External, Exterior & Outside Basement Waterproofing

External waterproofing (also called exterior waterproofing or outside basement waterproofing) is a long-term service that stops basement leaks by protecting the foundation from the outside. Dryshield provides external basement waterproofing in Toronto and the GTA by accessing the foundation down to the footing, completing foundation crack repair where needed, and restoring weeping tile drainage so water is directed away from the foundation.

For a full overview of systems and options, see our basement waterproofing page.

At a glance
• Best for: recurring basement leaks through the foundation wall
• Service: external waterproofing / outside basement waterproofing
• Includes: foundation crack repair (when needed) + weeping tile drainage restoration
• Typical cost: $100 to $250 per linear foot (site conditions affect pricing)
• Warranty: Lifetime transferable warranty available

Our exclusive 7-layer system offers redundant protection to ensure your foundation stays dry.

1. Structural Repair: We excavate to the footing and clean all cracks.

2. Hydraulic Cement: Cracks are fused shut with expanding hydraulic cement.

3. Rubberized Membrane: A seamless, flexible bituminous coating covers the wall.

4. 10-Mil Poly Reinforcement: Exclusive to DryShield. We embed heavy-duty 10-mil polyethylene sheeting into the membrane for superior tear resistance.

5. Dimple Board: High-density drainage board with a top finishing strip creates an air gap to relieve hydrostatic pressure.

6. Drainage Layer: We replace backfill with 3/4″ Clear Stone to maximize water flow to the weeping tile.

7. Filtration: Geo textile filter cloth prevents soil from clogging the system.

External waterproofing is a proactive and permanent solution for protecting your basement. This method involves excavating the soil around your foundation to create a physical barrier between your home and the surrounding groundwater. Whether you’re dealing with existing leaks or want to prevent future issues, our services are built on proven methods and high-grade materials that keep your foundation dry and secure.

Toronto homeowners turn to us because of our commitment to quality, transparency, and long-term performance. With Decades in the industry, we’ve built a reputation for excellence in protecting basements from leaks.

Here’s why we’re a top choice:

• Certified Professionals: Our team is trained and certified in advanced waterproofing techniques. We stay up to date with industry innovations to ensure every job is done right the first time.
  

• Proven Track Record: We’ve helped thousands of homeowners across the GTA secure their basements with reliable external waterproofing systems.
  

• Tailored Solutions: Every home is unique. We evaluate each property individually to create a waterproofing plan that addresses specific risks based on soil conditions, age of the structure, and past damage.
  

• Service-First Approach: We focus on professional exterior waterproofing work and drainage restoration—not product sales—so the plan is built around stopping basement leaks long-term.

• Comprehensive Inspection and Warranty: Before starting any project, we thoroughly inspect the area to determine the root cause of the moisture problem. Our work is backed by a 25-year transferable warranty, offering homeowners long-term peace of mind.
  
  

When it comes to outside basement waterproofing, we ensure the job is done efficiently and thoroughly, providing long-term protection that keeps your home dry and strong for years to come.

External basement waterproofing cost in Toronto depends on the scope of outside waterproofing required and the site conditions, including the length of foundation wall, how deep the foundation is, access around the home, and whether weeping tile drainage needs repair or replacement. On average, exterior basement waterproofing typically ranges from $100 to $250 per linear foot.
For an accurate price, we provide a free on-site assessment and a clear estimate based on what your foundation needs.

Choosing exterior basement waterproofing with Dryshield offers long-term protection and peace of mind. By addressing water intrusion at its source, you prevent costly repairs and leaks issues before they begin.

Here are some of the major benefits:

• Permanent Moisture Protection: Unlike interior solutions, exterior waterproofing stops water before it reaches your basement walls, keeping your space completely dry.

• Preserves Foundation Integrity: Helps prevent ongoing water exposure that can contribute to foundation cracks and basement leaks.

• Helps Keep Basements Dry: Reduces recurring basement leaks and moisture issues by stopping water outside the foundation.

• Increases Property Value: Homes with professionally waterproofed basements are more attractive to buyers and maintain higher resale value.
  

• Reduces Long-Term Repair Costs: By eliminating water issues early, you avoid costly repairs to walls, floors, and belongings in the future.

• Customized Protection for Toronto Conditions: Our system is built to handle the region’s freeze-thaw cycles, heavy rainfall, and clay-rich soils.

Investing in external basement waterproofing now ensures that your home will remain safe, dry, and strong for years.

Our proven approach to external waterproofing Toronto focuses on eliminating water penetration at the source. At Dryshield, we follow a comprehensive 11-step method to ensure your basement stays dry and secure:

1. Site preparation and protection: We prepare the work area to reduce disruption and keep the site safe.

2. Access the foundation from the outside: We expose the foundation wall down to the footing where outside waterproofing is needed.

3. Foundation wall cleaning: We clean the exposed foundation so repairs and outside waterproofing work can be completed properly.

4. Foundation inspection: We identify outside entry points and areas contributing to basement leaks.

5. Foundation crack repair: We repair foundation cracks and weak points that allow water entry.

6. External waterproofing application: We complete the outside waterproofing work designed to block water from reaching the foundation wall.

7. Exterior drainage protection: We add exterior drainage protection so water is directed down toward the footing drainage.

8. Weeping tile installation or replacement: We install or replace weeping tile at the footing where needed to restore drainage away from the foundation.

9. Drainage gravel placement: We place drainage gravel around the weeping tile to support water flow.

10. Backfill and grading: We restore the area and ensure grading helps direct water away from the foundation.

11. Final clean-up: We leave the site clean and the work area restored.

Each step in our method is designed to reduce hydrostatic pressure and permanently redirect water away from your home. When you choose Dryshield, you receive a complete and effective solution tailored to Toronto’s unique environmental conditions.

Exterior Waterproofing Toronto doesn’t just fix current problems; it proactively protects your property against future issues. Get it done right with Dryshield. Contact us today to schedule your free estimate and discover how our team can help you.

FAQ

How to waterproof the exterior of your basement?
Exterior basement waterproofing (outside basement waterproofing) is completed by accessing the foundation from the outside down to the footing, repairing foundation cracks or weak points, completing external waterproofing work on the foundation wall, and restoring weeping tile drainage so water is directed away from the home.

How much does it cost to waterproof the exterior of a basement?
Exterior waterproofing cost depends on wall length, foundation depth, access, and whether weeping tile drainage requires repair or replacement. In Toronto, exterior basement waterproofing commonly ranges from $100 to $250 per linear foot, and total pricing can vary based on the scope of work.

Is it better to waterproof a basement from inside or outside?
Outside basement waterproofing is often the best option when water is entering through the foundation wall from the exterior side. The right choice depends on where the water is entering, which is why an inspection is recommended.

What is the best waterproofing method for basements?
The best basement waterproofing method depends on the source of the leak. External waterproofing and outside basement waterproofing are designed to stop water at the foundation wall from the outside. For other leak sources, Dryshield can recommend the correct basement waterproofing service after an inspection.

How long does exterior basement waterproofing last?
When external waterproofing and weeping tile drainage are completed correctly, exterior basement waterproofing is designed to be a long-term solution that helps prevent recurring basement leaks.

Why doesn’t exterior basement waterproofing work sometimes?
Outside basement waterproofing can fail when the exterior work is not completed correctly or when weeping tile drainage is clogged or not directing water away from the foundation. Proper installation and proper drainage are key to long-term performance.

Reviewed by: Jonathan McMahon Senior Waterproofing Technician, Dryshield
Experience: 25+ years external waterproofing and outside basement waterproofing in Toronto and the GTA
Last updated: December 2025