How Our Basement Underpinning Installation Process Works in Toronto

According to the experienced basement underpinning contractors at Canada Waterproofers — with over 25 years in the industry — here’s how the process typically works. The team has successfully strengthened and transformed hundreds of basements across the GTA, ensuring safety, precision, and long-term results.

• Work areas are protected with tarps, and all equipment and ductwork are moved out of the way before construction begins.
• Temporary supports are installed to stabilize the home while the foundation work is being carried out.
• Technicians excavate and reinforce the foundation in sections according to the approved drawings and permits. Soil strength is carefully assessed to confirm it can support the structure. If the soil is too weak, it’s replaced with concrete section by section — all performed in consultation with licensed structural engineers.
• Excavated soil is removed and disposed of to achieve the desired basement depth.
• A new plumbing and interior waterproofing system is installed, including a sump pit to keep the area dry. Backup sump pumps — battery-powered or water-powered — are added to protect against power outages.
• An exterior waterproofing membrane and weeping tile are connected to the sump pit below floor level. This setup captures groundwater and safely channels it away from the foundation.
• The weeping tile is encased with gravel, and four inches of clear gravel are spread evenly throughout the lowered basement floor.
• High-strength 25 MPA concrete is poured and finished with a trowel or helicopter finish, providing solid structural integrity and a smooth surface.
• Concrete is allowed to cure properly to achieve its full strength before the temporary supports are removed.
• Finally, the crew cleans up the work area and removes all debris from the site.

Every project completed by Canada Waterproofers comes with unmatched craftsmanship and reliability. The company proudly offers a 15-year warranty on all basement foundation projects, giving homeowners confidence in both quality and durability.

Thinking About Basement Underpinning in Toronto? Trust Licensed Experts

House prices in Toronto and the surrounding areas keep rising. As prices rise, usable space becomes premium. Underpinning is an excellent way of making that unusable basement into something that can become part of your home. Underpinning means reinforcing an existing foundation or digging out the foundation to add ceiling height.

Underpinning/ basement lowering your home and finishing that unused space will add a huge amount of value to the property. With house prices at a record high, it is much cheaper to underpin your home than it is to buy somewhere else.

Canada Waterproofers can underpin your home at an affordable price and do it safely, as we have all the skills and training needed.

If you are considering having your basement underpinned, then it is very important to ask all the right questions, as underpinning can be dangerous if it is performed incorrectly. Ask your contractor these questions:

• Are you licensed?
• Do you have all the correct insurances?
• Do you need drawings and permits?
• Do you need the city to inspect your work?
• Do you have references?

If your contractor answers YES to all of these questions, then you are probably safe, but be sure to check all their credentials out before any work is started.

Main Stages of Basement Underpinning for Toronto Homes