Roofing contractor
Certified Roofing & Exteriors
2441 Buckingham Dr, Windsor, ON N8T 2B4
- Google average
- 4.8
- Ratings counted
- 237
- One and two star
- 11 of 237(4.6%)
- Ontario median
- 2.9%
The first three are Google’s own figures for Certified Roofing & Exteriors, read on 24 September 2026; the share is of every rating Google has counted, not of the review texts on this page. The median is ours — the middle figure among the Ontario roofers we list with enough ratings to compare.
Rating breakdown
| 5 | 215 | 91% | |
|---|---|---|---|
| 4 | 10 | 4% | |
| 3 | 1 | 0% | |
| 2 | 2 | 1% | |
| 1 | 9 | 4% |
About typical — the typical roofer in Ontario sits at 2.9%. A higher share is a reason to read the critical reviews below, not a verdict.
The critical reviews
The one and two-star reviews, first. These are what a star average hides, and they are the reason this page exists.
8 of the 9 one and two-star reviews we hold, most recent first.
- 1 out of 5Mari Claire10 months ago
Overpriced and disappointing” I paid extra expecting a smooth tour, but everything was chaotic. The van was uncomfortable, the driver distracted, and we didn’t see half the places
Reply from the business
Take this down you’re affecting my business. I am a roofing company.
- 2 out of 5Masood JamalEdited a year ago
Not satisfied with the work. Roof still leaking. He informed that shape of roof is such that it will leak when more rain. My view is that he should not had accepted the assignment unless sure that it can be repaired. Instead of doing needful he advised to replaced the entire portion of roof. This advice should have been given at the initial stage. Resulting had to call someone else to do needful. It was found that the lower portion of shingles was not properly fixed and left over shingles portion and screws were lying in the valley. Actually I feel disappointed with his work and commitment.However wish him well and happiness with the request to do work accurately. Thanks. Hello. i am still of the view that you have done my roofing as should be. The procedures of a dead valley roof should have been adopted rather than old traditional method you adopted. you were clearly informed that water is leaking in the area where two roofs are joining. i think it's should be covered under the warranty that you have given. kindly look into it and do needful under warranty and no payment. I just went with the reply of owner of certified roofing's. No doubt they may be professional but I am concerned with the work done on my house. Firstly, before taking the quote, I have shown them the valley ( joint) from where it is leaking and also showed from inside. He confirmed that the issue will be solved and gave him 2000$. for the work. If I agree with him that the roof was not properly designed and the problem cannot be resolved, then should have not accepted the job. However, when he opened the roof and according to him there was some leaking from top. which according to him has been repaired. He didn't touched nor repaired the actual problem. He being a professional doesn't know how to do dead valley end. He satisfied me that the work has been done and balanced payment was made. after few days during rain, the roof was leaking from same place and also from downpour. I called him an
Google cut this review short. The full text is on their Google profile.
Reply from the business
I am seeking legal action against this man for defaming my business and falsifying this review . As all our other reviews have indicated we are responsive and we do great work every now and then you run into a customer like this and there’s really no way to make them happy except for to do free work and redesign the construction of their home. It’s not very often that I have to deal with a customer with such ignorance about the work that was completed about the design of his own home and about the process of construction that he has no idea about. In the middle of January, this customer asked us to come to their home to take care of an ongoing issue where water has been coming into their kitchen edition for years. Upon going on the roof, we could clearly feel under our feet that the plywood was rotten and disintegrating so obviously as any other roofing company would do. We believed the work to be bad so we removed the shingles. We removed the plywood as we told them we would do we installed ice shield Synthetic paper and new shingles none of the work that we have done is leaking into the kitchen presently but what is leaking into their kitchen is as you can see from this customer’s photos whoever designed the addition did not take into the account the eavestrough system that was left stranded between two different roofs. I had mentioned to the customer that this may be an ongoing issue, especially if there’s a lot of rain because it’s filling up like a Valley when there was heavy downpour and leaking behind their Facia and then going into the kitchen. We only discovered this after we returned for a second visit once we had a very serious downpour and suggested to the customer that the work that we did is solid, but this roof needs to be redesigned. An approximate cost would be $5000. It needs to be turned into a flatroof with a low slope. customer brought in another Roofer told me my work was terrible and that their new guy was gonna fix everything lol well
- 1 out of 5Sudiptoa year ago
I paid over $900 to fix a leak last year. This company replaced the board and the shingles on 4x8 area. Replaced a vent but the leak happened at the vent because bad quality workmanship. A new company sent proof that less amount of material used around the vent. I reached to this company first but they did not even send a person to check even after multiple followup. Warranty is worthless for this company.
Reply from the business
All of our other reviews say otherwise. Our warranty on an older roof is six months. There’s no way that we can guarantee that the leak that you have now is not coming from another part of this poorly installed the roof. We did a good job with the Repair. It’s unfortunate that you have another leak, but it’s been a long time and we’ve had plenty of bad weather including the entire winter. This person also gave a restaurant a one star rating because he said his food was too salty just ridiculous.
- 1 out of 5Christ Warriors Street Church3 years ago
Mark will not respond been over 6 months no return call
Reply from the business
Unfortunatley i had to fire a subcontractor i was using because his WSIB and insurance expired. He has taken to make a bunch of separate google accounts to defame me. Certified roofing does not work with unlicensed contractors and take safty with the utmost importance when on customers property. You will see similar comments from :Matt Major, Christ Warriors Street Church, Righaway Building Maintenace and EcoMajor Services and RBM training. Legal action pending.
- 1 out of 5EcoMajor services & R.B.M Training3 years ago
Mark will not call customers back causing a large back log of complaints and leaks he refuses to deal with we have waited months for a return call
Reply from the business
Unfortunatley i had to fire a subcontractor i was using because his WSIB and insurance expired. He has taken to make a bunch of separate google accounts to defame me. Certified roofing does not work with unlicensed contractors and take safty with the utmost importance when on customers property. You will see similar comments from :Matt Major, Christ Warriors Street Church, Righaway Building Maintenace and EcoMajor Services and RBM training. Legal action pending.
- 1 out of 5Matt Major3 years ago
Mark has yet to pay for the last delivery that we loaded for him and has dodged his warranty with almost every past customer leave me no option but to stop fixing his problems for free and looking after his customers on my own time mark has a big problem with purchasing materials that cannot be used with a proper warranty leaving the installers helpless
Reply from the business
Unfortunatley i had to fire a subcontractor i was using because his WSIB and insurance expired. He has taken to make a bunch of separate google accounts to defame me. Certified roofing does not work with unlicensed contractors and take safty with the utmost importance when on customers property. You will see similar comments from :Matt Major, Christ Warriors Street Church, Righaway Building Maintenace and EcoMajor Services and RBM training. Legal action pending.
- 2 out of 5Kim Bendig5 years ago
Dealing with Mark from Certified Roofing has been a very frustrating experience. I had my roof done June 2020 and have been experiencing a leak in my upstairs bathroom, during heavy rainfall, since then. Phone calls go unanswered and messages are not returned. The only time I was able to speak with him directly was if I called from a different number. I have always been polite and professional during this frustrating time. He sent someone to 'fix' the problem 3 months after I reported the leak but I experienced a leak again during heavy rainfall in December. Again my call went unanswered and message not returned. I expect a company to take pride in their work and to follow through if there is an issue. Unexpected things happen and I understand that but do the right thing!
- 1 out of 5OSAMA A5 years ago
I have an appointment and no one show up. When the time come for the warranty, they won’t come or answer or reply to your email.
Reply from the business
wrong company we never did work for u
What reviewers keep mentioning
Topics Google extracted from this business’s reviews, with how many mention each. These are words that appeared in reviews, which is not the same as a service the business sells.
- shingle repair14
- skylight replacement9
- timely repair5
- certified roofing4
- leak assessment3
- fascia repair3
- site cleanup3
- eavestrough replacement2
- reasonable estimate2
- efficient installers2
Other reviews we hold
14 more of the 209 reviews we hold text for, most recent first. We do not hold every review Google has.
- 5 out of 5Marisa Marvin8 hours ago
Great experience working with this company! Mark is super helpful and responsive. Very good pricing and they went above and beyond. Even though there was a waitlist to get a full roof replacement they were still able to come do repairs to make sure everything was holding up in the meantime. Thanks for all your help!
- 5 out of 5Dorothya week ago
Great company with wonderful employees. Special "shout out" to Phoenix, who after another long day still helped my neighbours with a problem.
- 5 out of 5Sarthak Chavan2 weeks ago
I highly recommend Certified Roofing & Exteriors! Mark and his team have completed several projects for me, and every experience has been excellent. Most recently, they replaced the shingles on the roof over my backyard deck, repaired the areas that needed attention, and fixed my gutters. Previously, they also repaired my leaky garage roof by removing an old skylight and installing a new roof in that area. Since then, I haven't had a single leak. Mark was quick to provide a fair and reasonable quote, and he took the time to explain everything that needed to be done in simple, easy-to-understand terms, which I really appreciated. His team completed the work professionally and cleaned up the entire area when they were finished. Thank you, Mark and team, for their professionalism, quality workmanship, and excellent customer service.
- 5 out of 5Guisheng WangEdited a month ago
Mark and his son replaced the skylight for my bathroom, the overall experience was really good, they explained to me what was wrong with my old sky light and also replaced the shingles around the new one. ---------------------------------------- I wanted to add some more information after 1 1 months of the skylight replacement. The storm damaged part of roof and I called Mark and he showed up the same day and provided a quote, and fixed the roof the day after. Really appreciate his prompt action.
Reply from the business
It was our pleasure to help you please pass our name to friends and family!
- 5 out of 5Frank Minardia month ago
We had shingles come off from high winds. I called Certified and they answered right away. Easy to deal with, responsive and, ultimately, did a great job replacing the shingles that were lost. Highly recommend!
- 5 out of 5Tony Palermoa month ago
Great team, showed up and repaired my shingles same day. Heavy wind storm night prior lifted a large portion off and they not only fixed it but waterproofed it also.
- 5 out of 5Sathwik Bavisettya month ago
Called on a Sunday during the rain for a roof check. They arrived within a couple of hours and checked it for free.
- 5 out of 5Rose AEdited a month ago
Saved from another rouge roofer. MARK is a gem in the field. He was so amazing. His prices are not even what make him the best. Sent a nice employee to fix a mess we had been left with the last (claimed) roofer. We owe him still to this day. Knowing how many horrible roofers are out there he's a God sent. Made my kids feel safe again in their home. We can't thank him enough. Best by far.
Reply from the business
Lol it’s Mark but just the same. I want to tell you that me and my staff greatly appreciate that you gave us the work and then that you took the time to do this review. There are a lot of bad boys out there in this industry. I’m glad I could save you from one of them.
- 5 out of 5Beverly Pattenaude2 months ago
Early spring we experienced some tough weather. Sustained winds all day and throughout the night. We had some damage to a soffit but our original roofers had since retired. Certified Roofing was repairing a roof across from us so we spoke to the owner. He assured us he could get to the repair in a timely manner (lots of homes experienced damage) for a reasonable price. His guys showed up within a couple of days and fixed the damage. They were able to salvage the aluminum and you cannot tell there was any repair. Very professional and reasonable price given a very busy time for roofers. Would recommend this roofer for all your needs.
- 5 out of 5Tim BeaudetteEdited 2 months ago
Great service in emergency repais and replacing roof. Workers were great. Would recommend
- 5 out of 5Yook2 months ago
We had numerous areas where shingles were missing and many more were basically flapping in the wind. Of the 4-5 companies that we called, Certified Roofing was the only Company that actually went up on the roof prior to quote. Knowing our concerns with this, Certified got the work done within a few weeks, even though they were booking a few months out. Wouldn’t hesitate to call Certified Roofing again. Thanks to Mark and his team.
- 5 out of 5Peter Brett2 months ago
Mark and his team were thorough and professional to fix our leaky roof. They identified the issues and did what they said they were going to do. They cleaned up the job site very well. I would indeed recommend them for any job.
- 5 out of 5Andrea Moser2 months ago
Very happy with the work and professionalism of his team. My new roof looks great. Mark did a great job of explaining the job from start to finish, quality of shingles, replacing of edge vent, addition of ridge vent to eliminating the box vents giving the best ventilation and of course the warranty provided. Being an older home we wanted added security and had the whole roof redone with new plywood. Next up looking to have our eves updated. I’m very pleased with the work received and highly recommend Mark and his team.
- 5 out of 5Melissa Lewis-Gerth2 months ago
Great experience all around. I had a leaking roof after a storm and mark came out the next morning. His quote was very fair and he put a patch on the leak until they could get out to replace the whole roof. We had more rain and storms and it continued to leak in new places so they came back immediately to cover it with tarp and fit me in about a week later to get the roof replaced. His team is super friendly and answered all my questions. Completed the job quickly and I couldn't be happier! You won't regret hiring them.
The latest post from this business
Posted by Certified Roofing & Exteriors to their own Google profile 2 months ago. Their words, not ours.
Chimney leaks can lead to serious water damage in your home. Certified Roofing & Exteriors Windsor offers reliable chimney leak repair services to protect your property. Prevent bigger issues and keep your Windsor home safe with their expert help. Learn more about how they can assist you.4 days agoLearn more
What Certified Roofing & Exteriors says about itself
Taken from the business’s own website. We have not checked any of it. These are quotes, not credentials — a roofer writing “licensed and insured” on their homepage is not evidence that they are.
Licensed
“…The Importance of Hiring Certified and Licensed Roofers for Your Roofing Needs We can…”
Insured
“…Fully Insured Rest easy knowing that we are fully…”
Warranty offered
“…Installation & Repairs Booking Warranty Weather-Tite FAQ Blog Contact Menu…”
Free estimates
“…Free Estimates Contact us for a free estimate and discover how we can provide you…”
24/7 emergency call-out
“…24/7 Emergency Service. Professional…”
Other roofers in Windsor
Ranked by how many ratings Google has counted.
| Roofing contractor | Google average | Ratings counted | One and two star | Contact |
|---|---|---|---|---|
| Gauthier Roofing and Sidinganswering questions, eavestrough replacement, courteous staff4.9341 ratings1.5% one and two star(519) 727-6622 | 4.9 | 341 | 1.5%5 of 341 | (519) 727-6622 |
| A Plus Roofing & Siding Windsorprofessional crew, personable staff, siding5.0312 ratings0.6% one and two star(519) 562-9729 | 5.0 | 312 | 0.6%2 of 312 | (519) 562-9729 |
| Allstar Roofingshingle repair, professional crew, quick work4.9161 ratings1.9% one and two star(519) 991-3083 | 4.9 | 161 | 1.9%3 of 161 | (519) 991-3083 |
| Elite Constructionpolite staff, quick repair, shingle repair4.6125 ratings8.0% one and two star(519) 816-2760 | 4.6 | 125 | 8.0%10 of 125 | (519) 816-2760 |
| Dayus Roofing Inc | Best Roofing Company in Windsor (Top-Rated Roofers Near Me)polite workers, timely completion, garage roof4.7118 ratings5.9% one and two star(519) 737-1920 | 4.7 | 118 | 5.9%7 of 118 | (519) 737-1920 |
| Quinn Roofing Solutions Incscheduling, residential roof replacement, fair pricing4.377 ratings15.6% one and two star(519) 256-8474 | 4.3 | 77 | 15.6%12 of 77 | (519) 256-8474 |
Where this page comes from
Every figure above is Google’s, captured on 24 September 2026. The star average and the 237 ratings behind it are counted by Google across all of its reviews. The review text on this page is a sample — we hold 237, of which 209 have any text — and it is not everything Google shows.
Roof Warden does not verify licenses, bonds, insurance or workers’ compensation cover, and nothing on this page should be read as though we had. Confirm those directly with the contractor and with your state or provincial licensing body before you hire anyone.