Posted on Google Linda WeissTrustindex verifies that the original source of the review is Google. We feel very fortunate to have found this company. I met with Mike regarding leaks in the basement. He assessed the entire house, gave me options and clearly explained the process. Everyone from Mike, to the secretary in the office to the workers were absolutely amazing. They did the work as promised, gave us a reasonable price, and left the place immaculate. We could not be happier with the results! This is a great family owned business. You can’t go wrong!Posted on Google rose smithTrustindex verifies that the original source of the review is Google. The work was done with the utmost professionalism and competence. The service representative was very thorough in examining the dehumidifier, air purifier and sump pump and provided any service needed including draining the pump.Posted on Google Craig TodaroTrustindex verifies that the original source of the review is Google. Mark took it upon himself to come to my home and examine my issue himself. He is knowledgeable not only in basement waterproofing, but also in land grading, excavating and several other adjacent topics. While it was concluded my issue was not foundation oriented, he did not hesitate to propose several other creative ideas to help address my issue. He has a great disposition, and I would not hesitate to recommend his services to others.Posted on Google Linda RussoTrustindex verifies that the original source of the review is Google. I bought my house 24 years ago, and for 24 years I lived with water coming in to my finished basement. A few years back I hired another company to put in a French Drain System which never worked. As the storms got worse the water in my basement increased. Because of my previous experience I was hesitant to hire another company until I read about ACM and met Mark who was highly recommended by my Home Service Company. Mark spent about 2 hours explaining the process, and what was needed. In February 2025 ACM put a extensive French Drain System which included taking down the sheet rock walls, demoing tile and placing a membrane along the whole perimeter of the drain system. All of this work was completed in 3 days exactly what Mark said. The guys were professional, polite, and best of all they were careful to save my Radiant Heating System which was under the tile. Since the French Drain System was placed I have not had 1 drop of water coming into my basement. I am very grateful to Mark's ACM Company, and was able to refinish my basement without fear of water damage. I highly recommend ACM Basement Water Proofing to all who are having water problems with their basement.Posted on Google Maria LacosteTrustindex verifies that the original source of the review is Google. ACM Basement Waterproofing did an excellent job in my basement, no more water intrusion. The job was handled professionally and on time. I am happy to recommend them.Posted on Google William RothsteinTrustindex verifies that the original source of the review is Google. I chose ACM because of their "Best of Long Island" award, and I'm glad I did. Mark's crew (led by Joe) installed an interior French drain and a sump pump in our basement. Six months later, we've had no problems with water. These guys know what they're doing.Posted on Google Links2282Trustindex verifies that the original source of the review is Google. My wife and I would like to say thank you to Mark and his team for their excellent work installing a French Drain in our finished basement. For years we had to worry about flooding if we got a large amount of rain in a short time. The entire staff was totally professional. knowledgeable, competent and efficient. They were clean and caring and after each day they protected the whole worksite. Without a doubt, we would recommend them for all your basement waterproofing needs.Posted on Google Peter WebbTrustindex verifies that the original source of the review is Google. I called acm after finding water in the basement. Mark answered the call and quickly helped diagnose the issue. He guided me to check baseboard and sure enough a broken valve was causing this leak. It's good to find someone to help a homeowner without rushing to take their money. It's good to find a honest business man
Posted on Google Linda WeissTrustindex verifies that the original source of the review is Google. We feel very fortunate to have found this company. I met with Mike regarding leaks in the basement. He assessed the entire house, gave me options and clearly explained the process. Everyone from Mike, to the secretary in the office to the workers were absolutely amazing. They did the work as promised, gave us a reasonable price, and left the place immaculate. We could not be happier with the results! This is a great family owned business. You can’t go wrong!Posted on Google rose smithTrustindex verifies that the original source of the review is Google. The work was done with the utmost professionalism and competence. The service representative was very thorough in examining the dehumidifier, air purifier and sump pump and provided any service needed including draining the pump.Posted on Google Craig TodaroTrustindex verifies that the original source of the review is Google. Mark took it upon himself to come to my home and examine my issue himself. He is knowledgeable not only in basement waterproofing, but also in land grading, excavating and several other adjacent topics. While it was concluded my issue was not foundation oriented, he did not hesitate to propose several other creative ideas to help address my issue. He has a great disposition, and I would not hesitate to recommend his services to others.Posted on Google Linda RussoTrustindex verifies that the original source of the review is Google. I bought my house 24 years ago, and for 24 years I lived with water coming in to my finished basement. A few years back I hired another company to put in a French Drain System which never worked. As the storms got worse the water in my basement increased. Because of my previous experience I was hesitant to hire another company until I read about ACM and met Mark who was highly recommended by my Home Service Company. Mark spent about 2 hours explaining the process, and what was needed. In February 2025 ACM put a extensive French Drain System which included taking down the sheet rock walls, demoing tile and placing a membrane along the whole perimeter of the drain system. All of this work was completed in 3 days exactly what Mark said. The guys were professional, polite, and best of all they were careful to save my Radiant Heating System which was under the tile. Since the French Drain System was placed I have not had 1 drop of water coming into my basement. I am very grateful to Mark's ACM Company, and was able to refinish my basement without fear of water damage. I highly recommend ACM Basement Water Proofing to all who are having water problems with their basement.Posted on Google Maria LacosteTrustindex verifies that the original source of the review is Google. ACM Basement Waterproofing did an excellent job in my basement, no more water intrusion. The job was handled professionally and on time. I am happy to recommend them.Posted on Google William RothsteinTrustindex verifies that the original source of the review is Google. I chose ACM because of their "Best of Long Island" award, and I'm glad I did. Mark's crew (led by Joe) installed an interior French drain and a sump pump in our basement. Six months later, we've had no problems with water. These guys know what they're doing.Posted on Google Links2282Trustindex verifies that the original source of the review is Google. My wife and I would like to say thank you to Mark and his team for their excellent work installing a French Drain in our finished basement. For years we had to worry about flooding if we got a large amount of rain in a short time. The entire staff was totally professional. knowledgeable, competent and efficient. They were clean and caring and after each day they protected the whole worksite. Without a doubt, we would recommend them for all your basement waterproofing needs.Posted on Google Peter WebbTrustindex verifies that the original source of the review is Google. I called acm after finding water in the basement. Mark answered the call and quickly helped diagnose the issue. He guided me to check baseboard and sure enough a broken valve was causing this leak. It's good to find someone to help a homeowner without rushing to take their money. It's good to find a honest business man
A small leak in your Islip basement doesn’t stay small for long. Water seeps into the crawl space. Humidity rises. Wood beams weaken. Cracks spread through the foundation.
ACM Basement Waterproofing stops the chain reaction before it damages your home. With basement waterproofing, crawl space repair, and foundation repair, we provide comprehensive protection tailored to Suffolk County homes.
Stop problems where they start—schedule your Islip inspection with ACM today.
At ACM Basement Waterproofing, we specialize in turning complex foundation repairs and waterproofing challenges into smooth, straightforward solutions. We’re here to guide you through the process, protect your home, and deliver results you can trust, because your home deserves lasting strength and stability.
Islip, NY Municipal Building
Phone: (631) 595-3500
Email: commissioner-pd@islipny.gov
Location: 655 Main Street, Islip NY
Office Hours: Monday – Friday 8 AM – 4 PM
Islip, NY Links:
Islip NY
Islip, NY Planning and Development
Town of Islip Building and Development
“Good job. Work was done a few years ago and our basement remains dry! Well done.” – Angela, Islip
“Work done quickly and professionally. Excellent quality, very knowledgeable.” – Jerry, Islip
“Very Pleased with Mark and his team. All staff were professional and job was done very well. Very happy with all work and end project.” – Laura, Islip
Take a look at our testimonials page for reviews from customers from other towns.
A leak through the basement walls of your Islip basement can quickly spell disaster. A wet basement is the catalyst for mold, rot, and insect infestation. And, the longer that you wait to address the leak itself, the more costly the repair will become as the damage spreads.
That is the bad news; the good news is that ACM provides trusted, long-lasting basement waterproofing solutions in Islip, NY, that ensure your basement stays dry and your home is permanently protected.
Our team installs interior French drains that run around the perimeter of your basement below the floor. The interior drains collect any intruding water before it can wet your floor and transport it to a below-floor sump pump, which pumps the water out of your basement and safely away from your home.
The completed system runs smoothly and silently, and it is a watchful guardian, so when you hear the summer storms rage outside, you can sleep soundly, knowing that your basement is safe from the devastation of water intrusion.
Along with fixing basement leaks, Blue Umbrella also fixes problematic basement wall cracks. While vertical wall cracks are the normal result of aging concrete and not a sign of a problem, stairstep or horizontal wall cracks can be an issue created by bowing basement walls.
ACM offers foundation repair services in Islip. We install carbon fiber straps vertically along the offending wall. The carbon fiber straps, sealed to the concrete, keep your foundation walls in place, preventing any further bowing from occurring. If you are dealing with foundation cracks in you basement walls, let us know, and we’ll explain how we can fix the issue.
Get your free inspection. Protect your foundation. Keep your crawl space and basement dry.
ACM Basement Waterproofing delivers lasting basement waterproofing, crawl space repair, and foundation repair in Islip. No gimmicks. No pressure. Just solutions that work.
Act now and give your Islip home the protection it deserves.
We make it simple, affordable, and stress-free — with guaranteed results.
