Alexander Home Improvement Corporation

Marvin did a great job on my siding and windows. His work came out perfect and was also the most reasonably priced! Highly recommend. I’m posting the before and after photos.

I’m so happy and please with the way our home has come out. Marvin, Greg and team have fulfilled all that we asked for and more. From the moment Greg the salesman came to our house we felt very comforted going with Alexander. They were wonderful to work with. They completed our roof, siding, stone work, azek trim, lighting and foundation repair. They are very responsive; worked with us to stay within our price range while also not skipping any corners that we were looking for. All of their employees are hard working, on time, stay late to get the job done. They were amazing to work with and highly recommend them!! Thank you again for the beautiful job you all did!

Great company ! I’m lucky to have hired them.
Marvin was amazing! He explained the whole strip and install process to me ! Times have changed since my last roof, It’s a whole new roofing process now- a- days !
I have a simple cape cod with 2 “dog house” type dormers. which gave me issues on my last roof 25 years ago.
Marvin assured me i’d have no dormer issues with his roof.
The company’s website showed past jobs with my type of dormers. Great peace of mind !
The crew showed up on time and ready to go. Pure team work and very detailed and talented ( and safe)
I received a VERY fair price. I chose the Owen’s Corning shingles and Marvin, at my request helped me pick the right color based on the house and neighborhood to blend in perfectly .
The job was done in 1 day ( house and 2 car garage ) and Gutters installed the following morning .
I waited 3 months to write this review. We had some extremely heavy rain storms this Summer of 2025.
I had zero issues !
The Clean up was suburb ! Not even one loose nail found.
I hope you give Alexander Contracting a chance.
Frank - Locust Valley 8/29/2025

Alexander Roofing was awesome to work with! Not only did they give me the best price, but they also really stand by their work. They’re an Owens Corning Platinum Preferred contractor (I even double-checked on the Owens Corning website), which gave me extra peace of mind when choosing them.

The whole team was super friendly, and the job was done in just one day without having to reschedule. They even registered my shingles with Owens Corning, and I got the email confirmation right after the work was finished. I did notice a small blemish afterward, but when I let them know, they immediately sent someone out to fix it—no chasing or runaround at all.

I chose the Heather Grey Duration shingle.

Honestly, it's rare to find a company this professional & easy to work with. Highly recommend Alexander Roofing if you want quality, value, and peace of mind all in one. All in all, great service, great value, and a company that actually delivers on their promises. Highly recommend!

Alexander Home Improvement did an excellent job on my roof. The company was very professional. They were very good about protecting everything around the house, making sure not to damage or break anything. Any items that were moved were put back exactly how it was. They made sure to clean up everything, not even leaving a nail on the ground. All of the workers were respectful, courteous, and friendly. I highly recommend this company if you are looking to do your roof and the price was reasonable and affordable. Would I use them again? Yes, I would, and I'm considering having the same company redo my siding on the house.