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St. Catharines · updated October 2026

Basement Waterproofing Companies in St. Catharines: the standings

12 basement waterproofing companies serving St. Catharines, ranked by Google rating and review count. The bar shows each one's review volume against the leader. Arrows show movement since Sep 6. Nobody can pay to move up.

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One labelled spot above these standings, reserved for a claimed St. Catharines business. It never changes the ranking below. Claim your listing to take it.

Who leads basement waterproofing companies in St. Catharines right now

  1. 1

    Proseal Waterproofing & Contracting Inc.

    ★★★★★ 4.8 · 125 reviews · Niagara Falls · (905) 380-7122
    ▲2 +3 reviews since Sep 6
  2. 2

    Aquatech Waterproofing

    ★★★★★ 5 · 76 reviews · St. Catharines · (289) 277-5497
    ▲2 0 reviews since Sep 6
  3. 3

    McMillan Waterproofing Niagara

    ★★★★★ 5 · 64 reviews · Niagara Falls · (905) 714-6789
    ▲2 0 reviews since Sep 6
  4. 4

    Foundation Fix Inc.

    ★★★★★ 4.8 · 75 reviews · St. Catharines · (905) 931-0303
    ▲2 +3 reviews since Sep 6
  5. 5

    Basement Waterproofing Niagara Falls

    ★★★★★ 5 · 43 reviews · Niagara Falls · (647) 372-2854
    ▲2 0 reviews since Sep 6
  6. 6

    Basement Waterproofing St. Catharines

    ★★★★★ 5 · 28 reviews · St. Catharines · (289) 906-3714
    ▲2 0 reviews since Sep 6
  7. 7

    Structured Restoration - Niagara

    ★★★★★ 5 · 20 reviews · St. Catharines · (833) 677-5070
    new 0 reviews since Sep 6
  8. 8

    Foundation Expert

    ★★★★★ 5 · 12 reviews · St. Catharines · (289) 438-6369
    ▲2 0 reviews since Sep 6
  9. 9

    Seal-Tite Quality Concrete

    ★★★★★ 5 · 12 reviews · St. Catharines · (905) 937-3338
    ▲2 0 reviews since Sep 6
  10. 10

    All-Pro Waterproofing & Excavating Inc

    ★★★★★ 4.5 · 13 reviews · Niagara Falls · (905) 933-6021
    ▲2 0 reviews since Sep 6
  11. 11

    Joe Shultz Waterproofing

    ★★★★★ 5 · 4 reviews · St. Catharines · (905) 646-4285
    ▲2 0 reviews since Sep 6
  12. 12

    Classic Waterproofing Unclaimed

    ★★★★★ 5 · 3 reviews · St. Catharines · 063 678 7098
    ▲2 0 reviews since Sep 6
How the standings work. Rank = Google rating × review volume, observed for the St. Catharines area in October 2026. No submissions, no fees, no exceptions — a business moves up by earning reviews, not by paying us. Refreshed monthly. 11 of 12 changed rank since Sep 6. See this month's movers.

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1 of these 12 listings are still unclaimed — customers notice. Claiming is free: your description, services, and correct hours on your profile. The rank stays earned either way.

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