Waterproofing That Lasts for Life

Basement Waterproofing
London Ontario

Permanent waterproofing and foundation repair—fixed right the first time in London & area.

  • Fixed Pricing – what you approve is what you pay
  • Lifetime Transferable Warranty
  • Priority Emergency Response
  • Over 13 Years of Proven Results in London, ON

A1 Waterproofing is built on a simple promise: we fix it once, and we fix it right. From interior and exterior waterproofing to complete foundation repair, our team brings the skill and discipline to stop leaks and restore strength to your home. Backed by proven systems and a no-shortcuts approach, we deliver permanent solutions homeowners can count on.

OUR SERVICES

Proven Solutions for leaky basements

Basement waterproofing is one of the most important repairs and a must-do if you want to guarantee your basement stays waterproof.

 

Waterproofing for Commercial Properties

Commercial waterproofing requires precision and long-term performance. We work with property managers, contractors, and developers to protect buildings from water damage and prevent costly repairs.

Below-Grade Waterproofing
Underslab & Blindside Systems
Fluid & Sheet Membrane Applications
Foundation & Structural Waterproofing
Drainage & Water Management

Proper drainage is critical to preventing water buildup and protecting your property. We provide reliable drainage systems designed to redirect water away from foundations and eliminate moisture issues at the source.

French Drains
Weeping Tile Systems
Yard & Surface Drainage
Downspout Extensions
Swale & Grading Solutions
Drain Repair & Replacement

About us

A1 Waterproofing is Canadian owned family operated company that has been waterproofing homes throughout London  & surrounding for 14 years. At the forefront of our operation is our team of professionals; that share the same commitment to excellence and dedication to providing you, our customer the best value on your investment. 

A1s reputation as a trustworthy and reliable basement waterproofing & foundation repair contractor reflects our dedication to these core values

This isnt just something we do, its something we believe in.

successfully completed projects
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years Serving London & Surrounding
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Every project is documented, inspected, and backed by our lifetime warranty

exterior crack repairs in london ontario

Residential waterproofing services

Exterior Waterproofing for residential waterproofing work in london ontario
  • Stops water before it reaches your basement
  • Permanent solution — not a temporary fix
  • Protects your foundation from long-term damage
  • Eliminates recurring leaks and water issues
interior waterproofing services by A1Waterproofing | Waterproofing & Foundation Repair
  • Lower cost than exterior excavation
  • Fast, low-disruption install
  • Works when exterior access is limited
  • Relieves hydrostatic pressure
  • Protects interior from moisture damage
crack repair service in london Ontario
  • Interior & exterior repair options
  • Polyurethane & epoxy injections
  • Stops active leaks at the source
  • Prevents cracks from spreading
  • Carbon fiber structural reinforcement
Foundation Crack Repair London Ontario

Foundation repair

  • Carbon fiber strapping for wall stabilization
  • Reinforcement of bowed and failing foundation walls
  • Structural crack repair and wall stabilization systems
  • Designed to lock walls in place and stop movement
Sump Pump Install and Repair Services in London Ontario

SUMP PUMPS

  • Interior and exterior sump pump systems
  • Maintenance, inspections, and system upgrades
  • High-performance pump systems (Liberty)
  • Professional pump installation and replacements
  • Battery backup systems for uninterrupted operation
CRAWL SPCE REPAIR & RESTORATION by A1Waterproofing

Crawl space repair

  • Crawl space waterproofing systems
  • Full encapsulation and vapor barrier installs
  • Moisture control and sealed environments
  • Insulation and ventilation upgrades
  • Clean, sealed, and protected crawl space

Why Choose A1 Waterproofing?

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Lifetime Warranty – Your peace of mind matters. Our waterproofing solutions are guaranteed to last—and the warranty stays with your home, even if you sell.
No Upfront Payments – We believe in earning your trust. No deposits or down payments required. Payment is due only when you’re fully satisfied with the work.
Local Experts, Fast Response – We understand the soil conditions, drainage patterns, and foundation issues common in the London area. When water problems need urgent attention, we move quickly with proven solutions.
No Subcontractors – Your project is handled by our own trained crew from start to finish. By keeping the work in-house, we maintain better quality control, clearer communication, and consistent results.

Check out our work!

Our team is doing great

DRAINAGE ISSUES?

Pooling water

Control Water before it becomes a problem

French Drain Systems – Subsurface drainage designed to capture and redirect groundwater before it causes issues around your property.
Weeping Tile Systems – Foundation-level drainage that relieves water buildup and reduces pressure around your home.
Yard & Surface Drainage – Solutions that eliminate standing water and improve drainage across lawns, driveways, and low areas.
Sewer Drain Repair – Diagnosing and repairing damaged or blocked sewer lines to restore proper drainage and prevent backups.
How much can you expect to pay for exterior waterproofing, interior waterproofing?

How much can you expect to pay???

When quoting an exterior waterproofing repair there are many factors to consider when pricing takes place.

Things such as proximity to other homes or obstacles, underground services such as gas or hydro & soil type to mention a few.

On average a homeowner should expect to pay between $75 – $125 a linear foot for exterior waterproofing.

Interior waterproofing is cheaper and sometimes less evasive but unlike exterior waterproofing, which prevents water from coming in contact with the foundation it acts as a corrective method that manages water that has already entered a basement.

Cost typically range between $60 and $100 per linear foot. 

When we repair foundation cracks, we don’t mess around, upholding a rigorous standard of quality in our crack repair services. Whether performed by hand on the exterior of the home or done from the inside, we guarantee results or your repair cost is fully refunded.

Interior Vertical Crack Repairs range from $600 – $800

Exterior Vertical Crack Repairs range from: Contact us for options & pricing.

The size and type of drain, where it will be install as well as the obstacles that may be encountered determine the cost.
You can expect to pay from $50 – $100 linear foot.

Recent Acheivments

8 Mile Rd. Project

Carbon Fiber Repair (Steelway)

Boca Dental

Capital Theater

West London

WE Value your business!

Quotes within 48hrs

At A1 we understand that water can wreak havoc in a short amount of time and thats why if your issue is urgent we work extra hard to provide solutions within 48hrs

Dont Pay Until Your satisfied

A1 is so dedicated to providing their customers with the very best service we won’t ask for any form of payment until your satisfied with the work completed

No payment upfront

We are so confident with our quality of workmanship that we wont ask you for payment until your satisfied with the work completed.

quotes within 48hrs

At A1 we understand that water can wreak havoc in a short amount of time and thats why if your issue is urgent we work extra hard to provide solutions within 48hrs.

Don't pay until your satisfied

A1 is so dedicated to providing their customers with the very best service we won’t ask for any form of payment until your satisfied with the work completed

Your Satisfaction, Our Priority

You can rest assured that we are so confident with our quality of workmanship that we wont ask you for payment until your satisfied with the work completed.

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