What is exterior waterproofing?

Exterior waterproofing involves excavating around the foundation, applying a waterproof membrane, and installing drainage systems so water never enters your basement.

How long does an exterior waterproofing project take?

Most projects in London, Ontario take 2–5 days depending on home size, soil conditions, and site access.

Does exterior waterproofing damage landscaping?

Some landscaping may need to be removed during excavation, but we carefully restore and backfill after the waterproofing is complete.

What warranty do you provide?

A1 Waterproofing offers a 25-year transferable warranty on all exterior waterproofing work.

How do I know if I need exterior or interior waterproofing?

Exterior waterproofing is the most permanent solution. In some cases, interior waterproofing can be used as a complement. We provide free inspections to recommend the best option.