Waterproofing for the future
Interior Waterproofing
Interior Basement Waterproofing in London, Ontario
Damp, musty basement?
Nobody wants a damp, musty basement. With our interior waterproofing solutions, you can finally say goodbye to leaks and enjoy a dry, usable space. A1 Waterproofing helps homeowners across London stop water at the source—whether it’s through drainage systems, crack repairs, or a new sump pump. Backed by our 25-year warranty, you’ll get results you can trust for decades.
Benefits of Interior Basement Waterproofing
- Stops Leaks Fast – Repairs water seepage from the inside without major excavation.
- Protects Finished Basements – Keeps drywall, flooring, and furniture safe from moisture damage.
- Cost-Effective – Interior waterproofing is often less expensive than exterior foundation work.
- 25-Year Warranty – Long-term protection backed by A1 Waterproofing’s guarantee.
- London, Ontario Experts – Local team with over 14 years of experience serving homeowners in the area.
Why Interior Waterproofing Matters in London, Ontario
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.
Our Interior Waterproofing Process
✅ Sub-floor drainage systems (Weeping Tile) — redirects water silently to a sump. Benefit: 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 – Repair your foundation using our Carbon Fiber wall stabilization system, made to strengthen and reinforce bowed walls
why choose us?
Proven. Trusted. Preferred.
💧 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
Your investment is protected! We’re fully licensed, insured, and committed to excellence, giving you confidence that your home is in the right hands
Serving London, Ontario and Surrounding Areas
We proudly serve homeowners across London, Ontario and nearby towns including St. Thomas, Dorchester, Komoka, Strathroy, and more.
our team is doing great
CHECK OUT SOME OF OUR RECENT PROJECTS!
tHERE ARE TWO PRIMARY TYPES OF BASEMENT LEAKS
Hydrostatic pressure
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.
Foundation leaks
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.
Quotes within 48 Hours
“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
Get a Free Interior Waterproofing Estimate
Common Questions (FAQs)
Common Questions (FAQs)
Is interior waterproofing a viable solution? 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 2–5 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
our team is doing great work!!!
Book a free estimate
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.
