Blindside Waterproofing

Blindside Waterproofing Toronto

At Nusite Group, we specialize in blindside waterproofing projects in Toronto and the GTA. This advanced below-grade waterproofing system is essential for properties where traditional exterior excavation is not an option. As an experienced waterproofing contractor, we apply high-quality membranes and drainage systems before concrete is poured, ensuring long-term protection against water intrusion. Whether you’re building against an existing structure or in a tight urban space, our blindside waterproofing experts have the skills and experience to get the job done right.

With years of experience in commercial waterproofing, we understand the challenges of working in high-density areas like Toronto. Our team ensures proper installation using industry-leading materials that create a watertight barrier, preventing moisture from compromising your foundation. By choosing Nusite Group, you get a reliable waterproofing contractor dedicated to protecting your investment. Contact us today to discuss how our below-grade waterproofing systems can safeguard your commercial or residential project.

Nusite Group: Your Blindside Waterproofing Experts in Toronto

At Nusite Group, we provide expert waterproofing services in Toronto, specializing in blindside waterproofing for commercial and residential projects. With decades of experience serving Toronto and the GTA, our team understands the complexities of below-grade waterproofing and delivers solutions that protect foundations from long-term water damage. Whether you’re working on a high-rise, underground parking structure, or a tight urban site, we ensure that your waterproofing project is completed to the highest industry standards.

Successful blindside waterproofing depends on proper detailing and installation, and that’s where our expertise comes in. We use premium materials and proven techniques to create a seamless waterproofing process that prevents leaks and withstands hydrostatic pressure. From initial planning to final execution, we focus on durability, efficiency, and precision. If you need reliable waterproofing services in Toronto for your next waterproofing project, trust Nusite Group to get the job done right. Contact us today to learn more about our blindside waterproofing solutions.

What Is Blindside Waterproofing?

Blindside waterproofing is an advanced waterproofing solution designed to protect below-grade structures such as basements, foundation walls, retaining walls, and underground parking structures. Unlike traditional exterior waterproofing methods that require direct access to the outside of a structure, blindside waterproofing is applied before the concrete is poured. This technique ensures a durable, watertight barrier against moisture intrusion, even in areas with limited access.

The term “blindside” refers to the fact that the waterproofing is installed without direct visibility or access to the foundation walls after construction. Instead, high-performance membranes and drainage systems are placed on the soil-facing side of the structure, allowing for seamless below-grade waterproofing before backfilling or site development. This method is particularly useful in urban environments or tight construction sites where traditional exterior waterproofing isn’t feasible. By proactively sealing the structure from water before it’s built, blindside waterproofing provides long-lasting protection against leaks, foundation deterioration, and moisture-related damage.

The Benefits of Blindside Waterproofing

Blindside waterproofing provides several key advantages for below-grade structures, especially in areas where exterior waterproofing may not be possible. This method ensures long-term protection against water damage and structural deterioration. Here’s why it’s a smart investment:

Ideal for Space-Constrained Sites – In dense urban environments or sites with limited excavation space, a blindside application allows waterproofing to be installed before construction, eliminating the need for external access.
Superior Protection Against Water Damage – By forming a continuous barrier on the soil-facing side of the structure, blindside waterproofing prevents leaks, mold, and moisture-related deterioration.
Resists Hydrostatic Pressure – Unlike traditional exterior waterproofing, blindside membranes are designed to withstand hydrostatic pressure, ensuring long-term waterproofing in areas with high groundwater levels.
Reduces Future Repair Costs – Since the waterproofing is installed before backfilling, it remains protected from potential damage and eliminates the need for costly excavation or repairs later on.

When Blindside Waterproofing Is Typically Used

Blindside waterproofing is a reliable blindside waterproofing option for projects where traditional excavation-based methods are not feasible. It is commonly used in the following situations:

Tight Urban Construction Sites – In densely built areas, where excavation space is minimal, blindside waterproofing allows for effective protection without needing exterior access.
Underground Parking Structures – High-rise buildings and commercial properties often require basement waterproofing for underground parking levels, where water infiltration is a major concern.
Buildings with Adjacent Structures – When construction takes place next to existing buildings, excavation for traditional waterproofing is impossible, making blindside waterproofing the best solution.
High Water Table Areas – Properties in Toronto and the GTA often face groundwater challenges. Waterproofing in Toronto requires solutions that can withstand hydrostatic pressure and prevent long-term moisture issues.
Retaining Walls and Foundations – Blindside waterproofing is ideal for deep foundation walls and retaining structures that need protection from soil moisture and water intrusion.

For commercial and residential projects that require advanced basement waterproofing, blindside waterproofing offers a proactive, long-lasting solution to keep structures dry and protected.

Common Materials Used in Blindside Waterproofing Are:

Pre-Applied Membranes:

– Pre-applied waterproofing membranes are typically composed of bitumen, rubberized asphalt or other synthetic materials.

– These membranes are manufactured with a self adhesive backing, heat bonded to the exterior surface of the structures foundation once concrete is placed.

– They form a continuous barrier that adheres tightly to the substrate, providing excellent waterproofing protection when it is applied correctly.

Self Adhered Membranes:

– Self adhered membranes are similar to pre-applied membranes but are designed to adhere directly to the substrate without the need of additional adhesives or heating.

– These membranes often feature mechanical and or chemical bonding characteristics that adhere to the concrete foundation once the concrete is cast.

Bentonite Sheets:

– Bentonite waterproofing sheets consist of sodium bentonite clay sandwiched between geo-textile or polymer sheets.

– When hydrated, bentonite cal forms a self-sealing barrier that swells to fill voids and cracks, effectively preventing water penetration.

– Bentonite sheets are typically applied by adhering them to the exterior surface of the structure, where they provide reliable waterproofing protection.

Liquid Applied Waterproofing Systems:

Liquid applied waterproofing systems consist of liquid coatings or membranes that are applied directly to the substate using different methods of post applied blindside waterproofing.

– These systems are versatile and can be applied to irregular surfaces, penetrations and corners to create a seamless waterproofing barrier.

– Liquid applied membranes involve elastomeric coatings, polyurethane membranes, acrylic membranes or poly-gel membranes which get injected once the walls are installed through pre-installed ports or post applied via drilled holes/injected.

– Cementitious membranes are installed after the walls are up and are applied on the inside of the work or added to the concrete to ensure waterproofing is in place.

Each type of blindside waterproofing has its advantages and disadvantages and is deleted based on a lot of factors like substrate, site conditions, conventional concrete forming vs shot-crete, weather, scheduling and timing issues, and lastly warranty requirements. By choosing the appropriate material and installation method, blindside waterproofing can effectively protect below-grade structures from water infiltration and damage.

Our Clients Are

Construction Managers

Project Managers

Property Managers

Asset Owners

Cooperatives

Government and ICI

Architects

Consulting Engineers

Manufacturers

FAQ

When is blindside waterproofing necessary for a construction project?

Blindside waterproofing is essential in situations where excavation space is limited, such as urban construction sites in Toronto and the GTA. It’s commonly used for underground parking garages, high-rise buildings, and properties built adjacent to existing structures. This reliable blindside waterproofing option ensures long-term water protection in challenging conditions.

How does blindside waterproofing compare to traditional basement waterproofing?

Unlike standard basement waterproofing, which is applied after construction, blindside waterproofing is installed beforehand, preventing water intrusion from the very beginning. It’s particularly effective in areas with high water tables and hydrostatic pressure, making it a superior choice for many commercial and residential projects.

What are the key factors for successful blindside waterproofing installation?

The success of a blindside waterproofing project depends on proper detailing and installation, high-quality membranes, and expert application. Choosing an experienced waterproofing contractor in Toronto ensures that the system is correctly installed and provides long-lasting moisture protection.

How can I find a trusted blindside waterproofing contractor in Toronto?

When looking for waterproofing services in Toronto, it’s crucial to choose a company with experience, positive reviews, and a strong portfolio of completed projects. Nusite Group is a leading provider of blindside waterproofing in Toronto and the GTA, offering expert solutions tailored to commercial and residential needs. Contact us today for a consultation!

Do you provide Maintenance and Aftercare services?

Yes, we provide mainteneance programs and consulting for all of your waterproofing needs.