JJM Roofing & Waterproofing

4.9 (69)

1025 Old Country Rd Suite 403 W, Westbury, NY 11590
(516) 508-3781
jjmconstructioncorp.com

Claimed
Roofing contractor
Contractor
Roofing supply store
Siding contractor
Waterproofing service

Service options

  • Onsite services

Accessibility

  • Wheelchair accessible parking lot

Reviews

Reviews are sorted by relevance, with the most helpful and insightful feedback listed first for easy reference.

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Ronald Mayer

2024-02

Just had my roof replaced by JJM. Absolutely the best experience I ever had with a contractor. Dennis was transparent about pricing and quality. So happy I went with them. Cleaned up so well you wouldn’t know they were here. Thanks Dennis I surely will refer you to my circle of friends when they need a roof done!

Bill Pesek

2024-03

Found JJM through an online search and after reading other reviews we gave JJM a call to repair and reseal a flat roof on our building. Dennis and crew were great. From the 1st call up until the end of the project and working around our schedule. Very thorough and very clean work. Would definitely recommend them and plan on using them again in the future.

Alex Hartmann

2023-11

As a new homeowner, making big home improvement decisions can be tough, especially when you're not sure exactly what needs to be done.Luckily, Dennis was honest, friendly, and incredibly helpful in answering all of our questions before and after getting our roof replaced. Carlos and his team were all friendly, incredibly hard working, and very helpful and respectful of our home (even offering to help put back some Halloween decorations after cleaning up!)Highly recommended team of professionals and couldn't be happier with our new roof, thank you!Services: Skylight repair, Roof inspection, Roof repair, Roof installation

April R. Simanoff

2024-02

It rained overnight weeks ago, and the rain came in through the high hat lights in our den bathroom. I reached out to Dennis very early in the morning, and he came to assess our roof that day. Two days later his crew came to repair our roof. The heavyrain, days later, didn't even bring in a single drop into the house.I can't even emphasize how important reaching out to a reliable roofing company is; especially when your home is exposed to the elements! JJM Roofing & Waterproofing saved our home a lot of damage, and their immediate service was not reflected in the cost of the repairs!We will be hiring them again, in the spring, for some additional work to extend the life of our roof.

Robert Hoelzer

2024-01

Called JJM roofing around 11am this morning needing a roof repair done asap, they fit me into their packed day and fixed my problems. Dennis was very helpful and quick to respond. I will recommend them to everyone I know.

Alice Gille

2024-03

After getting other estimates Dennis won as soon as he came through the door. He was friendly, professional . Knowledgable and worked with us for what we needed . He gave us options . The work he and his men did was professional , they were neat, cleaned up after and the work is beautiful . Would recommend 100 per cent!Alice and Bill

Tina Vaidya Patel

2024-02

we had a leak and JJM crew was there right way; they are patient, kind and took time to explain next steps and expectations. There was never any issues after that! They are dependable, professional and reliable. highly highly recommend.

Jarred Palay

2024-01

JJM Roofing is a great company to work with for all your waterproofing issues. They are extremely honest and want to do the best job possible. They weren’t quick to just take my money, but rather do the research and invest time the into the problem. They were also very quick to come out and help.

Frank C

2023-11

Great experience,Everything was explained in detail.I appreciated the offer of differentoptions for our roof & condition itwas in.The owner Dennis came recommended& was a pleasure to work with.Services: Roof repair for storm & wind damage, Roof inspection

Bob Christopher

2023-05

They found and fixed the small leak in my roof. I would recommend them to my family and friends. They were a little pricey for the small job they did, a week's pay for a two man, two hour job and $200 worth of materials. The owner Dennis is a man with integrity and keeps his word and his commitments. I trust him and for that I was willing to pay more. Very honest and easy to work with. No BS and no hassle. His crew did a great job and were very professional. They left no footprint on my property.Service: Roof repair

Bigblue115607

2023-09

Good business is having a heart. I want to thank Dennis from JJM ROOFING for coming to my house and looking out for me and not just his own pocket. He spent his time giving me alternatives to try before spending a ton of money. Businesses like these are hard to come by. Thank you for being an upstanding man and for taking the time prioritize customer satisfaction and for genuinely caring about your clients. I will recommend you to anyone.

Debi Benson

2023-05

Outstanding customer service, professionalism and price!! Returned my call within one hour on a Saturday, came the same day to evaluate, gave extremely reasonable estimate and the repair was completed that Monday. Dennis and his team are truly a pleasure to work with. He turned a stressful situation into a breeze. Quality workmanship on the repair as well, no more leaks!!!Service: Roof repair

katie coe

2023-05

I had a great experience with Dennis and JJM Construction. Dennis came to my house for an issue with a clamshell door I had installed last summer. He was very knowledgeable and personable and made me feel at ease about the situation. He was able to get his crew to my house in a timely manner, and they did a beautiful job, not only fixing the issues but making the final product finally better than I hoped for! I feel very lucky that I had these guys on the job and would highly recommend them for the best work out there!

Julie Ivans

2023-05

We contacted Dennis at JJM roofing to repair a leak on our roof that was getting into our bedroom ceiling. Dennis was quick to respond and send someone over. After they made the repair, the leak returned the next time it rained. However, Dennis was immediately accessible via text and phone even though it was 10pm in the evening when we saw the leak was back. He sent his foreman over the next day, and assured me that they would repair it or we would get our money back. They came back within the next few days and were able to fix the issue. Even though it required additional materials and labor, he did not charge us anything above our original estimate. We have not had any leaking since then. He even texted to check in during a rainstorm to make sure it was ok. Dennis and his crew were professional, reliable, and trustworthy. He stood by his work. Sometimes it is hard to identify where a leak is coming from right off the bat. But they were thorough and made sure that our issue was resolved. I would highly recommend them and will definitely use them in the futureService: Roof repair

Pat Nicastro

2024-01

Our basement flooded with every rain.JJM construction excavated our yard adjacent to the basement, installing a box drain and two leeching drains. After the recent heavy rain the basement is totally dry. We can not be happier with the work done by JJM.

Ben Weixlmann

2023-05

Dennis, the owner, was very professional and came out to survey the roof and then had Carlos come and complete the work. Carlos was extremely knowledgeable and assisted with getting us a new pipe boot and cleaning the skylights off. The preventative maintenance was much appreciated.Service: Roof repair

Justin Vandow

2023-05

We had a leak in the house resulting from a defective ice and water shield that was open. We also had our flatroof redone on our extension that we found out was done incorrectly six years ago by someone who we certainly regret hiring in the first place. I found out about Dennis and his company through my mom who used him. Dennis and his crew came in a timely manner and fixed up what was causing the leak and redid our flatroof. He was honest and everything came out great. We would certainly recommend.Services: Roof repair for storm & wind damage, Roof inspection, Roof repair

Jeanine Entenmann

2023-05

There’s nothing worse than discovering that your roof is leaking during a rain storm. But that’s what happened to us last week. We were so afraid that it would be a costly repair and it would take a while to fix. The best decision we made was calling JJM Roofing. They came immediately to look at the roof. And then they came the next day to repair the roof. They worked so quickly and cleanly, no nails were left behind. I’m so pleased with the service and the repair. I highly recommend them for any of your roofing needs.Services: Attic venting, Roof repair

Michelle Falcone

2022-05

Dennis was great. He sent Carlos over in the evening to look at my roof which was damaged from racoon and then rain. Was very honest and recommended repair. Other companies wanted to do the whole back section. He saved me thousands. Even fixed some siding pieces that were missing and lose. Carlos was great with the work. He explained everything to me. I would definitely recommend them to anybody.Service: Roof repair

Monica

2023-05

I called JJM this morning and spoke with a gentleman named Dennis. The level of expertise, concern and respect he showed this senior citizen was more than I had experienced with any other roofing company I had called. He made sure I understood the process and answered all my questions; even sent someone quickly to look over the issue so he could give me an accurate quote. Better service by far than anyone else had given me.

LaLa Anthony

2023-05

Dennis came out to our house the same day we called for an estimate on roof repairs. He was professional, informative, and honest. I will definitely recommend his services.

john ferretti

2023-10

Dennis and Carlos were fantastic. Timely, clean and efficient and did a great job on my roof. Would highly recommend.Service: Roof repair for storm & wind damage

Judi Vandow

2022-05

I found Dennis to be fair and a really nice guy. He came for the estimate within hours of my call and did the repair within 1week. He took the time to explain everything to me. I will call him again if I need any roof repairs . Trust him, use him .. I’m glad I did !Service: Roof repair for storm & wind damage

Matt Bushman

2022-05

Dennis was very responsive and accommodating for the repair and any questions I had for him. Carlos was super professional and the company as a whole provided quality work in an incredibly quick time frame. Would recommend them for anyone who needs a roofer.Service: Roof repair

Lawanda Daniels

2022-05

We had a portion of the siding on our home damaged by a recent storm and I was very concerned. I called several roofing/siding companies but the only one who responded was JJM Roofing. The owner Dennis not only responded but came on the same day a Sunday no less to survey the damage. He accessed the situation and a member of his team Carlos had it fixed like new by the next morning. The professionalism and fair/affordable cost were greatly appreciated! I highly recommend JJM Roofing for your home repair needs. They are truly the best at what they do! You won’t go wrong! Give them a call today!Service: Roof repair for storm & wind damage

Ashley Okvist

2022-05

Dennis and the crew at JJM Roofing are incredible. The removed a leaking skylight from my roof and reframed the hole. They also re shingled over the skylight and I swear it’s like it was never there! And the inside of the home, not one spec of dust or debri. Couldn’t have asked for a better job from start to finish! The price was fair as well! Will be using for any of my roofing needs! Thanks Dennis and crew!!!Services: Roof repair, Roof installation

Adam Zimmerman

2021-05

Dennis and his guys came to my mothers house in Merrick. Our gutters didn’t seem to be working. We contacted Dennis to take a look and let us know what the cost would be to replace the gutters. After doing the inspection, he told us that there was nothing wrong with the gutters. He said the last person that worked on the roof dropped a caulking tube from a caulking gun in the gutters. Over time this clogged everything up. He said that nothing needed to be done and the problem was fixed. Dennis saved us a lot of money by doing the right thing.Services: Gutter repairs, Roof inspection

S Daniels

2021-05

I have used JJM for years. it started when I had a leak in my roof that many roofers that came could not resolve. A friend recommended JJM and in one visit they identified the leak and proceeded to fix it. Years later when my roof needed replacement JJM took care of that in a very professional manner and at competitive pricing. Recently I moved and JJM did the roof inspection. Also they were there for me for gutter repair and to fix some storm damage. We have always found the owner, Dennis very hands on and response. I highly recommend this companyServices: Gutter repairs, Roof repair for storm & wind damage, Roof inspection, Roof repair, Roof installation

Glouie Vaquiz Figueroa

2023-05

Exceeded my expectations! Dennis did an excellent job at tailoring his services to my needs and was able to perform repairs in record time! Will recommend to family & friendsService: Roof repair

Jay Waldhauser

2022-05

Dennis and his crew were amazing . They replaced my roof in one day and was less money than anyone else . They also installed seamless gutters that made my house look amazing . I definitely recommend Dennis and his companyServices: Skylight repair, Roof repair, Skylight installation

Opening Hours

Monday Open 24 hours
Tuesday Open 24 hours
Wednesday Open 24 hours
Thursday Open 24 hours
Friday Open 24 hours
Saturday Open 24 hours
Sunday Open 24 hours

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