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Basement Waterproofing

Long Island Chooses Us

    
 
 
       Posted on Google  
   
   Linda Weiss 
 
 
 
 Trustindex 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 smith 
 
 
 
 Trustindex 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 Todaro 
 
 
 
 Trustindex 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 Russo 
 
 
 
 Trustindex 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 Lacoste 
 
 
 
 Trustindex 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 Rothstein 
 
 
 
 Trustindex 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  
   
   Links2282 
 
 
 
 Trustindex 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 Webb 
 
 
 
 Trustindex 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

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Basement Water Solutions

Trusted Basement Waterproofing Company in Long Island Near You

Suffolk County & Nassau County’s Top Basement Waterproofing Contractor

Looking for a trusted basement waterproofing company near you on Long Island? For decades, ACM Basement Waterproofing has been providing reliable and effective solutions to homeowners throughout Suffolk and Nassau counties.

By using proven interior basement waterproofing and french drain products and having them installed by an experienced Long Island basement waterproofing contractor like ACM Basement Waterproofing, you can rest assured that your basement will stay dry and your home safe.

Protect Your Home Today

We make it simple, affordable, and stress-free — with guaranteed results.

Effective Basement French Drain Installation Near You

The most effective, efficient, and affordable waterproofing solution available is the french drain. In other parts of the nation, the french drain is often referred to as a drain tile, but in the northeast, the term french drain is prevalent.

The french drain was named after American innovator Henry French who popularized the idea in the late 1800s as a means of providing farmlands with proper drainage.

In those days, drain tiles were little more than a ditch filled with gravel and pitched from a high area to a lower one. They were also generally used outside of Long Island homes.

French Drain and Full Wall Drainage Mat

French drain and Bottom Wall Drainage

Perimeter Drains (Drain Tile)

Basement water problems in Long Island often start small—but they can escalate quickly. If you notice any of these signs in your Nassau County or Suffolk County home, it’s time to call ACM Basement Waterproofing for an inspection:

Musty odors or damp air in the basement
Water stains or efflorescence (white mineral deposits) on foundation walls
Pooled water after heavy rain or snowmelt
Peeling paint, bubbling drywall, or warped flooring
Visible mold or mildew
A sump pump that runs frequently or struggles to keep up

These issues indicate that groundwater is finding its way into your basement. Left unaddressed, they can damage your foundation, create health hazards, and lower your home’s value.

Signs You Need Interior Basement Waterproofing in Long Island

If you’ve been searching for basement waterproofing near me, these are the warning signs that prompted other Long Island homeowners to call us. While much has changed in the last 120 years, the simple and elegant design of french drain tile has remained the most efficient and reliable means of keeping water out of a basement.

The invention of plastics and the advent of flexible piping and affordable pumps has significantly improved the french drain design. While such a system can still be installed on the outside of your Long Island home, an external french drain can be prone to clogging.

Because of this, most Long Island basement waterproofers today prefer to install drain tiles around the interior perimeter of a basement, leading to the terms “perimeter drain” or “basement drain tile.”

Today, modern methods and technologies, combined with a century of research, have led to the most effective and affordable wet basement solution available.

In addition to perimeter french drain systems, ACM also specializes in a variety of other interior waterproofing and drainage solutions, including:

When having any system installed, be sure to ask about all of your options, including battery backup pumps in the event of a power outage.

Step-by-Step Installation Basement Waterproofing Process for Long Island

At ACM Basement Waterproofing, we’ve perfected a proven process for Long Island basements:

Inspection & Plan: We assess water entry points, foundation condition, and existing drainage.
Perimeter French Drain Installation: We dig a narrow trench along the inside perimeter of the basement floor and install a perforated drain pipe in a gravel bed.
Sump Basin & Pump: The drain leads to a sump basin containing a powerful sump pump and optional battery backup for power outages.
Water Discharge: The pump moves water up and out of the basement, directing it away from your home’s foundation.
Finishing Touches: We replace the concrete floor over the system and ensure everything is clean and secure.

This method keeps water moving out before it can damage your basement.

Health & Safety Benefits of Basement Waterproofing

A wet basement isn’t just inconvenient—it can be a serious health risk. In Long Island’s humid summers and damp winters, moisture creates an ideal environment for mold growth. Mold spores can trigger allergies, asthma, and other respiratory issues.

Water intrusion can also weaken your home’s structural integrity over time, leading to costly repairs. ACM Basement Waterproofing’s systems protect your home from these hazards, ensuring a dry, clean space that’s safe for storage, living areas, or anything else you need.

Protect your family’s health and your home’s foundation with a proven interior waterproofing solution.

Protect Your Home Today

We make it simple, affordable, and stress-free — with guaranteed results.

Why Interior Waterproofing vs. Exterior Waterproofing for Long Island Homeowners

While exterior waterproofing can be effective, interior basement waterproofing is often the smarter choice for Long Island homeowners—especially in areas with a high water table and unpredictable coastal storms.

Advantages of Interior Waterproofing:

Less disruption: Installed inside, so no need to excavate your yard or driveway.
Year-round installation: Works in all weather, unlike exterior systems that may require dry conditions.
Maintenance access: Easy to inspect, clean, or repair from inside the home.
Cost-effective: Typically less expensive than exterior excavation and waterproofing.

ACM’s interior systems include a perimeter french drain that channels water to a sump basin with a sump pump and battery backup, discharging it safely away from your foundation.

Local Expertise: Long Island-Specific Challenges

When homeowners search for basement waterproofing near me on Long Island, they’re usually dealing with one of these unique local challenges:

High Water Table: Common in both Nassau and Suffolk counties, especially near the shore.
Coastal Storms & Nor’easters: Can overwhelm poorly designed drainage systems.
Freeze-Thaw Cycles: Winter weather can expand cracks in foundations.
Older Foundations: Many Long Island homes have aging concrete or block walls more vulnerable to water intrusion.

ACM Basement Waterproofing has decades of experience designing systems specifically for these conditions—so your home stays dry in every season.

Long Island Basement Waterproofing FAQs

Q: How long does the installation take?
Most Long Island basement waterproofing projects are completed in 1–3 days, depending on size and complexity.

Q: Can you work on a finished basement?
Yes. We can install basement waterproofing in finished basements, protecting the space and allowing a basement finishing company to come in and cover the completed waterproofing.

Q: Will the system work during a power outage?
Yes—if you choose our battery backup sump pump, it will keep working even without electricity.

Q: How long will my french drain system last?
With proper maintenance, interior french drain systems can last a decade or more.

Q: Do you offer warranties?
Yes. We offer strong warranties on the reliable basement waterproofing products we install.

Q: How do I find a reliable basement waterproofing company near me on Long Island?
Look for a local contractor with decades of experience in Nassau and Suffolk counties, verifiable reviews on Angi and HomeAdvisor, and recognition from organizations like the Basement Health Association. ACM checks all three boxes.

Call Long Island’s Basement Waterproofing Company

f you’ve been searching for a basement waterproofing company near you, ACM has been Long Island’s trusted choice for decades. We have helped thousands of Long Island residents with their basement water problems, and we can help you. Call us today to schedule a free inspection and quote.

Protect Your Home Today

We make it simple, affordable, and stress-free — with guaranteed results.

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