Interior Waterproofing Services
Expert Solutions from NC Construction & Waterproofing — Serving the Greater Toronto Area
When exterior access is limited — or when a basement is already experiencing moisture intrusion — interior waterproofing becomes a smart, effective solution. At NC Construction & Waterproofing, we deliver custom interior waterproofing systems that stop leaks, control moisture, and protect your foundation from the inside out.
Whether you're dealing with occasional dampness or persistent flooding, our team is here to restore your basement to a clean, dry, and usable space — with long-lasting results you can trust.
What Is Interior Waterproofing?
Interior waterproofing involves the installation of moisture control systems inside your basement or foundation walls. This method is ideal when exterior excavation is not feasible, or when water is already seeping into the home. It redirects water away from your foundation and into a sump pump or drainage outlet — keeping your basement dry and protected year-round.
It’s a proven, minimally invasive way to defend against water damage, especially in older homes or in high-risk flood zones across the Greater Toronto Area.
Our Interior Waterproofing Process
At NC Construction & Waterproofing, we take a meticulous approach to every interior system, ensuring it’s tailored to the unique structure of your home.
1. Inspection & Diagnosis
We begin with a thorough inspection to identify water entry points and assess the condition of your basement walls and floor.
2. Trench Excavation Along Interior Walls
A narrow trench is carefully cut along the perimeter of the basement floor, exposing the footing and foundation wall base.
3. Installation of Interior Drainage System
We install a perforated drainage pipe (weeping tile) in the trench, surrounded by clean gravel and connected to a sump pump or floor drain to divert water safely out of the home.
4. Wall Treatment (Optional)
For added moisture control, we apply a vapor barrier or drainage membrane to the interior foundation walls to direct water into the drainage system.
5. Re-cementing the Floor
The trench is sealed with fresh concrete, restoring the basement floor to its original finish — clean, smooth, and watertight.
What Is Interior Waterproofing?
Interior waterproofing involves the installation of moisture control systems inside your basement or foundation walls. This method is ideal when exterior excavation is not feasible, or when water is already seeping into the home. It redirects water away from your foundation and into a sump pump or drainage outlet — keeping your basement dry and protected year-round.
It’s a proven, minimally invasive way to defend against water damage, especially in older homes or in high-risk flood zones across the Greater Toronto Area.
The Benefits of Interior Waterproofing
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Effective Moisture & Flood Control
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Stops Active Leaks from the Inside
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Creates a Healthier Basement Environment
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Helps Prevent Mold, Mildew & Odors
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No Exterior Excavation Required
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Ideal for Finished Basements & Limited Access Sites
Why Choose NC Construction & Waterproofing?
As a trusted name in foundation repair and waterproofing across the GTA, NC Construction & Waterproofing delivers results with integrity, expertise, and quality materials. Our interior systems are professionally installed, designed to last, and backed by knowledgeable, responsive service.
đź“Ť Proudly Serving: Toronto, Mississauga, Brampton, Vaughan, Richmond Hill, Markham & Surrounding Areas
Schedule Your Free Consultation
Whether you're preparing for a renovation or responding to water damage, trust NC Construction & Waterproofing to install a custom interior waterproofing system that protects your home from the ground up.