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St. Catharines · updated August 2026

Basement Waterproofing Companies in St. Catharines: the standings

18 basement waterproofing companies 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
    All Dry Waterproofing Ltd.
    ★★★★★ 5 · 134 reviews · Niagara Falls · (905) 401-9041
  2. 2
    Harris Waterproofing
    ★★★★★ 4.9 · 109 reviews · St. Catharines · (289) 273-0166
  3. 3
    Sewer-Man Drain Service St. Catharines
    ★★★★★ 4.8 · 112 reviews · St. Catharines · (365) 364-1212
  4. 4
    Proseal Waterproofing & Contracting Inc.
    ★★★★★ 4.7 · 120 reviews · Niagara Falls · (905) 380-7122
  5. 5
    Aquatech Waterproofing
    ★★★★★ 5 · 76 reviews · St. Catharines · (289) 277-5497
  6. 6
    McMillan Waterproofing Niagara
    ★★★★★ 5 · 63 reviews · Niagara Falls · (905) 714-6789
  7. 7
    Foundation Fix Inc.
    ★★★★★ 4.8 · 65 reviews · St. Catharines · (905) 931-0303
  8. 8
    Foundation Waterproofing by Moe
    ★★★★★ 4.8 · 56 reviews · Niagara Falls · (905) 892-2953
  9. 9
    Basement Waterproofing Niagara Falls
    ★★★★★ 5 · 43 reviews · Niagara Falls · (647) 372-2854
  10. 10
    Complete Casa Construction
    ★★★★★ 5 · 32 reviews · St. Catharines · (289) 929-8988
  11. 11
    WET AND HUMID NO MORE Ltd.
    ★★★★★ 4.8 · 31 reviews · Niagara Falls · (905) 329-8766
  12. 12
    Structured Restoration - Niagara
    ★★★★★ 5 · 17 reviews · St. Catharines · (833) 677-5070
  13. 13
    Foundation Expert
    ★★★★★ 5 · 12 reviews · St. Catharines · (289) 438-6369
  14. 14
    Seal-Tite Quality Concrete
    ★★★★★ 5 · 12 reviews · St. Catharines · (905) 937-3338
  15. 15
    All-Pro Waterproofing & Excavating Inc
    ★★★★★ 4.5 · 13 reviews · Niagara Falls · (905) 933-6021
  16. 16
    Joe Shultz Waterproofing
    ★★★★★ 5 · 4 reviews · St. Catharines · (905) 646-4285
  17. 17
    Classic Waterproofing Unclaimed
    ★★★★★ 5 · 3 reviews · St. Catharines · 063 678 7098
  18. 18
    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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