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St. Catharines · updated October 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. Arrows show movement since Sep 6. Nobody can pay to move up.

Featured slot — open

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 waterproofing contractors in St. Catharines right now

  1. 1

    ServiceMaster Restore of Niagara

    ★★★★★ 4.9 · 327 reviews · St. Catharines · (289) 273-5160
    new 0 reviews since Sep 6
  2. 2

    Proseal Waterproofing & Contracting Inc.

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

    Harris Waterproofing

    ★★★★★ 4.9 · 112 reviews · St. Catharines · (289) 273-0166
    new 0 reviews since Sep 6
  4. 4

    Aquatech Waterproofing

    ★★★★★ 5 · 76 reviews · St. Catharines · (289) 277-5497
    ▼1 0 reviews since Sep 6
  5. 5

    McMillan Waterproofing Niagara

    ★★★★★ 5 · 64 reviews · Niagara Falls · (905) 714-6789
    ▼1 0 reviews since Sep 6
  6. 6

    Foundation Fix Inc.

    ★★★★★ 4.8 · 75 reviews · St. Catharines · (905) 931-0303
    new 0 reviews since Sep 6
  7. 7

    Basement Waterproofing Niagara Falls

    ★★★★★ 5 · 43 reviews · Niagara Falls · (647) 372-2854
    ▼2 0 reviews since Sep 6
  8. 8

    Complete Casa Construction

    ★★★★★ 5 · 32 reviews · St. Catharines · (289) 929-8988
    ▼2 0 reviews since Sep 6
  9. 9

    Basement Waterproofing St. Catharines

    ★★★★★ 5 · 28 reviews · St. Catharines · (289) 906-3714
    ▼2 0 reviews since Sep 6
  10. 10

    911 Restoration Niagara

    ★★★★★ 5 · 22 reviews · St. Catharines · (289) 271-0090
    — 0 reviews since Sep 6
  11. 11

    Okas Contracting

    ★★★★★ 4.7 · 25 reviews · St. Catharines · (905) 984-5397
    — 0 reviews since Sep 6
  12. 12

    Structured Restoration - Niagara

    ★★★★★ 5 · 20 reviews · St. Catharines · (833) 677-5070
    — +2 reviews since Sep 6
  13. 13

    Watertite Roofing St. Catharines

    ★★★★★ 5 · 20 reviews · St. Catharines · (905) 687-6501
    ▼4 0 reviews since Sep 6
  14. 14

    Seal-Tite Quality Concrete

    ★★★★★ 5 · 12 reviews · St. Catharines · (905) 937-3338
    ▲1 0 reviews since Sep 6
  15. 15

    IV & AV Premium Construction Ltd

    ★★★★★ 5 · 12 reviews · St. Catharines · (905) 324-8515
    new 0 reviews since Sep 6
  16. 16

    All-Pro Waterproofing & Excavating Inc

    ★★★★★ 4.5 · 13 reviews · Niagara Falls · (905) 933-6021
    — 0 reviews since Sep 6
  17. 17

    KC Waterproofing

    ★★★★★ 5 · 7 reviews · Niagara Falls · (289) 990-9929
    — +2 reviews since Sep 6
  18. 18

    Joe Shultz Waterproofing

    ★★★★★ 5 · 4 reviews · St. Catharines · (905) 646-4285
    — 0 reviews since Sep 6
  19. 19

    Classic Waterproofing Unclaimed

    ★★★★★ 5 · 3 reviews · St. Catharines · 063 678 7098
    — 0 reviews since Sep 6
  20. 20

    Emergency Restoration - St Catharines

    ★★★★★ 5 · 1 reviews · St. Catharines · (437) 800-3677
    — 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. 7 of 20 changed rank since Sep 6. See this month's movers.

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1 of these 20 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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