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Foundation Waterproofing Protect Your Home from Water Infiltration

Protect your home against water infiltration and moisture with our lasting waterproofing solutions.

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(514) 623-9155

Protecting your foundations against water infiltration and humidity is essential to the durability of your building. At Solution ProFissure, we deliver complete foundation waterproofing solutions, tailored to the Quebec climate and to residential and commercial properties across Greater Montreal, the Laurentians, Laval, and Lanaudière.

With more than 1,300 satisfied customers and 30 years of experience, we are your trusted partner.

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Why foundation waterproofing is essential in Quebec

Foundation waterproofing isn’t a luxury in Quebec — it’s a necessity. The soil holds moisture year-round and regularly receives sudden water loads: heavy rainfall, snowmelt, surface runoff, and high water tables. Without adequate protection, this water exerts hydrostatic pressure on your foundation walls and eventually seeps through, causing mold, settling, and structural damage. To recognize the early warning signs, see our guide how to tell if a foundation crack is serious.

Despite its solid appearance, concrete is not naturally waterproof. Under constant exposure to moisture, it acts like a sponge and breaks down. The main causes of infiltration are shrinkage cracks, poorly sealed cold joints, surface deterioration, inadequate drainage, and homes built on flood-prone land or above a high water table.

When a crack appears, water seeps in, freezes, and widens it every winter. Our foundation crack repair service uses polyurethane injection to seal the breach, while exterior waterproofing creates a complete barrier. To dig deeper, read how to repair water infiltration in a basement wall.

The freeze-thaw cycle is enemy number one for Quebec foundations. Each winter, water that enters cracks freezes, expands, and widens those openings. Combined with the movement of clay-rich soils and the spring thaw, this phenomenon gradually weakens your concrete.

Waterproofing built for the Quebec climate is therefore indispensable. An elastomeric membrane stays flexible even in extreme cold, unlike rigid solutions that crack.

If your foundation cracks grow wider from one spring to the next, see when to worry about foundation cracks.

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Our exterior foundation waterproofing process

Our exterior foundation waterproofing process follows a rigorous methodology, proven across more than 350 projects in 2024. We assess each client’s specific needs, diagnose infiltration problems, and propose a tailored solution.

Here are the four main stages:

  1. Excavation and cleaning of the foundation walls (1 to 2 days)
  2. Installation of a sump basin and sump pump if needed (1 to 2 days)
  3. Application of waterproofing membranes and replacement of the French drain (1 day)
  4. Backfilling and finishing around the foundation (1 to 2 days)

The first step is to dig out the perimeter of the foundation down to the footing. Our team carries out a careful excavation to expose the foundation walls without damaging the property or the surrounding landscaping.

Once the foundation is exposed, we thoroughly clean the concrete surface to remove all traces of soil, debris, or old membrane. This preparation is critical: a clean surface guarantees optimal adhesion of the waterproofing products applied next.

When the situation calls for it, we install a sump basin and sump pump to evacuate water that accumulates around the foundation. This is recommended when the water table is high, the soil drains poorly, or the home sits in a wet zone. The basin collects groundwater and the pump discharges it well away from the foundation.

Many homeowners aren’t sure whether their home has a proper drainage system. To find out, read how to tell if your house has a French drain.

This is the key stage. We apply waterproofing membranes directly onto the clean, dry foundation: the Delta-MS drainage membrane, liquid rubber membrane, asphalt-based coating, or polyurethane membrane, depending on the requirements of the site.

While the excavation is open, we replace or install the French drain at the base of the foundation. The drain channels groundwater away from the building, and the membrane prevents any infiltration. To understand how this system works, read how a French drain works.

Once the membranes are applied and the drain is installed, we backfill the perimeter carefully. The soil is replaced layer by layer and compacted to prevent any future settling.

Our goal: your property looks the way it did before. Lawn, landscaping, and pavers are put back in place with care. A durable finish is part of our commitment, because the quality of waterproofing is also judged by what you see once the work is done.

Request your free foundation waterproofing quote

Free estimate, callback guaranteed within 24 hours. Our specialists travel to your site to assess your situation and provide a detailed quote, with no obligation.

Get your free quote within 24h

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Available 24/7 for water infiltration emergencies in Quebec.

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The types of foundations we waterproof

Quebec buildings feature several types of foundations depending on their age and method of construction. Our crews are experienced in waterproofing all the common types: poured concrete, concrete block, rubble stone, and natural stone. Each type calls for a specific approach.

The poured concrete foundation built with conventional formwork is the most common method in modern residential construction in Quebec. Its uniform surface lends itself well to liquid membrane application, such as liquid rubber or polyurethane.

On this type of foundation, we pay special attention to the weak points: cold joints between concrete pours, areas around the conduits passing through the wall, and the angles of the footing. Preventive sealing of these zones ensures a watertight barrier with no points of failure.

Concrete block and rubble stone foundations are typical of older Quebec homes. Mortar joints deteriorate over time, and water seeps between the blocks or stones, leading to chronic basement humidity.

For this type of foundation, waterproofing usually goes hand in hand with concrete block and rubble stone foundation repair to repoint or reinforce the structure before the membranes are applied. This two-step approach delivers a foundation that is both solid and watertight for decades.

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The membranes and materials used to waterproof your foundations

We use only premium-grade materials to waterproof your foundations. The choice depends on the foundation type, the site environment, and the homeowner’s preferences. Our techniques, paired with our attention to detail, deliver lasting results.

The Delta-MS drainage membrane is a dimpled high-density polyethylene panel that fastens to the foundation. Its structure creates a drainage channel that directs water toward the French drain, preventing direct contact between water and the wall.

The elastomeric membrane is a waterproof, flexible coating applied directly to the concrete. It stays elastic even in extreme cold and absorbs the micro-movements of the concrete without cracking. Combined with Delta-MS, it represents the gold standard for long-lasting waterproofing.

Asphalt-based coating is used in some contexts, but its limited lifespan and rigidity make it less effective against the freeze-thaw cycle.

Polyurethane and liquid rubber membrane offer superior watertightness: they are applied as a continuous layer, conform to every imperfection in the concrete, and remain flexible for years. These are our recommendations for most residential projects aimed at long-term durability.

Exterior or interior waterproofing — which solution should you choose?

  • Exterior waterproofing is always the most effective solution: it stops water before it reaches the concrete. This is the method we favor, because it treats the problem at its source. The upfront investment is higher because of the excavation, but the protection is complete and durable.
  • Interior waterproofing, through an interior French drain or basement membrane system, is a valid alternative when exterior excavation isn’t possible: tight lots, additions, immediate neighbors, or urban constraints. It manages water that has already entered, but when properly installed, it effectively protects the basement against humidity and mold.

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Our transferable 25-year warranty on foundation waterproofing

Solution ProFissure offers a transferable 25-year warranty on its waterproofing work, one of the strongest in the Quebec industry. This warranty isn’t just a commitment to you — it’s also an asset when you sell: it transfers to the next owner, adding value to your home.

Why choose Solution ProFissure for your waterproofing project

We are a family-run company specialized in foundation waterproofing and foundation repair for over a decade. More than 1,300 satisfied customers and 350 projects completed in 2024 speak to our commitment to quality. Here’s what sets us apart:

  • Premium quality: work executed to the most demanding standards for strength and durability
  • Fast 24/7 estimates: available 24/7, callback and free estimate within 24 hours
  • Trust and transparency: detailed quotes, ongoing communication, no surprises
  • Personalized approach: solutions adapted to your situation for lasting results
  • On-time delivery: start dates and deadlines always respected
  • Transferable 25-year warranty, backed by our RBQ license 5770-6285-01

Discover our full range of foundation services, from foundation crack repair to French drain installation.

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Foundation waterproofing project showcase

Discover some of our recent foundation waterproofing projects across Greater Montreal, the Laurentians, Laval, and Lanaudière. Each project reflects the expertise and attention to detail of our crews, and each home protected is a family with peace of mind for the decades to come.

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Service areas across Greater Montreal, the Laurentians, Laval, and Lanaudière

Service areas

Our crews serve a wide territory in southern Quebec: Greater Montreal, the Laurentians, Laval, and Lanaudière. This includes Saint-Jérôme, Sainte-Sophie, Saint-Calixte, Saint-Colomban, Saint-Sauveur, Mirabel, Sainte-Adèle, Oka, Saint-Eustache, Terrebonne, Mascouche, Lachute, Rosemère, and Sainte-Marthe-sur-le-Lac, among others.

Our headquarters are in Sainte-Sophie, allowing us to respond quickly across the entire region. Whether you live in Laval or in a more remote municipality of the Laurentians, we travel to assess your foundation.

Get your free foundation waterproofing assessment within 24h

A dry foundation means a home protected for decades. Reach out: one of our specialists will call you back within 24 hours to schedule your assessment.

Get your free foundation waterproofing assessment

Free Estimate
(514) 623-9155

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Frequently asked questions about foundation waterproofing

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How much does foundation waterproofing cost in Quebec?

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The cost of foundation waterproofing in Quebec varies based on several factors: perimeter length, excavation depth, foundation type, site access, and the products used. That's why we always provide a free, personalized quote, with no obligation.

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What's the difference between waterproofing and asphalt coating?

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Asphalt coating is simply a layer of tar applied to the foundation: limited protection, no resistance to cracks or to the freeze-thaw cycle. Complete foundation waterproofing combines excavation, French drain, elastomeric membrane, and drainage membrane to create a durable watertight barrier. It's the difference between a quick patch and long-term protection.

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How long does foundation waterproofing work take?

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The duration of foundation waterproofing work typically runs between 4 and 7 days depending on the size of the home and site conditions: 1 to 2 days of excavation, 1 day for the membranes and drain, 1 to 2 days for the sump basin if needed, and 1 to 2 days for backfilling.

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When should you waterproof your foundations?

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You should waterproof your foundations at the first signs: damp patches in the basement, musty odor, efflorescence, cracks that are widening, visible water after rainfall, or seepage at the spring thaw. Better to prevent than to repair.

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Is waterproofing guaranteed against water infiltration?

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Yes. Solution ProFissure offers a transferable 25-year warranty on its work, covering infiltration at treated areas. The warranty transfers to the next owner, adding value to your home. Contact us for an assessment.