premiums save $550-$1,600 annually.
Government Rebate Program
Save up to $3,700 on your project
The City of Toronto offers up to $3,700 in rebates for qualifying projects through the Basement Flooding Protection Subsidy Program.
- We handle all paperwork and applications
- Instant qualification check during inspection
- Rebate applied directly to your final invoice
Service Areas
Expert Protection Across the GTA
Local expertise for Toronto's unique foundation challenges
Downtown Toronto & Old Toronto
Century homes with rubble foundations require specialized techniques. High water table near Lake Ontario demands robust drainage systems. Limited access in dense neighborhoods requires compact equipment.
Average: $19,000-$30,000
North York & Scarborough
1960s-1980s homes with poured concrete foundations. Clay soil prevalent throughout area. Larger lots allow full perimeter access.
Average: $16,000-$24,000
Mississauga & Brampton
Newer subdivisions with varying soil conditions. Some areas built on former farmland with poor drainage. Modern building codes but aging waterproofing.
Average: $15,000-$22,000
Vaughan & Richmond Hill
Mix of new construction and established neighborhoods. Variable soil conditions from sand to heavy clay. Larger properties often require extensive drainage.
Average: $17,000-$26,000
24/7 Emergency Service Available
Same-day response for urgent moisture control needs
Call: 437-545-0067Our Guarantee
25-Year Transferable Warranty
The most comprehensive warranty in the industry
Warranty Coverage
- ✓ Water barrier integrity for 25 years
- ✓ Drainage system functionality for 25 years
- ✓ Foundation crack repairs for 25 years
- ✓ Workmanship guarantee for 25 years
- ✓ Material defects for 25 years
Warranty Benefits
- ✓ Fully transferable to new owners (once)
- ✓ No deductibles or service charges
- ✓ Annual inspections included (first 5 years)
- ✓ 24/7 emergency response
- ✓ Adds $11,000+ to home value
Questions?
Frequently Asked Questions
Everything you need to know about exterior waterproofing
Still have questions?
Our experts are available 24/7 to answer your waterproofing questions. Call 437-545-0067 or book a free inspection.
Complete Solutions
Related Waterproofing Services
Additional protection options for your home
Interior Waterproofing
Affordable alternative with interior water management systems and sump pumps. Ideal for finished basements.
FROM $3,800
Learn MoreFoundation Repair
Crack injection, wall reinforcement, and structural repairs. Stop water at the source.
FROM $550
Learn MoreSump Pump Systems
Primary and backup pumps with battery systems. Qualify for $1,850 city rebate.
FROM $1,300
Learn MoreReady to Protect Your Foundation?
Get a free inspection and detailed quote for your exterior waterproofing project