West Islip Basement Waterproofing

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Long Island Chooses Us

Linda Weiss

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!

rose smith

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.

Craig Todaro

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.

Linda Russo

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.

Maria Lacoste

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.

William Rothstein

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.

Links2282

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.

Peter Webb

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

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West Islip Basement and Crawl Space Moisture Solutions That Last

It’s not just the water in your West Islip basement that’s the problem; it’s the foundation cracks letting it in and the poor grading making it worse. Homes near Higbie Lane and throughout the neighborhoods down to Great South Bay face this combination of issues.

Water finds every weakness, and once inside, it creates new ones, expanding cracks and deteriorating mortar joints in a continuous cycle.

Breaking this cycle requires addressing both problems, which is exactly what ACM Basement Waterproofing does for West Islip properties. Our foundation repair services seal existing entry points while our waterproofing systems, including sump pumps and interior French drains, manage water comprehensively.

One solution without the other just delays the inevitable. Get complete protection for your West Islip home with a consultation from ACM today.

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West Islip Completed Job Stories

Nicholas, 2026, West Islip – Basement Waterproofing

Nicholas contacted ACM Basement Waterproofing to address water issues in his West Islip home. A rear window had become a major source of flooding, and the basement needed a proper drainage solution.

Our team installed a complete interior basement waterproofing system, including 43 linear feet of French drain to capture water along the perimeter and direct it away from the living space. Two sump pumps were installed to handle water removal. To permanently resolve the flooding at the rear of the basement, we blocked up the problem window entirely. We then installed two new window wells with window tap drains tied into the French drain system, ensuring any water near the remaining windows is channeled safely away.

Nicholas’s West Islip basement is now protected with a waterproofing system built to handle Long Island’s wet seasons.

“The guys at ACM were great they were very professional and extremely clean. I could not get over how clean they cut my house even though this is an extremely messy job. They did the job well and as promised and finished on time and was a very reasonable price I highly recommend this company for anybody that has base issues. They are fantastic!”
-Nicholas, West Islip, Jan 2026

West Islip Basement Waterproofing Customer Reviews

Customer reviews from West Islip coming soon! In the meantime, take a look at our testimonials page for reviews from customers from other towns.

Schedule Your Free West Islip Waterproofing Estimate

Notice hydrostatic pressure signs in your West Islip home? You should. Efflorescence on walls, spalling concrete, bowing walls. These aren’t cosmetic issues.

These require professional intervention immediately. ACM provides engineered basement waterproofing solutions, comprehensive crawl space repair, and structural foundation repair near you. West Islip’s technical problems need technical solutions. We have them.

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