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Basement Water Solutions

Why ACM For Your Home

Reliable Basement Waterproofing, Foundation Repair & Crawl Space Waterproofing in Long Island

Choosing a basement waterproofing contractor is a big decision. You are letting strangers into your home to do work that affects your foundation, your basement, and the long-term value of your property. We think you should know exactly who you are hiring and why.

Protect Your Home Today

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

What Sets ACM Apart

No other waterproofing company on Long Island can compete with us when it comes to credentials and customer satisfaction. Consider these points:

No Mess No dust, no muddy footprints, no mess. We cover the floors with drop cloths and the furniture with plastic. As one satisfied customer said, “You left my basement cleaner than it originally was.”
Customer Satisfaction We have tons of references you can call and testimonials you can read from satisfied customers all over Long Island. We have never had a complaint with consumer affairs in either Nassau or Suffolk County.
BHA Certified Waterproofing Specialists There are only a handful of BHA Certified Waterproofing Specialists in all of New York State, and ACM is one of them. Certified Waterproofing Specialists are tested experts in hydrogeology, construction, ethics, and safety.
Backed by Research Unlike companies that depend on a steady flow of brand-new “patented products,” our systems are not something we made up to make a quick sale. They are designed by industry experts and backed by decades of research.
Customized Solutions We do not believe in one-size-fits-all systems. We use a variety of solutions and often combine them to make sure your basement stays dry no matter what.
Licensed and Insured We carry full licensing and insurance in both Nassau and Suffolk Counties, so you are protected from the moment our crew arrives until the job is complete.
Warranty-Backed Work Every waterproofing system we install is backed by a written warranty. We stand behind our work because we know it lasts.
Local and Family-Owned ACM is family-owned and operated, based right here on Long Island. We are not a national chain or a franchise. When you call us, you are calling neighbors.
Free, No-Pressure Inspections Every inspection comes with an honest on-the-spot assessment and a clear written estimate. No high-pressure sales tactics and no upselling.

From basement waterproofing to egress window installation, foundation repair to crawl space waterproofing ACM is your trusted Long Island contractor.

Our Owner, Mark McAlpin

Read through our testimonials and you will see the same handful of words over and over: knowledgeable, honest, professional, timely, clean, responsive. You will also see one name come up again and again: Mark.

Mark McAlpin is the owner of ACM, and he is personally involved in nearly every job we do. In most cases, Mark is the one who conducts your inspection, writes up the recommendation, and provides your estimate. That hands-on involvement is rare in this industry, and it is a big part of why ACM has earned the reputation it has.

It is because of Mark’s experience and standards that ACM has become what it is today: the most knowledgeable, qualified, and honest group of waterproofing specialists on Long Island.

What to Expect When You Call

When you call ACM, here is how the process works:

A representative will schedule a free inspection at a time that works for you.
Mark or one of our specialists will visit your home, examine your basement, and ask questions about the issue.
You will get a free, honest, on-the-spot recommendation. If the fix is something you can do yourself, we will tell you that.
If the work calls for a professional, you will receive a clear written estimate with no pressure to commit on the spot.
Once you approve the work, our crew handles everything from start to finish, including cleanup.

The ACM Difference

When you hire ACM, you are not just hiring a contractor. You are hiring a family-owned Long Island business with decades of experience, certified specialists, an A+ BBB rating, and a perfect record with consumer affairs in both Nassau and Suffolk Counties. You are hiring the owner himself to walk through your basement. And you are hiring a team that treats your home the way we would treat our own.

Protect Your Home Today

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