Waterproofing is a specialized trade that protects a property's foundation, basement and
structure from water damage. The companies below serve Toronto and the GTA, offering interior
and exterior waterproofing, crack repair, drainage and underpinning.
How we rank: The numbers shown are our own Editorial Rating,
not a Google, HomeStars or BBB score. Positions #1–#3 reflect project direction; the remaining
order is editorial, not an independently proven industry league table. Where a live platform
rating or review count appears, the platform is named and should be re-checked before relying on it.