Waterproofing Experts in Markham
Markham homes face specific waterproofing challenges due to clay-based soil, rapid urban development, and increasing seasonal rainfall. These conditions can lead to water buildup around foundations, basement leaks, and long-term structural issues if not properly addressed.
At Leaquida Waterproofing, we provide solutions tailored to local conditions in Markham — from older properties with aging drainage systems to newer homes affected by poor grading or surface runoff. Our approach focuses on identifying the exact source of water intrusion and delivering targeted solutions that prevent recurring problems.
Why choose us?
- Respectful
appearance - Up-front
pricing - No overtime
charge - We are available on holidays, evening and weekends
- Quick and
efficient service - 24/7 customer
service
We are the best in the field!
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Fully licensed
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Transparent process
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Insured
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Affordable
Basement Waterproofing Solutions in Markham
Basement water problems in Markham are often linked to dense soil conditions, seasonal groundwater fluctuations, and heavy rainfall. These factors increase pressure around foundations, allowing moisture to enter through cracks, joints, and weak points.
Every property requires a different waterproofing approach depending on foundation type, drainage conditions, and exposure to water. That’s why it’s important to identify the exact source of the issue — whether it’s surface water, hydrostatic pressure, or drainage failure — before selecting a solution.
We provide a range of targeted basement waterproofing solutions, including interior and exterior systems, sump pump installation, window well protection, french drains, and backwater valve systems — all designed to prevent recurring leaks and protect your basement long-term.
Comprehensive Waterproofing Solutions
At Leaquida Waterproofing, we specialize in delivering high-performance waterproofing systems tailored to protect structures from water ingress, structural deterioration, and moisture-related issues. Our approach is based on the latest technologies and industry best practices.
Types of Waterproofing We Provide
- Coating (Obmazochnaya) Waterproofing. A liquid-applied method using polymer-modified bitumen, polyurethane, or cementitious compounds. Once cured, it forms a seamless and elastic waterproof barrier. Ideal for: Retaining walls, wet areas, balconies, and below-ground structures.
- Sheet (Roll-on) Waterproofing. Installation of prefabricated membrane sheets such as SBS-modified bitumen or PVC membranes. Application is done through heat welding or cold-adhesive methods. Ideal for: Flat roofs, parking decks, basements, and foundation slabs.
- Injection Waterproofing. A remedial solution involving pressure injection of polyurethane or epoxy resins directly into cracks, construction joints, or voids. Ideal for: Leak repairs in tunnels, basements, water tanks, and concrete structures.
- Crystalline (Penetrating) Waterproofing. Chemical treatment that reacts with moisture and unhydrated cement particles inside concrete, forming insoluble crystals that seal capillaries and micro-cracks.Ideal for: Foundations, slabs, water tanks, and underground facilities.
- Membrane Waterproofing (Liquid or Sheet). Flexible waterproof membranes, either roll-applied or spray/liquid-applied, offering durable and chemical-resistant sealing.Ideal for: Green roofs, terraces, podiums, and wet environments.
Key Areas of Application
- Foundations & Basements. We implement multi-layered systems combining crystalline and membrane methods to prevent groundwater penetration, capillary action, and structural weakening.
- Roofs & Terraces. Our solutions include UV-resistant, weatherproof membranes that offer long-term protection against thermal expansion, rain, and standing water.
- Bathrooms, Saunas & Swimming Pools. We utilize elastic and chemical-resistant coatings under tile systems to ensure a completely sealed moisture barrier, critical in areas with constant water exposure.
- Balconies & Loggias. We apply flexible membranes and protective screeds designed to withstand freeze-thaw cycles, mechanical stress, and weathering.
- Underground Parking & Tunnels. High-performance injection and sheet systems safeguard these spaces against hydrostatic pressure, leaks, and chloride penetration from road salts.
Quick, professional and at very reasonable cost. No hidden costs. The installation was complicated as the municipal sewage backed up when the pipe was cut, but the team did not complain despite working in harsh conditions.
Lev, Whitby
Leaquida Waterproofing was prompt, courteous and thorough. We would recommend to anyone. We had a backwater valve installed. I called Sunday, got a quote Monday, has the work done the following Monday (including issuing of building permit).
Trisha Grant
They have installed sump pump system in our house. They were very much on time and during the installation they have worked very clean.
You may rely on their advises.
Highly recommended.
Burçin, Toronto
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EXTERIOR
Exterior waterproofing is one of most efficient and reliable ways to perform waterproofing of your property.
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INTERIOR
Interior waterproofing might be as part of complex solution for the external waterproofing.
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SUMP PUMP
There are 2 possible ways to discharge water from weeping tile system. The first solution is a gravity.
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WINDOW WELL
One of most common places for water penetration is right below the basement window frame.
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FRENCH DRAIN
The French drain is required in order to re-direct water away from your house.
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Back Water Valve Installation
There are 2 possible ways to discharge water from weeping tile system. The first solution is a gravity.
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Common Causes of Basement Leaks in Markham
Basement leaks in Markham are typically caused by a combination of soil conditions, urban drainage challenges, and seasonal weather patterns. Identifying the exact source of water intrusion is essential for choosing the right waterproofing solution.
Common causes include:
- Clay-based soil expansion — Markham’s soil tends to retain water, increasing pressure against foundation walls and forcing moisture inside
- Hydrostatic pressure — excess groundwater builds up around the foundation during heavy rain or snowmelt, leading to leaks through cracks and joints
- Foundation cracks and wear — even small structural gaps can allow water to enter over time
- Aging drainage systems — older homes may have clogged or failing weeping tile systems
- Poor surface drainage — improper grading or blocked gutters can direct water toward the foundation
- Window well leaks — insufficient drainage or sealing around basement windows
- Sewer backup risk — during intense rainfall, municipal systems may become overloaded
Understanding these causes helps ensure that waterproofing is focused on the root of the problem, not just the symptoms.
Flood-Prone Areas in Markham
Certain areas in Markham are more vulnerable to basement flooding due to their elevation, soil composition, and surrounding infrastructure. Homes located near waterways or in rapidly developed neighbourhoods often face higher risks of water intrusion.
Areas with increased flood risk may include:
- Unionville and surrounding low-lying areas — proximity to water and older infrastructure can contribute to drainage challenges
- Milliken and south Markham — dense development and runoff from paved surfaces increase water accumulation
- Thornhill (Markham side) — aging systems and mixed soil conditions may affect drainage performance
- Cornell and newer subdivisions — grading issues and fast development can impact proper water flow
- Areas near Rouge River and tributaries — higher groundwater levels and floodplain influence
Even if your home is not in a known flood-prone zone, basement leaks can still occur due to localized drainage or foundation issues.
Basement Flooding Seasons in Markham
Basement flooding in Markham can occur at any time of year, as different seasons bring different types of water-related risks.
Spring (March–May)
Snowmelt combined with seasonal rainfall raises groundwater levels, increasing pressure around foundations and causing leaks.
Summer (June–August)
Heavy thunderstorms and sudden downpours can overwhelm drainage and sewer systems, leading to water backup and basement flooding.
Fall (September–November)
Leaves and debris can clog gutters and drains, preventing proper water flow and causing accumulation around the foundation.
Winter (December–February)
Freeze-thaw cycles can expand existing cracks in foundation walls, allowing water to seep in even during colder months.
Understanding these seasonal patterns helps homeowners take preventive measures and choose the right waterproofing system for long-term protection.
Locations We Service
Why Choose Leaquida Waterproofing?
At Leaquida Waterproofing, we believe that our commitment to quality and customer satisfaction sets us apart from other waterproofing companies. We have a reputation for providing reliable and high-quality service to all our clients, and we’re committed to using only the latest techniques and materials to ensure that your property stays dry and secure. In addition, we offer competitive pricing and a satisfaction guarantee, so you can be sure that you’re getting the best value for your money. When you choose Leaquida Waterproofing, you can have peace of mind knowing that your property is in the hands of experts who are dedicated to providing the best possible service.
Basement Waterproofing Contractors in Markham
When it comes to choosing a contractor for your basement waterproofing needs, it’s important to work with a team that has the right skills and expertise to get the job done right. At Leaquida Waterproofing, our team of highly skilled contractors has years of experience in the industry, and we use only the best materials and techniques to ensure that your basement stays dry and free from water damage. We work closely with our clients to understand their unique needs and provide a tailored solution that meets their specific requirements. Whether you’re dealing with a small leak or a major flood, we have the resources and expertise to provide the solution that’s right for you. With our commitment to quality and customer satisfaction, you can be sure that you’re getting the best possible service when you choose Leaquida Waterproofing.
CLOGGED OR BROKEN WEEPING TILE