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About us

Keeping your basement dry for life - guaranteed

At A1 Waterproofing, we’re proud to be London, Ontario’s trusted experts for basement waterproofing, drainage solutions, and foundation repair. Whether you’re dealing with a wet basement, foundation cracks, or poor drainage around your home, we’re here to protect your property—properly and permanently. We believe waterproofing should be done right the first time. That’s why we back our work with a Lifetime Transferable Warranty and never ask for a down payment. You don’t pay until the job is done right

why choose us

Our confidence in our capabilities is reflected in our payment policy; we do not accept payment until the job is completed to your satisfaction. By entrusting your waterproofing needs to us, you can be assured of receiving top-quality service that surpasses our competitors.

Areas We Service:

London St. Thomas Strathroy Aylmer Dorchester Tillsonburg Komoka If your a bit outside of our service area please give us a call and we can see if we can still be assistance

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