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WAterproofing for the future
Interior waterproofing is a powerful, affordable solution to manage basement water without the disruption of digging outside. It protects your home, improves air quality, and allows you to finish your basement — all while keeping costs lower than full exterior systems.
✅ Sub-floor drainage systems (Weeping Tile) — redirects water silently & alleviates hydro static pressure
✅ Sump pump installation with optional battery backup — professional installation of primary and backup sump pumps
✅ Wall sealants & waterproofing membranes — block moisture and prevent mold
✅ Foundation crack repairs (epoxy/polyurethane injection) — 3 part waterproofing system guaranteed for 25 years
✅ Carbon Fiber Strapping – Carbon Fiber wall stabilization, reinforce bowed walls
💧 No Upfront Payment Required
We don’t ask for a deposit — pay only when the job is complete and you’re satisfied.
⏱️ Fast, Reliable Response
Urgent issues? We offer same-day or next-day service across London and surrounding areas.
🧾 Quotes Within 48 Hours
You’ll receive a detailed, transparent estimate within 48 hours of your request — no hidden fees, no pressure.
🛡️ 25-Year Transferable Warranty
Every waterproofing job comes backed by a 25-year warranty — and it stays with the home, even if you sell.
🛠️ Licensed & Insured Professionals
Our experienced, certified team treats your home with the care and respect it deserves.
You can rest assured that we are so confident with our quality of workmanship that we wont ask you for any form of payment until your satisfied with the work completed.
“Have an urgent leak or flooding concern? A1 Waterproofing offers fast, no-obligation quotes within 48 hours—so you get answers, pricing, and peace of mind without the wait
All crack repairs are backed by a lifetime warranty. This warranty ensures that our clients have peace of mind, knowing that we are committed to delivering long-lasting solutions.
Residential waterproofing is our specialty, and we pride ourselves on being experts in this field. We understand the importance of keeping your home safe from water damage, and we take this responsibility seriously.
Residential waterproofing is our specialty, and we pride ourselves on being experts in this field.
We strive to exceed your expectations by offering the most advanced and reliable services tailored to ensure long lasting results
The first type emerges from beneath the basement floor, where water pressure builds up and forces moisture through cracks or gaps called hydro-static pressure.
The second common type occurs when water seeps through the foundation walls, possibly due to foundation cracks, poor drainage or inadequate waterproofing around the house. Recognizing the specific type of leak is crucial, as it determines the appropriate method for effective treatment and prevention.
Interior waterproofing is a superior choice when exterior work may be to difficult or costly.
Not only is it typically about 40% – 50% more cost-effective, but it also avoids the complications associated with excavating along foundation walls & heavy equipment used around your home.
By choosing interior solutions, you can preserve stuff like your deck, walkways, and fencing, all while achieving a reliable and fully waterproofed repair.
Interior waterproofing typically ranges from $65–$150/linear foot in London. We guarantee no hidden fees, with detailed pricing in your estimate.
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Common Questions (FAQs)
Yes — interior waterproofing is a highly effective solution, especially when exterior excavation isn’t possible or preferred. It controls water from the inside, protecting your basement from leaks, with minimal disruption to your property.
How long does it take?
Most homes are completed within 2–4 days, depending on size and scope.
Will it prevent mold?
Absolutely—drainage, sump pumps, and coatings keep moisture out of living areas, eliminating mold. Changes in air quality are near instant
The excavation space surrounding your property’s foundation is an important factor when considering exterior vs Interior waterproofing installation. In some cases adequate excavation space is insufficient or there’s a structure or deck that would require removal, then the recommended alternative is to opt for an interior waterproofing system.
For interior waterproofing, a weeping tile is installed and waterproofing membrane is fasten to the walls on the inside of home. This system intercepts water where it collects in the weeping tile & discharges into sump basin. Sump pump expellees water that is collected to the outside of home.
Regardless of how minor or severe it may seem we are always happy to serve and offer any guidance if you plan on tackling a waterproofing project yourself. Call us today @ (519)495-6060 for more information or book an estimate online by clicking the link below.
Water in your basement and foundation leaks can only get worse over time, so its important to have the problem taken care of immediately and we highly recommend a professional waterproofing service. That being said, It’s recommended to waterproof from the outside of the home as this eliminates water from ever coming into direct contact with your foundation but situations won’t always allow for that option. Waterproofing from the interior is a reliable and long term solutions
There are a few factors to consider when choosing which waterproofing repair works best for you.
Waterproofing from the interior eliminates the need for heavy equipment and can be done any time of year during any type of weather and once were finished(with the exception of the wall membrane) it will be hard to tell we were even there. When waterproofing from the exterior you will have a large trench around most of your home and anything within that area has to be removed from the excavation area. This includes decks, patios, section of driveways, sheds, fences etc.
Cost – Interior waterproofing is typically cheaper as the scope of work is less then waterproofing from the exterior. Every home requires a unique waterproofing system, some easier than other ones. Contractors like A1 Waterproofing that specialize in waterproofing will have the answers to your questions and a plan that works for your home and budget.
Difficult/dangerous Excavation – It is not uncommon to have underground gas, hydro, telecom and other buried services run along your home. It is still possible but it would require more time and resources to hand dig the portion with hidden underground services. No machine digging within 1 meter of underground services and that effects the overall cost of the project.
We want to do everything that we can to ensure the safety and protection of our home. Thats why its important to hire the right contractor that can verse you on the proper solutions that meet your unique waterproofing issue.
