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    Alexander Home Improvement

    4.6 (20 reviews)
    Open 8:00 am - 5:00 pm

    Services - Alexander Home Improvement

    Gutter addition

    Gutter installation

    Gutter replacement

    6 More Services

    New roof installation

    Roof replacement

    Siding installation

    Siding repair

    Siding replacement

    Skylight installation

    Alexander Home Improvement Photos

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    Recommended Reviews - Alexander Home Improvement

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    Ridge vent and Heather grey color
    Jimmy A.

    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. 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 did 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!

    Frank Y.

    I'm extremely happy! Alexander stripped and replaced my roof on 6/2/2025. Amazing workforce team on my 1950's era cape cod house . I had a choice of GAF or Owen's Corning products. ( i went Owen's ) Marvin met me and i was impressed. Detailed the process of the job and the products involved I was so concerned about the "doghouse" dormers, as my last roof 25 years ago that was a problem. Marvin assured me the dormers would not be a problem! Alexander website had photos of many past projects with my type of dormers, which reduced a lot of my stress. The price was super competitive, I had two other estimates that started out super expensive, and the estimates were given by very young gentleman, who I could tell had never even been on a roof before. The other companies kept calling with lower and lower prices, almost daily . ( like car salesman do) I don't like doing business that way. Today's roofing really has changed. No more just tar- paper and shingles. it's an amazing process. They discovered and replaced a few small pieces of rotted tongue, and groove wood with quality thick grade ply wood . I'm very happy I chose this Alexander ! Frank - Locust Valley. PS. we've had a handful of super heavy rainfall/storms in the past two months on my new roof this summer. Not a single issue! Their cleanup was also amazing.

    They made my neighbors house look great and they cleaned up after their work. The manner they lined up their shingles in a parallel fashion, using the appropriate drip edge that many roofers leave out is the utmost importance. Even though I did not hire them, as a craftsman, I can see they do quality work and go out of their way to arrive early on the job!

    New skylights with mounding ( one would never know it wasn't like this before )

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    4 months ago

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    25 days ago

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    22 days ago

    I will say the pricing was very fair for the work done, and we would highly recommend them to anyone looking for this type of work.

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    11 months ago

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    6 years ago

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    5 years ago

    Excellent company, competitive rates. Excellent customer service, they did my roof and siding. I highly recommend.

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    4 years ago

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    Review Highlights - Alexander Home Improvement

    Marvin would come check while the crew worked hard and made sure everything was getting done right.

    Mentioned in 11 reviews

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    Nassau Roofers

    Nassau Roofers

    4.8
    (50 reviews)

    Had an issue with the roof that resurfaced after the latest big storm. Nassau Roofers was 1 of 3…read morecompanies I had reached out for quotes. In every step of the process, Nassau Roofers were extremely professional. No drama. No scare tactics. And their price was very fair. Spencer showed up to do the estimate. He explained everything very clearly. Straight forward and professional. Nelson and team showed up early 3 days later and finished the job quickly and cleaned up well. Part of the roof was covered in snow and these guys efficiently cleared everything away and even shared pictures and video afterwards. Megan and Brian are 2nd generation owners taking over from their father. The company has been around for 48 years. The work comes with a 12 year guarantee. It makes us feel good we are dealing with a company with legacy and will be around to take care of issues. We are very happy we picked Nassau Roofers.

    This was the company that did my roof after Sandy and so when I had a problem with a four legged…read moreunwanted visitor in my attic, I called them and they explained to me what to do and they would come and close the hole and they did and it was wonderful they said not to worry. I didn't have to be home they would come and take care of it the next year. I heard something else in my attic they came with a drone found the whole immediately on the other side of the house and promptly fixed it. I couldn't be more thrilled at how quickly they responded to my small job versus the big jobs that they're used to getting. I appreciate that they took my nervousness about having these creatures in my attic. Seriously I thanked them 100 times.

    John Goess Roofing

    John Goess Roofing

    4.8
    (21 reviews)

    This is for anyone trying to find an honest, skilled and reputable roofing company. I was you…read more My search included meeting with 11 contractors over the course of a year. I wish I had heard of John Goess Roofing and met with Marcos first. It would have saved me a lot of frustration and wasted time. He was the last one I met with, and I knew immediately he was who I wanted to work with. My instincts were right. Our roof was replaced 2 days ago, and I couldn't be happier. I hesitate to recommend contractors, not everyone will have the same experience, but I have zero reservations with recommending this company. I even offered my phone number to Marcos if anyone wants to speak to a recent customer. Yes, that helps the company, but I'm just trying to pay it forward. It was all the amazing reviews others left online that made me call Marcos in the first place. So thank you to everyone who took the time. Over the course my year-long search, I did a deep dive on how a roof is supposed to be done. Marcos took pictures during the replacement and I'd be happy to share them so you can see the quality of their work. And price-wise, they were not the lowest and nowhere near the highest, but I definitely feel I got the best quality for my money. John Goess Roofing is a topnotch professional company. Thank you, Marcos!

    Family Run Business that Treats You Like Family…read more It is rare to find a company that combines multi-generational expertise with genuine care, but John Goess Roofing does exactly that. Marcos, his sons Marcos Jr. and Brian, his brother Rodrigo and the entire team truly treat you like family rather than just another customer. They performed a flawless one-day roof replacement using the best materials and workmanship, even going so far as to chase away a pesky raccoon in my attic and repair my crumbling chimney at no extra charge. Every detail was handled with "old-fashioned" care, including their signature hand-nailing technique and an immaculate cleanup that left the site spotless with not a single nail found. As a GAF Master Elite contractor with over 45 years of experience in Nassau and Suffolk, they provided a lifetime GAF Golden Pledge Limited Warranty covering materials and their professional workmanship. The entire process was seamless, professional, and reliable. From the lead foreman, Marcos, to the office staff, the communication was excellent, and the work was performed by a fully licensed, bonded, and insured team. Their A+ BBB rating and long history of Super Service Awards are well-deserved for such exceptional craftsmanship and dedication to excellence. Bottom line: I was thrilled with John Goess Roofing's work and friendly attitude. Whether you need a roof repair or entire replacement, I feel that you could not find a better contractor. They are indeed a family-run business who treats you like a member of their family!

    Royal Renovators

    Royal Renovators

    4.1
    (127 reviews)

    Great work at a great price! We own a townhouse and originally reached out because of a small leak…read morenear the top floor. After Royal Renovators performed a quite thorough inspection, it became clear that the issue wasn't limited to one area. The project ultimately included roofing repairs, flashing replacement, waterproofing around the parapet walls, and some exterior restoration work where years of weather exposure had taken a toll. What impressed me most was how methodical and easy the whole process felt. Sean and his crew were punctual, respectful of the property, and kept the site remarkably organized considering the amount of work being done. There were no surprise upcharges or pushiness, just great work at a great price. The house has been through the ringer with the weather, but can happily report no signs of moisture. It's a relief knowing the work was done correctly instead of simply covering up symptoms.

    After three years of silence, Royal Renovators finally reached out with an apology -- something…read morethat should've happened long ago. Their work was incompetent, costly, and unprofessional, and despite having our contact information the entire time, they never took responsibility until now. We eventually hired 2BQ Roofers, who found and fixed the issue on their first visit. It's been three years with zero leaks since. Meanwhile, Royal Renovators kept charging us without ever providing a real solution. This was a stressful, deceptive, and exhausting experience. I would not recommend this company

    All Weather Guard

    All Weather Guard

    5.0
    (9 reviews)

    We had our roof, gutters and skylights changed a couple of months ago. We decided to go with All…read moreWeather Guard and we are happy with our decision. Brian was a pleasure to work with. He was very responsive. He patiently addressed all our questions and concerns (and we had a lot of questions) prior to starting, during and even after the process. We liked how the quote was very detailed for what would be done. Brian worked with us on setting up all the logistics prior to starting and on the day of the team was on time and efficiently removed and installed the new roof and skylights. Brian came to make sure things were moving along fine. The gutter team had to be scheduled for another day due to the weather but they arrived on time and had everything done within the day. The roof looked wavy at first but after the shingles settled in it looks great! Our attic fan had a few drops get in from rain. Brian had someone come in the next day to take a look and address the situation and it was promptly fixed. Communication was a huge plus for us, we would definitely recommend All Weather Guards.

    We recently had All Weather Guard replace our log cabin style dormer with a similar style. The log…read morecabin siding was not commercially available, so AWG fabricated similar 'logs', painted and installed them. The result is a beautiful dormer that looks like the original. The craftsmanship, quality and value they provided exceeded our expectations. Their crew went about their business in a professional manner. Separately, AWG installed all new gutters (with leaf protection) and leaders on our brick home. Again, the results exceeded out recommendation. We have been dealing with Brian and AWG for many years and they always exceed our expectations. The Saporita Family

    Alexander Home Improvement - roofing - Updated June 2026

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