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Long Island Chooses Us
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Linda Weiss profile picture
Linda Weiss
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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!
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rose smith profile picture
rose smith
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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.
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Craig Todaro profile picture
Craig Todaro
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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.
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Linda Russo profile picture
Linda Russo
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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.
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Maria Lacoste profile picture
Maria Lacoste
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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.
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William Rothstein profile picture
William Rothstein
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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.
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Links2282 profile picture
Links2282
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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.
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Peter Webb profile picture
Peter Webb
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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
Bethpage Best of Long Island Winner warded to ACM Basement waterproofing
Angi Super Service Award for ACM Basement Waterproofing in Long Island
Basement Health Association Star award given to ACM Basement Waterproofing in Long Island
Best of Long Island Award for Basement Waterproofing in Long Island
Angi Super Service Award for Basement Waterproofing in Long Island

Mastic Basement Waterproofing Pros for Peace of Mind

Fixing Wet Basements and Crawl Spaces in Mastic, NY Homes

Here’s what’s happening under your Mastic home: hydrostatic pressure from the water table is pushing against your foundation with up to 500 pounds per square foot. When it rains, that pressure doubles.

Your foundation walls in Mastic, whether along Mastic Road or closer to the Forge River, are literally holding back tons of water pressure.

But here’s the simple truth: water always wins unless you give it somewhere else to go. That’s what proper basement waterproofing does—redirects water away from your foundation before pressure builds.

ACM Basement Waterproofing makes foundation protection simple for Mastic homeowners. We install drainage systems and waterproofing that relieves pressure instead of fighting it. No complicated physics degree required—just proven solutions that keep Mastic basements dry.

Schedule your free consultation today. If you need basement waterproofing, foundation repair or crawl space waterproofing in Mastic, you need ACM.

Preparing Your Mastic, NY Home

Mastic, NY Building Department
Address: 1 Independence Hill, Farmingville, NY 11738
Phone: 631-451-8696
Hours: Monday – Friday 9:00 am – 4:15 pm
Contact the Building Department Form

Mastic, NY Links
Town of Brookhaven Building Department Website
Renew Your Building Permit Application
Submit a New Permit Application
Building Forms
Zoning Information

Mastic’s Leading Experts for Your Other Home Projects

To help you get your Mastic project underway, we’ve put together a list of contractors. While we’re happy to share it, ACM doesn’t officially endorse any of the companies listed.

Plumber
Martinez Plumbing Inc.
35 Chichester Ave, Center Moriches, NY 11934
631-879-8093

Electrician
Big Bear Electrical Contracting
45 Ramsey Rd Unit 5, Shirley, NY 11967
631-760-1997

Driveway Paving Contractor
High Definition Concrete Inc
112 Patchogue Ave, Mastic, NY 11950
631-578-3003

Landscaper
Munoz Landscaping
13 Windus Dr, Shirley, NY 11967
631-949-3163

Masonry
Legacy Brick and Stone
5 Hyland Rd, Center Moriches, NY 11934
631-394-7952

Mastic Basement Waterproofing Customer Reviews

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

Mastic Homes Need Real Protection

Here’s the truth: Mastic’s water table isn’t going anywhere. Neither is the pressure on your foundation. You can either accept water damage as inevitable, or you can waterproof your basement properly, repair your foundation correctly, and protect your crawl space permanently.

ACM doesn’t offer Band-Aid solutions to Mastic homeowners. We provide real, lasting protection. Make the right choice for your Mastic property.

Protect Your Home Today

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