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Foundation Waterproofing in Montreal
Your home’s foundation is the most important structural element — and when water reaches it, the entire property is at risk. Montreal’s climate, with heavy rainfall, melting snow, and freeze–thaw cycles, can cause serious water pressure against foundations, leading to cracks, leaks, mold, and long-term structural damage.
At Tross Construction, we provide professional foundation waterproofing services designed to protect your home from moisture, extend its lifespan, and ensure long-term stability. Whether you have an older home or new construction, our waterproofing solutions deliver maximum protection and peace of mind.
Seal & Protect Your Home with Professional Foundation Waterproofing
Foundation waterproofing prevents water from entering through walls, floors, and cracks. We use advanced materials and proven installation techniques to ensure your foundation stays dry and secure.
Exterior Foundation Waterproofing
This method stops water before it touches your foundation. It includes:
Excavation around the home
Cleaning the foundation wall
Installing waterproof membranes
Applying protective coatings
Adding drainage boards
Installing new French drains (weeping tiles)
Exterior waterproofing provides the strongest, longest-lasting protection.
Interior Foundation Waterproofing
An effective alternative when exterior digging isn’t possible. This includes:
Interior drain systems
Vapor barrier wall systems
Crack injections
Interior sealing
Interior waterproofing controls water after it enters but before it damages your basement.
Foundation Crack Waterproofing
We repair cracks using:
Polyurethane injections (for flexible sealing)
Epoxy injections (for structural repair)
Exterior crack excavation & sealing
Each method ensures the crack is sealed permanently and water-tight.
Why Foundation Waterproofing Is Essential in Montreal
Montreal’s soil expands when frozen and contracts when thawing. This repeated movement creates pressure against foundation walls, leading to damage over time.
Benefits of Proper Foundation Waterproofing
Prevents water infiltration
Protects structural integrity
Stops mold and mildew
Reduces humidity in the basement
Prevents foundation cracks
Extends home lifespan
Reduces long-term repair costs
Improves property value
Foundation waterproofing is not optional — it’s a necessary investment in home safety.
Signs Your Foundation Needs Waterproofing
If you notice any of the following, foundation waterproofing should be performed immediately:
Water-Related Signs
Wet basement walls
Water pooling near the foundation
Damp spots on walls or floors
Water entering during heavy rain
Structural Warning Signs
Horizontal or vertical foundation cracks
Crumbling concrete
Bowing walls
Uneven basement floors
Moisture & Air Quality Issues
Musty smell
Mold or mildew
High humidity
Efflorescence (white powder)
Condensation on windows
These problems worsen over time and can become much more expensive to fix if ignored.
Our Foundation Waterproofing Process
We follow a detailed, step-by-step procedure to ensure long-lasting results.
1. Foundation Inspection & Assessment
We analyze:
Water entry points
Soil conditions
Interior moisture levels
Crack patterns
Drainage problems
Exterior grading
This allows us to create a tailored waterproofing plan.
2. Excavation (for Exterior Waterproofing)
We excavate down to the footing level around the affected walls, exposing the entire foundation for treatment.
3. Cleaning & Crack Repair
We clean the wall for membrane adhesion and repair any cracks using epoxy or polyurethane.
4. Waterproof Membrane Application
We apply a thick, professional-grade waterproofing membrane designed to withstand Montreal’s climate.
Common membrane types include:
Rubberized asphalt
Elastomeric membranes
Bituminous coatings
5. Installation of Drainage Boards
Drainage boards protect the membrane and channel water downward efficiently.
6. Weeping Tile (French Drain) Installation
A perforated drain pipe is installed at the base of the foundation to direct water away from the home.
7. Gravel Backfill & Soil Replacement
We backfill with clean gravel to improve drainage and top up with high-quality soil.
8. Final Inspection
We test the entire system to ensure your foundation is protected.
Why Choose Tross Construction for Foundation Waterproofing?
Waterproofing Specialists
We specialise in Montreal foundations and understand local soil and weather conditions.
Long-Term Solutions
Our waterproofing systems are designed to last decades with minimal maintenance.
High-Quality Membranes & Materials
We use only industry-approved products that provide superior protection.
Comprehensive Services
We offer both interior and exterior waterproofing, ensuring the right solution for your home.
Skilled Excavation & Foundation Team
Our crews complete excavation and foundation work safely and efficiently.
Transparent Estimates
You get a clear breakdown of the work and pricing before we begin.
Clean Job Sites
We respect your property and clean up thoroughly after completion.
Additional Foundation Services We Offer
Foundation Crack Injections
Permanent sealing using epoxy or polyurethane.
Weeping Tile Replacement
Old clay drains are replaced with modern perforated systems.
Exterior Grading Correction
Improves drainage away from the foundation.
Basement Moisture Control
Dehumidifiers, vapor barriers, and air-sealing.
Exterior Insulation Panels
Improves both energy efficiency and waterproofing performance.
Frequently Asked Questions
Exterior waterproofing typically lasts 20–30 years or more with proper installation.
Costs vary depending on foundation condition, excavation needs, and drainage system requirements. We provide detailed quotes.
Interior waterproofing can be done year-round. Exterior waterproofing depends on ground and weather conditions.
Yes — we offer warranty options depending on the waterproofing system installed.
We perform crack injections or exterior sealing before applying waterproofing materials.
Protect Your Home with Professional Foundation Waterproofing
Your foundation supports your entire home — keeping it waterproof is essential for safety and long-term value. With Tross Construction, you get expert waterproofing solutions designed for Montreal’s climate and soil conditions.
Contact us for a free foundation waterproofing estimate
Serving Montreal and surrounding regions
Strength you can see. Quality you can trust.
Licence RBQ #5841923501
Tross Construction Inc. is a company specializing in interior and exterior renovation projects, masonry, concrete and everything related to finishing work.
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