Superior Waterproofing Ottawa
#1 Rated Expert foundation waterproofing services built for Ottawa’s freeze-thaw climate—stop leaks, protect your property, and keep your basement dry year-round.
Basement Waterproofing Ottawa, ON
We’re your local experts, connecting you with the best waterproofing contractors and service specialists across the Greater Ottawa area.
Living and building in Ottawa comes with its own set of environmental challenges. Every construction project must account for our four-season climate—heavy snowfall, spring thaws, freeze–thaw cycles, rainfall, and high humidity. Without proper protection, these conditions will eventually compromise any structure. Waterproofing is a critical component for wood, concrete, steel, and masonry, helping defend them from moisture, ice, and long-term weather damage.
We are leaders in providing superior basement waterproofing and building-protection solutions for Ottawa’s unique climate. From heavy winter snow to sudden summer storms, we offer systems designed for strength, longevity, and year-round performance. Our services are available for residential, commercial, and industrial projects.
We are committed to meeting the needs of every customer. Our dedication to quality materials, professional service, and long-term results has made us one of Ottawa’s most trusted sources for waterproofing and building protection.
There’s no room for error when it comes to waterproofing. To prevent moisture penetration, structural damage, and costly repairs, materials must be dependable, durable, and properly installed. We provide a full range of waterproofing products from leading manufacturers.
Our Services
Applications of Building Waterproofing
Waterproofing is essential for protecting residential, commercial, and industrial buildings in Ottawa’s variable climate. Common applications include wet-wall protection, basement waterproofing, rain-barrier repairs, and foundation repair. Basement waterproofing remains one of our key specialty services.
Foundation Repair
Rainwater Management
Basement Waterproofing
Exterior Waterproofing
We offer a full range of services including home repair, renovation, new construction, and more. Whatever your vision, we have the experience and skill to bring it to life. We understand that many homeowners worry about unexpected costs—so we combine industry-leading service with fair, transparent pricing.
Types of Waterproofing Materials
Choosing the right waterproofing material is essential for protecting any structure—residential, commercial, or industrial. Each material performs differently, and selecting the wrong type can lead to failures, costly repairs, and long-term structural issues. Below is a guide to the most commonly used waterproofing materials and their features.
Waterproofing Materials Guide Ottawa, ON
Polyurethane Waterproofing
Polyurethane liquid membrane is one of the most popular and versatile waterproofing materials. It is widely used on pedestrian decks, water tanks, ponds, balconies, roofs, bridges, parking structures, and many other surfaces. Its flexibility and durability make it suitable for a broad range of applications.
Features & Benefits:
- Ideal for decks, water tanks, ponds, balconies, roofs, bridges, and parking decks
- Seamless coating for both small areas and large surfaces
- Easily applied to most substrates
- Deep surface penetration
- Excellent elasticity
- Requires only ~2 mm of application thickness
- Quick service readiness after installation
- Lightweight once cured, suitable for light structures
- High UV resistance
- Can be self-applied
- Long service life (25–50 years)
Cementitious Coating Waterproofing
Cementitious coatings are made from a blend of cement, silica-based compounds, and chemical additives. When mixed with water or lime, they create a hardened, waterproof seal. This method is highly popular due to its simplicity and effectiveness—especially in moisture-prone indoor areas.
Features & Benefits:
- Used for water-retaining structures, concrete tunnels, tanks, and treatment facilities
- Excellent for foundations, walls, walkways, and sidewalks
- Silica-based for strong bonding
- Extremely easy to apply
- Suitable for industrial and residential use
- Ideal for underground structures, roofs, and decks
- Great for bathrooms, showers, and moisture-heavy areas
- Available in spray and liquid forms
EPDM Rubber Waterproofing
EPDM is a durable synthetic rubber made from ethylene and propylene. It is widely used for roofing and weather-sealing applications. EPDM is resistant to extreme temperatures, UV exposure, and weathering, making it a dependable waterproofing solution.
Features & Benefits:
- Commonly used for industrial flat roofs and new roof construction
- Used in door, trunk, and window seals
- Excellent for outdoor applications
- Suitable for lighting and HVAC applications
- Low electrical conductivity
- Resistant to steam and water
- Withstands UV, ozone, chemicals, and aging
- Highly durable in outdoor environments
Rubberized Asphalt Waterproofing
Rubberized asphalt membranes are fluid-applied systems made from asphalt blended with rubber polymers and mineral stabilizers. They are heated and applied at controlled temperatures (typically 350–400°F) to create a seamless, durable waterproofing layer.
Features & Benefits:
- Ideal for bridges, plazas, parking areas, and commercial roofs
- Provides seamless, monolithic waterproofing
- Bridges cracks up to 1/16″
- Adheres tightly to surfaces, preventing lateral water movement
- 100% solids with fast cooling
- Highly flexible and low-permeability
- Frequently used for podium decks, parking decks, balconies, foundations, roofs, and green roof systems
Bituminous Membrane Waterproofing
Bituminous membranes are popular in roofing and structural waterproofing. Made from sticky, viscous bitumen (asphalt), these membranes offer excellent durability and weather resistance. They are commonly installed as roll sheets or roofing felt.
Features & Benefits:
- Used for balconies, terraces (under tile), flat roofs, basements, parking decks, and retaining walls
- Suitable for below-grade structures, bridge decks, and tank linings
- Widely used in road construction
- Fully bonded installation system
- Highly weather-resistant
- Simple maintenance
- Excellent mechanical strength and puncture resistance
Thermoplastic Waterproofing
Thermoplastic materials soften when heated and solidify when cooled, allowing installers to weld sheets together for a highly durable, continuous waterproofing barrier. Though not the cheapest option, thermoplastics offer unmatched longevity and strength.
Features & Benefits:
- Used for foundation walls, tunnels, slabs, plaza decks, green roofs, and zero-lot-line construction
- Also used in pharmaceutical and apparel manufacturing
- Suitable for elevator pits, tanks, fountains, decks, and split slabs
- Life expectancy of over 75 years
- Available in liquid-applied formats
- Flexible, durable, and airtight
- Excellent protection against water and air penetration
Bituminous Coating Waterproofing
Also known as asphalt coating, this method is ideal for concrete foundations. Bituminous coatings offer strong waterproofing performance but should not be exposed to direct sunlight unless modified with flexible polymers.
Features & Benefits:
- Used for roofs, basements, concrete decks, and terraces
- Non-toxic and safe for residential use
- Works with polyester, fiberglass, and similar reinforcements
- Easy to apply with no heating required
- Suitable for irregular surfaces
- Can be applied independently
- Typical coating thickness ~2 mm
PVC Waterproofing Membrane
PVC roofing membranes are single-ply systems used on flat and low-slope roofs for more than 50 years. Reinforced with polyester, they provide long-lasting waterproofing and are suitable for both commercial and residential use.
Features & Benefits:
- Excellent for walkable surfaces: sundecks, patios, balconies, pool surrounds, stairs, roof decks
- Designed for heavy foot traffic and Canada’s harsh weather
- Suitable for waterproofing pools, tunnels, and underwater structures
- Works well on wooden substrates
- Installs easily in nearly any weather
- Highly flexible and resistant to cracking or peeling
- Prevents snow, ice, and water accumulation from impeding vapor flow
- Roof lifespan: 30+ years; below-ground lifespan: 50+ years
Liquid Waterproofing Membrane
Liquid-applied membranes are highly flexible systems that form a seamless waterproofing layer. They typically consist of a primer and two topcoats applied by spray, roller, or trowel. Performance varies depending on the polymer base.
Features & Benefits:
- Very easy to apply
- Provides a seamless membrane
- Highly flexible and durable
- Strong adaptability to different surfaces
- High performance volume
- Excellent for green roofs, buried roofs, inverted roofs, and terraces
Mastic Asphalt Waterproofing
Mastic asphalt is a long-lasting material made from bitumen, fillers, sand, and aggregates. It has been used for centuries due to its resilience and adaptability, and it remains a cost-effective solution when considering lifecycle value.
Features & Benefits:
- Applied at ~35 mm thickness
- 100% recyclable and environmentally friendly
- Fire-resistant and extremely durable
- Resistant to chemicals, roots, and de-icing salts
- Suitable for structural screeds and subfloors
- Easy to maintain—cleaning requires only water
- Excellent longevity with low lifecycle costs
Protect Your Home from Water Damage Now!
No matter the situation, the right waterproofing or water-resistance system can be applied to solve the specific problem at hand. Just like any other part of construction or renovation, waterproofing must be planned carefully and intentionally. With so many types of waterproofing materials available, each with its own strengths, it’s important to understand what you need and what you expect from the final result.
As mentioned throughout this page, not all waterproofing materials perform the same. Taking the time to evaluate your options is essential to choosing the right solution for your project. To determine which system is best suited for your exact application, our team will assess your site, gather the necessary details, and provide informed recommendations based on multiple factors.
Our skilled professionals will offer a free quote along with several options that match your needs and budget. We make the entire process straightforward, transparent, and stress-free.
Get Started Today!
Contact us today for a free consultation and keep your property safe and dry.
Frequently Asked Questions
What basement waterproofing services do you offer in Ottawa?
We provide exterior and interior basement waterproofing, foundation crack repair, sump pump installation, weeping tile/drainage systems, crawl space encapsulation, and window well/drain upgrades—tailored to Ottawa’s soil and freeze–thaw conditions.
How do you diagnose the cause of a wet basement?
We start with a free on-site assessment: moisture mapping, exterior grading check, foundation wall inspection, and drain/sump review. You get a written plan with photos, scope, and a fixed quote before work begins.
What’s the difference between exterior vs. interior waterproofing?
Exterior: excavate to footing, repair cracks, apply membrane, install new weeping tile and drainage stone—best for stopping water before it enters.
Interior: install drainage channel and sump to manage water after entry—minimal disruption and faster timelines.
How long does a typical waterproofing project take in Ottawa?
Most interior systems finish in 1–2 days. Exterior waterproofing averages 3–5 days for a standard wall run, depending on access, length, and weather. We provide a clear schedule and daily updates.
Do you repair foundation cracks and is it permanent?
Yes. We inject cracks with high-grade polyurethane/epoxy and, for exteriors, add membrane and drainage. Done correctly, it’s a permanent solution backed by our written warranty.
Do I need a sump pump and battery backup?
If your home sits in a high water table area or experiences power outages, we recommend a reliable sump pump with a battery backup. It keeps your basement protected during storms and grid failures—critical for Ottawa’s spring melt.
What does basement waterproofing cost?
Costs vary by method and length: interior systems are typically more budget-friendly; exterior work depends on excavation length, depth, and access. After inspection, we provide a fixed, itemized quote with options to fit your budget.
What warranties and service areas do you offer?
We provide transferable warranties on most waterproofing systems and crack repairs. We serve Ottawa, Nepean, Kanata, Stittsville, Orleans, Gloucester, Barrhaven, and nearby communities. Fast scheduling and priority service for active leaks.