Let’s explore what causes basement floor leaks and how you can stop them.
Why Is Water Coming Through the Basement Floor?
1. Hydrostatic Pressure
When the ground around your home becomes saturated, water presses against your foundation. If the pressure gets too high, it forces water up through floor cracks or joints.
2. Poor Drainage
Clogged or missing weeping tile systems, broken sump pumps, or poor grading around the foundation can lead to standing water near the foundation, which increases seepage risk.
3. Cracks in the Floor Slab
Even hairline cracks can allow water to seep into your basement—especially if there’s no waterproof membrane beneath the floor.
Effective Solutions to Stop Water From Coming Up Through the Floor
Now that you know the causes, here’s how to stop basement floor leaks effectively:
1. Install or Repair a Sump Pump
A sump pump collects and pumps out water that gathers under your basement floor. If you don’t have one—or if yours isn’t working—you’ll need a Sump Pump Installation in Toronto or repair service to prevent water build-up.
2. Add a French Drain or Weeping Tile System
These systems collect groundwater before it reaches your foundation. Consider Weeping Tile Installation or French Drain Installation to keep the area around your foundation dry.
3. Seal Cracks and Floor Joints
Crack injection or epoxy sealants can block water entry points. Basement Crack Repair is a proven method used by professionals to create a watertight seal.
4. Install a Basement Waterproofing System
An interior waterproofing system involves placing drainage pipes and a sump basin beneath the floor to intercept water before it rises. Explore Leaky Basement Repair in Toronto for customized options.
5. Improve Exterior Drainage
Make sure the grading around your home slopes away from the foundation. Also, install or clean gutters and downspouts to direct water at least 6 feet from the house.
Preventing Future Water Issues

Once your basement is dry, keep it that way with these ongoing maintenance tips:
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Test your sump pump every 3–6 months.
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Inspect and clear gutters at least twice a year.
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Check your foundation and floor for new cracks regularly.
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Schedule annual drain inspections using Drain Camera Inspection services to spot hidden issues.
Why Trust MT Drains & Plumbing?
Fixing Toronto’s leaky basements for 30+ years, MT Drains & Plumbing is your trusted choice in the GTA. Fully licensed and insured, we offer long-term solutions that protect your home—not just quick fixes. Whether you need internal waterproofing, Trench Drain Installation, or Main Water Line Replacement, our skilled team is here to help.
We’ve solved thousands of basement water problems—and we back our work with strong warranties and great reviews.
Need Help Now?
If you’ve got water coming through your basement floor, don’t wait. It won’t fix itself—and it won’t get better with time.
Contact MT Drains & Plumbing today for a free inspection and customized waterproofing plan that keeps your basement safe and dry for years to come.