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Our Story

Crownseal Inc. is a family owned and operated business, successfully serving clients in Southern Ontario for over 25 years. 100% of operation is foundation waterproofing & repairs. We are specialists and offer several different solutions to meet your needs. We employ TOP OF THE LINE PRODUCTS, and will give you the best case solution…every time!

Offering both interior and exterior waterproofing options, our customer base is extensive and consists of residential, contractors, real estate, insurance, home inspectors, property management, government shelters & youth centers, home service clubs.

All work is backed by a 25 year warranty on
exterior and interior.

our mission


Crownseal Mission Statement

Our company mission is “to implement effective, permanent solutions which meet the needs and requirements of our customers, by supplying the most advanced materials and products available. The Crownseal Inc. approach to each project is centered on developing a strong client relationship while providing state of the art technical solutions. Our commitment is attention to detail, large or small. We want to make you, the customer, totally satisfied through the whole construction process, from the initial consultation to the final inspection. Protect the investment you have made in your property.

Frequently Asked


Why do basements leak?

According to the Home Inspection Census, 98% of all basements will eventually leak.

Leaking basements are a big problem. When water gets into a basement it can affect your whole house. Understanding why basements leak is the first step in preventing leaking in your basement. It can cause foundation damage and even introduce harmful mold.
If you spot mold, chalky white powder, or brown stains on your concrete walls this may be an indication you have a problem. Some of the problems are due to the following:

Cracks or Holes in the Walls or Foundation
One of the most common is simply water running into the basement through the wall joints, seeping through the floor and coming in through cracks. Problems like this can be solved by a variety of waterproofing techniques.

Plugged Weeping Tiles
Sometimes basements leak because the drainage system around the house is clogged and that causes water to back up and flow into the basement. This can be solved by replacing an old weeping tile system.

Leaky Windows or Blocked Drainage Tiles in Window Wells
Another common leak is through basement windows. When there is a lot of rain or snow drainage, windows can leak since they are at ground level. Installing new window wells (with proper drainage), can help to solve this problem.

Hydrostatic Pressure
Ground water moves upward when the soil becomes saturated during heavy rains; pushes up from under the floor and makes its way in at the footer joint. The solution! Install an interior Pressure Relief System – connected to a sump system.

Basements by nature are generally damp. Most basements require the use of a dehumidifier to rid excess moisture form the air. Moisture can be just as damaging as a leak if left untreated. Basements will leak because it is just natural. Basements are located below ground and if they are not properly waterproofed, then leaking will occur. They are more susceptible to water leaking because they are closer to water sources and at the perfect level for drainage issues. By understanding the common causes of basement leaks you can help to prevent leaks in your basement. Crownseal is here to help!

What cities are serviced by Crownseal?

We proudly serve these areas:

  • Oakville
  • Burlington
  • Mississauga
  • Brampton
  • Hamilton
  • West Toronto
  • Vaughn
  • Georgetown
  • Milton
  • Etobicoke
  • Thornhill
Are your services guranteed?

YES! A waterproof basement and peace of mind are the most important benefits of working with Crownseal Inc. We Guarantee Your Satisfaction and Our Workmanship, and are committed to going above and beyond in service to our customers.

All Crownseal services come with a 25 year transferable warranty.

25 Year transferable warranty:

  • Outside Excavation and Waterproofing
  • Brick and Block Repair
  • Polyurethane Crack Injection
  • Inside Drain Tile with Delta Membrane
  • Sump Pump Installation
  • Rod Hole Repair
  • Pipe and Conduit Repair
  • Weeping Tile Installation and Replacement
  • Window Well Installation
  • Custom Downspout Extensions

Look no further for professional waterproofing.