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Sous-Sol Confort

Waterproofing Company in Montreal, Quebec.

Sous-Sol Confort is a waterproofing contractor based in Montreal, QC. Its RBQ contractor licence is reported by the company and not yet verified, so check it with Régie du bâtiment du Québec before work starts.

4.9on Google · 380 reviews
  • TenBestFind Reviewed
  • Top 10 Winner
  • iWhat do these badges mean?
    TenBestFind Reviewed
    Our editorial team has researched and reviewed this business.
    Verified Business
    Key business information or ownership has been verified against a primary source.
    Top 10 Winner
    The company currently appears in at least one active TenBestFind Top 10 ranking.
    Featured Partner
    A paid commercial relationship with TenBestFind. It never earns or influences a ranking position. This company holds no such relationship.

    Advertising & Sponsorship Disclosure

Quick Overview

iHow this is made

This summary is generated from the verified data on this profile: services, service area, credentials, warranty terms and the company's Google review record. It is reviewed by an editor before publishing and refreshed whenever the underlying data changes. Nothing here is asserted that is not stated elsewhere on this page.

Editorial Standards

Sous-Sol Confort is a Laval basement and foundation company that serves Montreal, the West Island and both shores, and it puts a transferable written warranty at the centre of its offer. Its own site lists interior waterproofing with the FlowDrain system, interior and exterior French drains (drain francais), sump pumps with battery backup, polyurethane crack injection and crawl space encapsulation, plus carbon fibre and Power Beam steel wall repair. It publishes RBQ licence 5784-3344-01, offers financing through FinanceIT and gives free estimates. Google shows 4.9 from 378 reviews, read October 21, 2026, and reviewers describe tidy, punctual crews. The office sits roughly 25 to 30 kilometres from downtown Montreal, and the website is in French.

  • Best for interior drains, sump pumps and crack repair on the island
  • Publishes RBQ licence 5784-3344-01 in its website footer
  • Based in Laval, roughly 25 to 30 kilometres from downtown Montreal, so the island is a travel area

Company Facts

Sous-Sol Confort at a Glance

By the numbers

Google rating
4.9out of 5
Customer reviews
380on Google

Rating and review count pulled from Google on October 28, 2026.

The work

Best for
Interior drains, sump pumps and crack repair on the island
Primary service
Waterproofing

Where

Headquarters
Montreal, QC
Service area
Montreal
Emergency service
Not advertised

Money and guarantees

Free estimates
Yes
Financing
Available
Workmanship warranty
Company states a written, transferable warranty on its services, including 25 years transferable on Power Beam wall supports. Confirm the term for your system.

Credentials

RBQ contractor licence
5784-3344-01 (reported by the company, not verified)

Editorial Review

Our Take on Sous-Sol Confort

Sous-Sol Confort is a staffed Laval shop with a published RBQ licence, a long review record and a warranty-first pitch. It reaches Montreal from about 25 to 30 kilometres away, so confirm travel and scheduling when you book. Verify the licence and ask which warranty applies to your exact system.

Best forInterior drains, sump pumps and crack repair on the island

What We Like

  • Publishes RBQ licence 5784-3344-01 in its website footer
  • 4.9 from 378 Google reviews, read October 21, 2026
  • Transferable written warranty, 25 years on Power Beam wall supports
  • Interior and exterior drains, sump pumps with battery backup, and crack injection under one roof
  • Financing through FinanceIT with terms up to 240 months and free estimates

Things to Consider

  • Based in Laval, roughly 25 to 30 kilometres from downtown Montreal, so the island is a travel area
  • Website is in French and names no owners or technicians
  • Google lists weekday hours only, while the site mentions Saturday availability, so confirm before booking

Customer Ratings

Google Reviews for Sous-Sol Confort

Customer ratings shown here come from Google. They are separate from our editorial review above.

Google rating

4.9

Based on 380 Google reviews

Review data updated October 28, 2026

View on Google Maps

Rating Distribution

  • 5 stars97%
  • 4 stars2%
  • 1 star1%
iAbout this distribution

The distribution reflects the 380 Google reviews available when this profile's review data was last refreshed on October 28, 2026. Ratings and counts change continuously on Google, so figures here may lag the live profile slightly. We publish only the values returned by the source, never estimates for missing bands.

Editorial Standards

Ranked#2of 7 waterproofing companies in Montreal, QCre-checked October 2026

Editorial Ranking

Why Sous-Sol Confort Made Our Top 7

It holds position 2 in 7 Best Waterproofing Companies in Montreal, QC (2026).

See the Full Montreal RankingPositions cannot be bought

Areas Served

Based in Montreal, QC.

iAbout service coverage

Coverage is as the business describes it, cross-checked against where its recent documented work is. A company will often travel beyond the areas listed here for a large job and decline a small one at the same distance, so confirm your address before scheduling.

Editorial Standards

Company Background

About Sous-Sol Confort

Sous-Sol Confort puts a transferable written warranty at the centre of its pitch, including a 25-year transferable guarantee on its Power Beam steel wall supports, and that promise runs through a service list built around wet basements and failing foundations. The company is based at 4430 Boulevard Dagenais Ouest in Laval, roughly 25 to 30 kilometres from downtown Montreal. Its own website names Montreal, the West Island, the North Shore and the South Shore as service areas, and it carries a dedicated Montreal page with a before and after crawl space project in Montreal-Est.

The core work is interior waterproofing with the FlowDrain sub-floor drainage system, interior and exterior French drains (drain francais), sump pump systems including battery backup and a triple protection setup, polyurethane injection for foundation cracks from inside or outside, and crawl space encapsulation, reinforcement, insulation and dehumidifier installation. For bowing walls it installs carbon fibre strips or the Power Beam steel supports. Financing runs through FinanceIT with terms up to 240 months, and estimates are free.

Reviews describe crews who cover furniture with plastic, clean up daily and sometimes finish a day early. One homeowner credited Jonathan, Petru and Alex by first name. Another named Patricia, Gray and Alexei after an interior drain and battery backup sump replacement, with Gray praised for explaining how the system works. A third had a crawl space redone in an 80-year-old house and said the crew and management solved a few surprises together. Sous-Sol Confort holds 4.9 from 378 Google reviews, read October 21, 2026, and its site prints RBQ licence 5784-3344-01.

It suits owners of older Montreal-area homes who want one firm for drainage, sump pumps, cracks and crawl spaces, and who value a written, transferable warranty. It suits less well anyone who wants a downtown office, weekend visits (Google lists weekday hours only) or an English website, since the site is in French. Before booking, check the licence on the free Regie du batiment du Quebec lookup at rbq.gouv.qc.ca, and ask about CNESST clearance, proof of insurance and the exact warranty length for the system you are quoted, because the 25-year figure the site states applies to its wall stabilization system.

iWhere this information comes from

Company history, ownership and capability details on this page are provided by the business and reviewed by our editors for plausibility and consistency. They are not the same as the credentials block, where each item carries its own verification status and source.

Editorial Standards

Credentials

  • RBQ contractor licenceRégie du bâtiment du Québec · 5784-3344-01Reported
iWhat verified means here

Verified means we checked the credential against the authority that issues it and recorded the date. Reported means the business told us and we could not independently confirm it. We publish both, labelled, rather than dropping what we could not check.

Editorial Standards

Other Sources

Reputation by Source

We show each source separately rather than blending them into a single score, because they measure different things.

  • Google

    4.9/ 5

    380 customer reviews

  • TenBestFind

    Editorially reviewed

    Ranked #2 in Montreal waterproofing, October 2026

Pricing

Company Pricing & Estimates

What this company publishes about its own pricing.

Free estimates
Yes
Financing
Available
Workmanship warranty
Company states a written, transferable warranty on its services, including 25 years transferable on Power Beam wall supports. Confirm the term for your system.

Gallery

Project Photos

Business-submitted, reviewed by our editors

  • Sous-Sol ConfortSous-Sol Confort
  • Sous-Sol ConfortSous-Sol Confort
  • Sous-Sol ConfortSous-Sol Confort
  • Sous-Sol ConfortSous-Sol Confort
  • Sous-Sol ConfortSous-Sol Confort
  • Sous-Sol ConfortSous-Sol Confort

Compare

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Sous-Sol Confort FAQs

  • Is Sous-Sol Confort licensed to do waterproofing in Montreal?

    Sous-Sol Confort prints RBQ licence 5784-3344-01 in the footer of its website. In Quebec, contractors doing construction work must hold a Régie du bâtiment du Québec licence, and you can check the number, its status and its subclasses for free at rbq.gouv.qc.ca before you sign anything. It is also reasonable to ask for proof of CNESST clearance and liability insurance, which the company's site does not publish.

  • What are Sous-Sol Confort's hours and does it do emergency work?

    Google lists Sous-Sol Confort as open Monday to Friday from 8:00 to 17:00 and closed on weekends, although its website mentions Monday to Friday 8:00 to 18:00 and Saturday 9:00 to 15:00. Because the two sources differ, call 450-962-6888 to confirm. The site does not advertise a 24-hour emergency line, though one reviewer said the crew handled an urgent leak repair before winter.

  • Does Sous-Sol Confort offer a warranty and financing in the Montreal area?

    Yes to both, according to the company's own website. It states that its services carry a written, transferable warranty, including 25 years transferable on its Power Beam steel wall supports, and it offers FinanceIT financing with terms up to 240 months and no penalty for early repayment. The company is based in Laval and lists Montreal, the West Island, the North Shore and the South Shore as service areas. Estimates are free, and you should ask for the warranty length for your specific system in writing.

  • Is Sous-Sol Confort licensed and insured?

    We checked 0 of 1 credentials against the issuing authority. Verified items carry the date we checked; reported items are what the business told us and we could not independently confirm.

  • What areas does Sous-Sol Confort serve?

    Montreal. Coverage is as the business describes it, cross-checked against where its recent documented work is. Confirm your address before scheduling, particularly at the edge of a service area.

  • Does Sous-Sol Confort offer emergency service?

    Emergency availability is not listed for this company. If you need an urgent call-out, check the ranking for companies that do list it.

  • What warranty do they offer?

    Company states a written, transferable warranty on its services, including 25 years transferable on Power Beam wall supports. Confirm the term for your system.. There are usually two warranties on a job: the manufacturer covers materials, the contractor covers workmanship. Get both in writing and check whether the workmanship coverage transfers if you sell.

  • How was this profile built?

    Credentials come from issuing authorities, ratings from the company's Google Business Profile with the date we read them, and the editorial take from our own review of estimates, warranty documents and public feedback. Anything the business told us is labelled as reported.

  • Can a business pay to improve its profile?

    A business can subscribe to manage its own listing details, and it can buy a labelled sponsored placement. Neither changes a ranking position or the editorial assessment on this page.

Is Something Incorrect?

Business information changes. Tell us about an address, phone, website, service area, credential or ownership change, or let us know if this company has closed.

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How We Rank

About This Business Profile

Last reviewed
October 2026
Profile last updated
November 11, 2026
Google review data updated
October 28, 2026
Sources checked
Issuing authorities, Google Business Profile, Company website
Could not verify
RBQ contractor licence (reported only), insurance, founding year
Sponsorship status
No commercial relationship
Sous-Sol Confort4.9 on Google · Montreal, QCVisit Website