Early access in Canada. We are still building our directory for Canada. The profiles here show real public evidence from named sources, but coverage is limited and our checks are not yet as complete as on our UK site. Treat this as a preview, not a full picture.

Damp proofing / waterproofing in Canada

1,274 damp proofing / waterproofing across Canada, each compared on their reviews, credential evidence and evidence from named public sources. Independent evidence, no ads and no paid placement. Add your area below to see who's near you.

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Damp Proofing / Waterproofing

Showing the top 12 of 1,274 damp proofing / waterproofing, sorted by Trust Score.

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What to check when hiring damp proofing / waterproofing in Canada

MyTrustedTraders ranks on independent public evidence. No ads, no paid placement. Use these checks alongside the evidence on each profile before you decide who to contact.

  • Get an INDEPENDENT damp survey, not a free one from the firm that wants to sell you the treatment. A free survey has every incentive to diagnose expensive 'rising damp', when the problem is often condensation, a leak, or high ground level that needs no chemical injection.
  • Insist they identify and fix the underlying CAUSE (a leak, blocked airbricks, poor ventilation, failed pointing) before agreeing to an injected damp-proof course, and ask them to explain why simpler fixes won't work.
  • Get the diagnosis and an itemized quote in writing, and be wary of pressure to sign on the spot for a long 'guarantee' that is only worth anything while that firm is still trading.
  • Trade licensing in Canada is set by each province or territory. Electrical, gas and plumbing are licensed trades almost everywhere (for example ESA for electrical and TSSA for gas in Ontario), so check your provincial regulator that the contractor is certified for the work before you hire.
  • A construction lien is a real risk: in every province an unpaid subcontractor or supplier can register a lien against your home even if you already paid the main contractor. Hold back the statutory amount (commonly around 10%) and get signed lien waivers as you pay.

How to judge a damp proofing / waterproofing

Independent, no-ads guidance. The trade-specific checks that matter most, the warning signs, and what to ask before you hire. Use it alongside each contractor’s public evidence above.

Verify before you hire

  • Basement leaks usually come from grading, gutters/downspouts and drainage, not just the wall: a good contractor diagnoses the source before selling interior or exterior waterproofing.
  • Exterior excavation to the foundation, weeping tile, or a sump pump and backwater valve can need a municipal permit and is partly plumbing work: confirm permits and that drainage connections are done correctly. Some cities subsidise this work.
  • Get a written scope and a meaningful, transferable warranty: and understand whether it's interior management of water or an exterior fix.
  • Check liability insurance and a current workers' compensation clearance (WSIB/WorkSafeBC/WCB).

Warning signs of a rogue contractor

  • Sells expensive waterproofing without first checking grading, gutters and downspouts.
  • Excavates or connects a sump/backwater valve with no permit where one is required.
  • A 'lifetime' warranty with conditions that make it unenforceable, or a large up-front deposit.
  • No proof of insurance or WCB coverage.

Questions to ask before you hire

  • How did you diagnose the source before recommending waterproofing?
  • Does the work need a permit, and does the city subsidise any of it?
  • Is the warranty written and transferable, and what exactly does it cover?
  • Do you carry liability insurance and a current WCB/WSIB clearance?

Frequently asked questions

How do I choose a trustworthy damp proofing / waterproofing?
Compare the public evidence on each profile: how many independent reviews they have and across how many named sources, the rating and how recent it is, any credential evidence, and the company status. A damp proofing / waterproofing backed by several named sources is harder to fake than one found in only one place.
Does MyTrustedTraders rank or recommend damp proofing / waterproofing for payment?
No. There are no ads and no paid placement. Damp proofing / waterproofing are ranked only by the strength of independent public evidence. No one can pay to rank higher, add a badge, or change their reviews.
Where do the reviews come from?
They're imported from named public review sources and always shown with the source named. They aren't reviews written on MyTrustedTraders. We cross-check the same business across sources rather than creating new reviews.
What should I check before hiring a damp proofing / waterproofing?
Confirm credentials and insurance directly with the damp proofing / waterproofing, get a written quote, and run the Cowboy Checker on the business first. MyTrustedTraders helps you shortlist on the evidence. It doesn't replace your own checks before you hire.

More ways to check who to trust

Free, independent checks. No ads, no paid placement.

  • Rogue Contractor Check

    Spot the warning signs of a dishonest business before you hire.

  • Company Health Check

    Check whether the company behind a business is active, dissolved, or in liquidation.

  • Licence Check

    A licence number from a van or quote, checked against every public register included here in one search.

Or browse contractors by tradeAll checks and tools