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St. Catharines · updated August 2026

Waterproofing Contractors in St. Catharines: the standings

20 waterproofing contractors serving St. Catharines, ranked by Google rating and review count. The bar shows each one's review volume against the leader. 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.

  1. 1
    Harris Waterproofing
    ★★★★★ 4.9 · 109 reviews · St. Catharines · (289) 273-0166
  2. 2
    Sewer-Man Drain Service St. Catharines
    ★★★★★ 4.8 · 112 reviews · St. Catharines · (365) 364-1212
  3. 3
    Proseal Waterproofing & Contracting Inc.
    ★★★★★ 4.7 · 120 reviews · Niagara Falls · (905) 380-7122
  4. 4
    Aquatech Waterproofing
    ★★★★★ 5 · 76 reviews · St. Catharines · (289) 277-5497
  5. 5
    McMillan Waterproofing Niagara
    ★★★★★ 5 · 63 reviews · Niagara Falls · (905) 714-6789
  6. 6
    Foundation Fix Inc.
    ★★★★★ 4.8 · 65 reviews · St. Catharines · (905) 931-0303
  7. 7
    Basement Waterproofing Niagara Falls
    ★★★★★ 5 · 43 reviews · Niagara Falls · (647) 372-2854
  8. 8
    Complete Casa Construction
    ★★★★★ 5 · 32 reviews · St. Catharines · (289) 929-8988
  9. 9
    Aquatech Waterproofing
    ★★★★★ 5 · 28 reviews · Niagara Falls · (289) 277-9022
  10. 10
    WET AND HUMID NO MORE Ltd.
    ★★★★★ 4.8 · 31 reviews · Niagara Falls · (905) 329-8766
  11. 11
    Okas Contracting
    ★★★★★ 4.7 · 25 reviews · St. Catharines · (905) 984-5397
  12. 12
    Structured Restoration - Niagara
    ★★★★★ 5 · 17 reviews · St. Catharines · (833) 677-5070
  13. 13
    Watertite Roofing St. Catharines
    ★★★★★ 5 · 16 reviews · St. Catharines · (905) 687-6501
  14. 14
    Niagara Waterproofing
    ★★★★★ 5 · 16 reviews · Niagara Falls · (905) 650-7920
  15. 15
    Foundation Expert
    ★★★★★ 5 · 12 reviews · St. Catharines · (289) 438-6369
  16. 16
    All-Pro Waterproofing & Excavating Inc
    ★★★★★ 4.5 · 13 reviews · Niagara Falls · (905) 933-6021
  17. 17
    KC Waterproofing
    ★★★★★ 5 · 5 reviews · Niagara Falls · (289) 990-9929
  18. 18
    Joe Shultz Waterproofing
    ★★★★★ 5 · 4 reviews · St. Catharines · (905) 646-4285
  19. 19
    Classic Waterproofing Unclaimed
    ★★★★★ 5 · 3 reviews · St. Catharines · 063 678 7098
  20. 20
    Emergency Restoration - St Catharines
    ★★★★★ 5 · 1 reviews · St. Catharines · (437) 800-3677
How the standings work. Rank = Google rating × review volume, observed for the St. Catharines area in August 2026. No submissions, no fees, no exceptions — a business moves up by earning reviews, not by paying us. Refreshed monthly.

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