How We Fix Leaky Basements
We are Toronto's basement waterproofing specialists and guarantee all waterproofing work with a 20-year transferable warranty. We diagnose and fix leaky, wet basements — giving homeowners new space they can use in their homes.
Whether your basement has a small leak, dampness, or visible water entry, we'll find the source and recommend the right solution — exterior waterproofing, interior waterproofing, or a combination of both.
Local waterproofing proof
Waterproofing Examples We See Around Toronto
These are common project types we inspect in older Toronto and Mississauga homes, and they help keep this page specific to real local conditions instead of generic waterproofing copy.
Tight East York side yards
When machinery access is limited, we plan hand excavation, wall repair, membrane, drainage board, and careful backfill around neighbouring property lines.
Finished basement seepage
If exterior access is blocked or the basement is already finished, we review interior weeping tile, sump pump placement, and slab restoration before renovation work continues.
Storm backup and window-well leaks
For water entering at windows or drains during heavy rain, we check window-well drainage, backwater valve needs, and whether the City subsidy work applies.
Plan Your Next Step
Related Services
Compare adjacent solutions, confirm coverage, and move to the right next page without having to restart your search.
Compare waterproofing, foundation, drain, concrete, and entrance work from one hub page.
Confirm whether we schedule inspections and project work in your Toronto or Mississauga neighbourhood.
Speak with Saverio directly and get a written quote for your basement or foundation project.
Emergency Basement Flooding?
If you have an active leak, standing water, or suddenly flooding basement, immediate action is required to prevent structural damage and mold growth.
Call us immediately at (416) 879-4593 for urgent assistance.
We Specialize In:
- Exterior Waterproofing
- Interior Waterproofing
- Weeping Tile Systems
- Sump-pits & Sump-pumps
- Backflow Valves
- Window Well Drains
- 20 year transferable warranty on all waterproofing work
Ready to get started?
Call 416-879-4593 or request your free estimate.
Our Waterproofing Process
From initial diagnosis to final cleanup, we follow a rigorous process to ensure your basement stays dry.
Free On-Site Inspection
We inspect the wet area, exterior grade, window wells, drains, sump setup, and foundation wall so the quote is based on the actual source of water.
Quote & Recommendation
We explain why we recommend exterior waterproofing, interior drainage, sump or backwater upgrades, or a combined repair — with a clear written price.
Waterproofing Installation
We complete the approved work, from excavation and membrane installation to weeping tile, sump pumps, backwater valves, and window well drains.
Cleanup & Warranty
We clean the work area, review photos and scope details, and hand over the written 20-year waterproofing warranty for the treated area.
Signs You May Need Waterproofing
Water always finds the path of least resistance. Identifying how moisture is entering your basement is the first step to a permanent solution.
Learn more about Foundation Repair foundation repair so the structural issue is fixed before waterproofing.
Interior Waterproofing
Interior waterproofing is often the practical route for attached Toronto homes, narrow side yards, finished basements, or areas where exterior excavation would damage neighbouring property. It manages water safely under the slab and moves it to a sump system before it reaches finished materials.
Weeping Tile | Sump Pumps | Backflow Valves
Weeping tile, sump pumps, battery backups, and backwater valves are planned together when the floor is opened. Older drainage lines should be checked for blockage or collapse, especially before a basement renovation where future access will be limited.
Window Wells
Exterior Waterproofing
Exterior waterproofing is the best long-term approach when we can reach the wall from outside. We excavate to the footing, repair the foundation, apply membrane and drainage board, install or replace weeping tile, and backfill so water is managed before it reaches the basement wall.
When to choose exterior waterproofing:
Exterior waterproofing gets to the source of the problem and is the best long-term solution for leaky basements. It's ideal when you want complete, permanent protection for your home.
What's Involved:
Interior vs. Exterior: Which Solution Do You Need?
Understanding the differences between exterior vs interior waterproofing helps you make the right choice for your Toronto home. Both methods effectively protect your basement, but each has distinct advantages depending on your situation and budget.
| Factor | Interior | Exterior |
|---|---|---|
| Cost | Lower upfront cost | Higher upfront cost |
| Effectiveness | Manages water after entry | Stops water at the wall |
| Installation | Inside perimeter work | Excavation to the footing |
| Season | Available year-round | Best spring to fall |
| Disruption | Less exterior disruption | More exterior access required |
Not sure which solution is right for your home? Our waterproofing contractors in Toronto will assess your specific situation during a free inspection and recommend the most effective approach for your budget and needs.
Toronto leak patterns
Waterproofing Plans for Toronto's Older Foundations
From tight East York semis and Scarborough bungalows to Mississauga homes with finished basements, we plan access, drainage, window wells, and sump or backwater protection around the exact leak path across Toronto, East York, North York, Forest Hill, Beaches, Leaside, Rosedale, Cabbagetown, Scarborough, and Mississauga.
20-Year Transferable Warranty
Waterproofing warranty coverage follows the treated wall or floor area described in your written scope, so you know exactly what repair is protected and what conditions are excluded before work starts.
By the Numbers
Get Your Free Waterproofing Estimate
Speak with Saverio directly about your project. No obligation, no pressure — just honest advice from someone with 20+ years of experience.