5Multi-Platform Reputation
10.7/15
Rated on 3 platforms — Google 5.0, HomeStars 5.0, Facebook 3.7; 1.3-star spread between them
Guardian Seal Basement Waterproofing is a waterproofing company serving Oshawa, ON, rated 4.8★ across 104 reviews. Reviewers repeatedly call out its professionalism, tidiness. It carries an N49 Trust Score of 57.2/100 across our 10-factor review. Altogether it carries ~566 reviews across 3 platforms.
5★ from 11 Google reviews
Rated on 3 platforms — Google 5.0, HomeStars 5.0, Facebook 3.7; 1.3-star spread between them
Has a working website
Not in the Google Maps local top results
~1.0 years on Google Maps (from total-reviews ÷ monthly rate)
Not on Three Best Rated / BBB
~566 reviews across 3 platforms
Mentions 19 service areas on home page (e.g. ajax, aurora, brampton, burlington, markham)
On 2 extra platforms; reachable by website, phone
3 platforms linked: Facebook, LinkedIn, X · ~3 Facebook reviews
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By Caryle Jackson on Jun 29, 2026 Verified by Google
The Guardian Seal team was here promptly, worked professionally and delivered a first class result. The roof looks great. Thank you very much
By Alan Cockle on Mar 4, 2026 Verified by Google
Awesome stress less service from start to end. Nate is the Man, totally on to it when it comes to quality friendly service provision, Totally recommend!. Keep up the awesome work team. Alan Cockle, Te Kauae Marae and Orahiri R Trust.
By Bevan Gray on Dec 6, 2025 Verified by Google
We have just had Guardian Seal put onto our roof in Ohope, the two guys that came out to do the work were complete professionals. It was a big job and they did a fantastic job.
They did a thorough clean first before manually sealing every possible water ingress point. Then they put guardian seal on the whole roof, we changed the colour of our roof and couldn’t be happier with how it looks. Highly recommended.
By Dianne Freeland on Oct 30, 2025 Verified by Google
I am very happy with how my roof has turned out. Communication has been great and hassle free.
Sam was so lovely to work with telling me the steps that would be done and was very friendly. I couldn’t have asked for a better person to do my job.
Would definitely recommend these guys
By Trish Fryett on Mar 9, 2025 Verified by Google
Charlie and his team did an amazing job of painting my roof.. They sprayed the mould several weeks prior to painting, then water blasted redid the grouting and several coats of paint. I’m so very happy with the result it looks like new. They guys were very polite and helpful while working on my property.
I have no hesitation in recommended Charlie and his team
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Guardian Seal Basement Waterproofing 4.8 out of 5.0 based on 104 user reviews.