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
Keeping your Bay Shore home safe, comfortable, and strong for the future starts from the ground up. At ACM, we specialize in basement waterproofing, crawl space repair, and foundation protection that go beyond quick fixes — offering real, lasting solutions. Moisture problems often begin out of sight, weakening structures and compromising the air your family breathes.
That’s why our approach in Bay Shore focuses on prevention, durability, and total peace of mind. Whether you’re seeing early warning signs or simply want to safeguard your home, Bay Shore team is ready to help. Reach out today to schedule an inspection and start protecting what matters most.
“Very flexible when it came down to doing the work. Made adjustments and adhered to my expectations. Extremely professional and friendly. Thanks again.” – Stephanie, Bay Shore
“From proposal to completion I found ACM to be professional and reliable. All work was done in a workmanlike fashion with a minimum of disruption. I would not hesitate to recommend ACM to anyone in need of their service.” – Herbert, Bay Shore
“We were going to have an exterior sealing but Mark found that sump pumps were more successful and suggested with go with a French drain. It was worth the extra charge for sure, but what impressed us was the price.” – Jennifer and Mike, Bay Shore
“The job was completed as promised. The job was messy, but it was cleaned up nicely. So far we haven’t had any problems with water on the floor as before the job was done.” – Diane, Bay Shore
“No more papers and no more towels!!” – Barbara, Bay Shore
Take a look at our testimonials page for reviews from customers from other towns.
In Bay Shore, a damp basement can affect air quality on every floor of the house. Air naturally moves upward from lower levels through a process called stack effect. That means humidity, mold spores, and musty odors from the basement don’t stay downstairs. They rise into living spaces, bedrooms, and anywhere else air circulates, even if the basement door stays closed.
ACM Basement Waterproofing installs interior waterproofing systems that address the moisture at its source. Perimeter French drains capture groundwater before it spreads across the floor, directing it to sump pumps for removal. Crack repairs and drainage channels seal off entry points along the foundation. For Bay Shore homes where the basement has been quietly affecting the whole house, ACM’s systems eliminate the dampness that feeds poor air quality upstairs.
Crawl spaces in Bay Shore that stay damp for long periods can develop mold on the wooden framing above. Floor joists and subfloor sheathing provide the organic material mold needs, and persistent moisture supplies the rest. What begins as surface discoloration can spread across structural components, weakening wood over time and releasing spores that eventually reach living spaces.
ACM provides crawl space waterproofing in Bay Shore that stops the conditions mold needs to grow. Crawl space drains collect water at ground level, and sump systems remove it from beneath the home. Keeping the crawl space dry protects floor framing from mold damage and prevents spores from becoming an ongoing source of air quality problems in the house above.
Foundation wall movement in Bay Shore isn’t always obvious at first glance. A wall can bow inward gradually over years, and the curve only becomes clear when someone holds a straight edge or level against the surface. That visible deflection means the wall has been under sustained pressure from saturated soil outside and has already started to give way.
ACM specializes in foundation repair for Bay Shore homeowners, using carbon fiber reinforcement systems to stop bowing before it progresses further. Carbon fiber strips bond directly to the foundation wall, locking it in its current position and preventing additional inward movement. Identifying and addressing wall bowing early avoids more extensive repairs down the road. Pairing foundation stabilization with waterproofing also reduces the soil saturation that creates the pressure in the first place.
At ACM Basement Waterproofing, we don’t just fix your basement, we work with you. We make foundation repair a hassle-free experience, offering clear guidance and innovative solutions that ensure long-term protection for your home. Your peace of mind is our top priority.
Bay Shore; Islip NY Municipal Building
Phone: (631) 595-3500
Location: Islip Town Hall West
401 Main St, Islip, NY 11751
Office Hours: Monday – Friday 8:30 AM – 5:00 PM
Bay Shore Links:
Bay Shore; Islip NY Municipal Building
Town of Islip Planning and Development Department
Town of Islip Building Department
Here is a list of contractors who may assist with your home projects in Bay Shore. ACM does not specifically endorse any of these contractors.
Plumber
Wilson’s Plumbing Heating HVAC & Electric
1062 Udall Rd, Bay Shore, NY 11706
631-855-5832
Electrician
Allways Electric Corp.
262 Orinoco Dr, Brightwaters, NY 11718
631-666-0477
Driveway Paving Contractor
Royal Pavement Solutions
2 W Beech St, Islip, NY 11751
844-777-7924
Landscaper
Softwind Landscaping, Landscape Design & Masonry
311 Main St, Islip, NY 11751
631-553-5927
Masonry
Turcio Designs. Design & build
40 Texas Ave, Bay Shore, NY 11706
631-720-0406
When it comes to your Bay Shore home, nothing is more important than keeping it safe, dry, and protected for the long haul. That’s exactly what ACM has been delivering to Bay Shore families for decades. If you’re seeing signs of water damage, foundation cracks, or crawl space moisture, don’t wait for the problem to grow.
Contact us today to schedule a detailed home inspection. Our Bay Shore waterproofing specialists will answer your questions, walk you through the solutions, and help you regain the security and peace of mind you deserve.
We make it simple, affordable, and stress-free — with guaranteed results.
