Researched rankings in 38 cities across the United States and Canada, each with a last-reviewed date.

TenBestFindThe best, verified
Add Your Business

Waterproofing · Calgary, ABLast reviewed October 2026

5 Best Waterproofing Companies in Calgary, AB (2026)

TenBestFind ranks 5 waterproofing contractors in Calgary, AB. To be included a company needed 4.5 stars or better from at least 50 Google reviews, an operating status, a working website, a staffed street address and a real logo. The list was last reviewed on October 20, 2026.

Five Calgary waterproofing and foundation companies made this list: Groundworks Foundation Repair Calgary, Southern Roofing and Waterproofing, Wizard Crack Repair, Calgary Parging and Building Works Ltd. They follow Google's order, each holds 4.7 stars or better from 50 or more Google reviews as read on October 20, 2026, and each profile says plainly where its work is narrower than a full basement drainage contractor.

5 companies reviewed5 rankedHow We Rank

The Ranking

Our top 5 waterproofing contractors in Calgary

Calgary clay swells when it is wet and shrinks when it dries, and winter frost heave keeps adding pressure on foundation walls. Most basement water here comes through cracks, at the floor and wall joint, or through window wells and exterior surfaces. This list covers five companies that handle some part of that problem: interior drainage and sump pumps, crack injection, exterior parging, building envelope waterproofing, and exterior membranes. Calgary is a smaller waterproofing market than its size suggests, because many local specialists are foundation repair, parging or restoration firms rather than full basement drainage contractors. Two entries are closest-to-qualified picks and say so openly: Southern Roofing and Waterproofing is a roofer first, and Building Works Ltd is a building envelope firm. Read each profile to match the company to your problem.

Showing 5 of 5
  1. 01

    Best for leaking basements, cracked walls and failing sump pumps

    Groundworks Foundation Repair Calgary

    4.8(895 Google reviews)
    Best forCalgary homeowners with leaking basements, cracked walls or failing sump pumps
    In businessNot listed
    WarrantyWarranty-backed waterproofing systems, described on the company site as nationally backed. Length and transfer terms are not published, so ask for them in writing.
    EmergencyNot listed

    Why we picked them

    4.8 from 890 Google reviews, with a Calgary branch offering waterproofing, sump pumps, foundation repair and radon work.

    What we like

    • Interior drainage, sump pumps and vapor barriers from one crew
    • Reviewers name crews and praise tidy work areas
    • Open 5 am to 9 pm on weekdays

    Things to consider

    • Warranty length and transferability are not published on its website.
    Key details
    Best for
    Calgary homeowners with leaking basements, cracked walls or failing sump pumps
    Service area
    Calgary
    Address
    5555 80 Ave SE
    Warranty
    Warranty-backed waterproofing systems, described on the company site as nationally backed. Length and transfer terms are not published, so ask for them in writing.
    Financing
    Available
    Credentials
    Better Business Bureau badge shown on company site
  2. 02

    Best for roofing and exterior foundation membrane work from one contractor

    Southern Roofing and Waterproofing

    4.7(56 Google reviews)
    Best forCalgary owners wanting roofing and exterior foundation membrane work from one contractor
    In business16 years
    WarrantyManufacturer-backed warranties on materials and systems plus a workmanship warranty; lengths and transferability are not published.
    EmergencyAvailable

    Why we picked them

    4.7 from 56 Google reviews, a Calgary firm founded in 2010 with a documented exterior membrane and sump offering, though roofing is its main trade.

    What we like

    • Foundation membrane, weeping tile, crack injection and sump work listed
    • Commercial parkade and below-grade membranes
    • Founded 2010 with WCB and COR safety standards

    Things to consider

    • Roofing is the main trade, and the reviews read were about roofing, hail and siding.
    Key details
    Best for
    Calgary owners wanting roofing and exterior foundation membrane work from one contractor
    Service area
    Calgary
    Address
    3605 29 Street NE #100
    Years in business
    16 years
    Warranty
    Manufacturer-backed warranties on materials and systems plus a workmanship warranty; lengths and transferability are not published.
    Emergency service
    Available
    Financing
    Available
    Credentials
    COR (Certificate of Recognition) safety standards
  3. 03

    Best for leaking foundation cracks and wet basements

    Wizard Crack Repair Ltd

    4.8(146 Google reviews)
    Best forLeaking foundation cracks and wet basements in Calgary
    In business7 years
    WarrantyLifetime warranty on repairs per the company website: a repeat leak is fixed at no charge. Written terms and transferability not published.
    EmergencyAvailable

    Why we picked them

    4.8 from 146 Google reviews, with crack injection customers reporting dry basements and much lower quotes.

    What we like

    • Reviewers say injected cracks stopped leaking
    • Quotes came in well under competitors
    • Open 24 hours with free estimates

    Things to consider

    • The website gives no licence number or written warranty terms, and its phone differs from Google's.
    Key details
    Best for
    Leaking foundation cracks and wet basements in Calgary
    Service area
    Calgary
    Address
    52 Woodbine Blvd SW
    Years in business
    7 years
    Warranty
    Lifetime warranty on repairs per the company website: a repeat leak is fixed at no charge. Written terms and transferability not published.
    Emergency service
    Available
    Credentials
    Licensed and insured (company statement)
  4. 04

    Best for parging repair and foundation crack sealing

    Calgary Parging

    4.9(430 Google reviews)
    Best forParging repair and foundation crack sealing
    In business14 years
    Warranty5-year transferable warranty on materials and workmanship for new parging; 10 years on stucco and woodpecker-proofing installations, per the written quote.
    EmergencyNot listed

    Why we picked them

    4.9 from 432 Google reviews and a parging specialist with a transferable 5-year warranty.

    What we like

    • Parging specialist with 5,000 projects since 2012
    • Crews praised for punctuality and tidy cleanup
    • Transferable 5-year parging warranty

    Things to consider

    • Lists no drain tile or sump pump work, so it covers exterior coating only.
    Key details
    Best for
    Parging repair and foundation crack sealing
    Service area
    Calgary
    Address
    4132 16 St SE
    Years in business
    14 years
    Warranty
    5-year transferable warranty on materials and workmanship for new parging; 10 years on stucco and woodpecker-proofing installations, per the written quote.
    Credentials
    City of Calgary business licence
  5. 05

    Best for leaky foundations, condo parkades and building envelope water ingress

    Building Works Ltd

    4.8(319 Google reviews)
    Best forLeaky foundations, condo parkades and water ingress traced to the building envelope
    In businessNot listed
    WarrantyNot listed
    EmergencyNot listed

    Why we picked them

    4.8 from 317 Google reviews, and a Siplast certified waterproofing applicator using infrared leak detection.

    What we like

    • Siplast certified applicator with infrared leak detection
    • BCIT certified envelope specialists on the project team
    • Reviewers praise clear communication and tidy sites

    Things to consider

    • Reviews mostly describe envelope, window and deck repairs, and no interior drainage service is listed.
    Key details
    Best for
    Leaky foundations, condo parkades and water ingress traced to the building envelope
    Service area
    Calgary
    Address
    2732 5th Ave NE
    Financing
    Available
    Credentials
    Siplast Liquid Applied Waterproofing certified applicator

Side by Side

Compare the top waterproofing contractors in Calgary

Ranking position reflects our editorial review, not customer ratings.

Editorial comparison of the 5 ranked companies. Customer ratings, where shown, come from the source named on each company profile.
RankCompanyBest forKey servicesService areaGoogle ratingEmergencyProfile
01Groundworks Foundation Repair CalgaryCalgary homeowners with leaking basements, cracked walls or failing sump pumpsCalgary4.8(895)Not listedView
02Southern Roofing and WaterproofingCalgary owners wanting roofing and exterior foundation membrane work from one contractorCalgary4.7(56)YesView
03Wizard Crack Repair LtdLeaking foundation cracks and wet basements in CalgaryCalgary4.8(146)YesView
04Calgary PargingParging repair and foundation crack sealingCalgary4.9(430)Not listedView
05Building Works LtdLeaky foundations, condo parkades and water ingress traced to the building envelopeCalgary4.8(319)Not listedView

Coverage

Waterproofing companies serving Calgary and nearby areas

Most companies in this ranking work across Alberta and the surrounding suburbs. Coverage and travel fees vary, so confirm your address is inside the service area before scheduling.

  • Calgary

Nearby rankings

Service coverage across Calgary. Individual company areas are listed on each profile.

Methodology

How we chose the best waterproofing contractors in Calgary

Companies are listed in the order Google ranks them for basement waterproofing searches in Calgary, read on October 20, 2026. To be included a company needed 4.5 stars or better from at least 50 Google reviews, an operating status, a working website, a staffed street address and a real logo. We rejected virtual offices, template websites and companies with an unrelated main trade. Where a company's main trade is not waterproofing, the profile states that. No company paid for placement.

Read our full ranking methodology
Evaluated5
Ranked5

Hiring

How to choose a waterproofing contractor in Calgary

  1. Verify insurance and credentials

    Ask for a current certificate of insurance and confirm registration or licensing with the authority that issues it, not with the company.

  2. Ask for a written estimate

    Scope, materials, removal, disposal and who pulls the permit should all be named on the page rather than agreed on the doorstep.

  3. Compare multiple quotes

    Two or three bids on the same scope. A number far below the others usually means something has been left out of it.

  4. Understand the warranty

    Separate the manufacturer's warranty on materials from the company's own warranty on the work, and get both in writing.

  5. Ask who performs the work

    Find out whether the crew are employees or subcontractors, and who supervises them on the day.

  6. Check recent local projects

    Ask for addresses or photographs of comparable jobs finished nearby in the last year or two.

  7. Avoid high-pressure sales

    A discount that expires today, or a knock on the door after a storm, is a reason to slow down rather than sign.

  8. Get everything in writing

    Change orders, timeline and payment schedule included, before the first payment changes hands.

Questions to ask before hiring

0 of 10 asked

Red flags

  • No verifiable local business address or registration
  • Pressure to sign on the first visit
  • A demand for full payment up front
  • An offer to cover or waive your insurance deductible
  • Refusal to put warranty terms in writing
  • A quote that will not itemize scope

Keep Going

Related home services in Calgary

FAQ

Waterproofing companies in Calgary FAQs

Do waterproofing contractors in Calgary need a licence?

Alberta has no trade specific waterproofing licence. Ask any contractor for its City of Calgary business licence number, WCB account and proof of insurance, and check building permit requirements with the City of Calgary and Alberta Safety Codes. Alberta Consumer Protection covers business licensing for home services.

What causes basement leaks in Calgary homes?

Expansive clay soil is the usual cause. It swells when wet and shrinks when dry, and winter frost heave adds pressure on foundation walls, so water finds cracks and the floor and wall joint. A contractor should identify the entry point before quoting a fix.

Why does this Calgary list have only five companies?

Only five Calgary companies passed our checks of 4.5 stars from 50 or more Google reviews, a staffed address and a working website. Several results were roofers, general contractors or plumbers, so we left them out. Two entries are closest-to-qualified picks and their profiles explain why.

Editorial Record

About this ranking

Originally published
October 2026
Last reviewed
October 2026
Companies evaluated
5

Need a waterproofing contractor in Calgary?

Or compare the Calgary waterproofing contractors again