Basement Waterproofing in Ottawa, ON

Ottawa Basement Waterproofing Specialists

Are you searching for a reliable and experienced basement waterproofing company near me in Ottawa, Ontario?

Do you need help repairing foundation damage caused by flooding, or addressing leaking cracks in your basement or crawl space?
Even if your basement isn’t currently flooded, that doesn’t mean it’s fully protected. Water can accumulate in hidden areas, creating a false sense of security until serious issues begin to surface.

Unchecked moisture problems can weaken the very foundation your home rests on. The longer these issues are ignored, the more severe — and costly — they can become.
Left untreated, water intrusion can seriously compromise the structural integrity of your property. Water is persistent, and it silently finds its way into any gap, crack, or vulnerable area it can access.

When waterproofing is inadequate, even small openings can become major sources of leaks. We’ve seen situations where water enters through compromised roofing, works its way between interior and exterior walls, and eventually ends up in the basement.
If you notice water seeping through basement walls or floors, visible cracks, damp spots, or even bowing walls, don’t delay. These problems can escalate quickly and result in significant flooding inside your home.

At Superior Waterproofing Ottawa , we offer a full range of repair products and techniques — each tailored to address specific sources of leaks within foundation walls and concrete floors in basements and below-grade structures.

We’ve been helping homeowners throughout the Ottawa region dry out their wet basements for years. There’s no flooding or leakage problem we haven’t been able to repair. Our certified technicians are carefully selected, highly trained, and committed to delivering fast, effective, and long-lasting solutions. No job is too large or too small.

We can help protect your home too. Fill in the contact form below, or give us a call, and we’ll send one of our basement waterproofing experts to provide a free, no-obligation estimate. Our goal is simple: to keep your basement dry all the time.

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Repairing Leaking Cracks

Water has a way of appearing where you least expect it. It can enter through any opening in the foundation — not only visible wall or floor cracks, but also around pipe penetrations and other structural gaps.

Our Services Include:

Sealing Wall Cracks & Pipe Penetrations
Repairing Leaky Floor Cracks
Preventing Window Well Flooding
Structural Foundation Repair
Basement Crack Repair
Stairwell & Window Well Drainage Solutions
Interior & Exterior Drainage Systems
Sump Pump Installation & Maintenance

Polyurethane Waterproofing

Polyurethane liquid membrane is one of the most widely used waterproofing materials. It’s suitable for pedestrian decks, water tanks, ponds, balconies, roofs, bridges, parking decks and more. This versatile material provides excellent flexibility and deep penetration.

Features & Benefits:

Ideal for decks, water tanks, balconies, roofs, bridges, and parking decks
Seamless coating, even on small or irregular areas
Easy application on almost any surface
Deep surface penetration
High elasticity
Only 2 mm needed for application thickness
Fast service readiness
Lightweight after curing — works well on light structures
High UV resistance
Suitable for DIY or professional use
Long service life (25–50 years)

Cementitious Coating Waterproofing

Cementitious coatings are made from powder blends of sand, chemicals, and silica-based materials. When mixed with water or lime, they create a durable waterproof seal. This method is simple to apply and often used in residential settings.

Features & Benefits:

Ideal for water-retaining structures, tunnels, tanks, and treatment facilities
Excellent for foundations, walls, sidewalks, and walkways
Easy application (brush, roller, or spray)
Suitable for industrial and underground uses
Great for bathrooms, toilets, and shower areas
Available in spray and liquid forms

EPDM Rubber Waterproofing

EPDM is a synthetic rubber membrane commonly used for roofing. Made from ethylene and propylene, it offers strong resistance to moisture, UV rays, and weathering. It’s also used in automotive and HVAC applications.

Features & Benefits:

Ideal for flat roofs and roof repairs
Used for door, window, and trunk seals
Excellent for outdoor applications
Low electrical conductivity
Steam and water resistant
Highly durable against UV, ozone, aging, and chemicals
Common in automotive, HVAC, and roofing industries

Rubberized Asphalt Waterproofing

Rubberized asphalt is a hot-applied fluid membrane made from asphalt and modified rubber polymers. It requires precise heating but delivers excellent waterproofing for heavy-duty applications.

Features & Benefits:

Used for bridges, plazas, parking structures, and commercial roofs
Seamless monolithic application
Conforms to surface defects
Strong adhesion prevents lateral water movement
100% solids formula with fast cure
Flexible with low permeability
Ideal for podium decks, balconies, parking decks, vegetative roofs, and more

Bituminous Membrane Waterproofing

Bituminous membranes consist of layers of bitumen (asphalt) bonded to fabric or film. They are widely used for roofs, basements, and below-grade structures and dominate much of the global flat-roof market.

Features & Benefits:

Used under tiles on terraces, balconies, basements, and underground structures
Great for podiums, bridge decks, tanks, and retaining walls
Long history of reliability — also used in road construction
Fully bonded system
Resistant to severe weather
Strong and puncture-resistant
Easy to maintain

Thermoplastic Waterproofing

Thermoplastic membranes soften when heated, allowing seams to be welded for a fully sealed assembly. Though not the cheapest option, they are extremely durable.

Features & Benefits:

Common for foundation walls, tunnels, plaza decks, green roofs, and zero-lot-line construction
Used in pharmaceutical and industrial applications
Suitable for tanks, pits, fountains, slabs, and decks
Service life often exceeding 75 years
Flexible liquid-applied options available
Airtight and watertight barrier
Durable and versatile

Bituminous Coating Waterproofing

Also called asphalt coating, this material is excellent for concrete foundations and provides a protective waterproof layer. It is not UV-resistant unless modified with flexible compounds.

Features & Benefits:

Suitable for roofs, basements, concrete decks, terraces, and more
Non-toxic to humans
Can incorporate polyester, glass fabric, or fiberglass
Easy to apply
Great for complex or uneven surfaces
No heating required
Typically applied at a 2 mm thickness

PVC Waterproofing Membrane

PVC membranes are single-ply roofing systems reinforced with polyester. They offer strong durability, flexibility, and long-term waterproofing performance.

Features & Benefits:

Ideal for walkable surfaces (sundecks, patios, balconies, pool surrounds)
Designed for harsh Canadian weather and heavy foot traffic
Suitable for tunnels, swimming pools, and underwater structures
Can be applied over wood or concrete
Installs in almost any weather
Will not peel, crack, or delaminate
Prevents moisture buildup and vapor blockage
Lifespan: 30+ years for roofing, 50+ years underground

Liquid Waterproofing Membrane

A liquid-applied membrane typically includes a primer and two topcoats. It offers greater flexibility than cementitious systems and adapts well to complex surfaces.

Features & Benefits:

Very easy to apply
Seamless finish
Highly flexible and durable
Strong adhesion
Versatile for many applications
Ideal for green roofs, buried roofs, inverted roofs, and terraces

Mastic Asphalt Waterproofing

Mastic asphalt combines bitumen, fillers, sand, and aggregates to create a strong, long-lasting waterproof layer. It has been used for centuries and remains highly reliable today.

Features & Benefits:

Typically applied at 35 mm thickness
100% recyclable and environmentally friendly
Fire-resistant and extremely durable
Resistant to chemicals, roots, and salt
Easy to maintain — only water needed for cleaning
Very low long-term maintenance costs

Bituminous Coating Waterproofing

Choosing the Right Waterproofing Material

Every waterproofing material serves a specific purpose. Since each project has unique needs, planning waterproofing early in the construction or renovation process is vital.

Our team will assess your structure, identify potential risks, and recommend the best waterproofing solution based on your goals, budget, and building conditions.

We provide free quotes, expert recommendations, and a simple, stress-free process to ensure your property stays dry and protected for years to come. We can be contacted by filling out our online contact form by clicking here, or pick up the phone and give us a call . We’re looking forward to answering any questions you may have.