Long Island’s Basement Waterproofing Company
Trusted & Proven Basement Waterproofing, Foundation Repair & Crawl Space Waterproofing in Suffolk & Nassau County
ACM Basement Waterproofing is a family-owned and operated business providing expert basement waterproofing, foundation repair, and crawl space waterproofing throughout our Long Island service area. Since 1991, we’ve protected thousands of homes across Nassau and Suffolk counties, from coastal properties facing storm surge to inland homes dealing with high water tables.
We’re not a franchise—we’re your Long Island neighbors who understand exactly what our local conditions demand. We help you make the best decision that’s right for your basement water problems and your budget. No high-pressure sales, just honest solutions that work.
Call 631-581-0600 for your free inspection and quote.
Recognized, Reviewed & Awarded Basement Waterproofing Services
ACM solves Long Island’s basement waterproofing problems the right way, the first time! For our years of reliable service to homeowners and businesses in Long Island, we have been recognized and awarded.
From Angi’s to HomeAdvisor to multiple Best of Long Island awards, over and over, the quality of our work and our focus on top-notch customer service is the reason why we are Long Island’s top choice for basement waterproofing, foundation repair, and crawl space waterproofing. We are also recipients of the Basement Health Association Star Award, given to basement waterproofing companies identified as providing the best possible product and service for their customers.
Thousands of Basements Waterproofed Across Long Island
For over twenty years, ACM Basement Waterproofing has provided expert basement waterproofing, crawl space waterproofing, and foundation repair services to thousands of homeowners and business owners throughout Long Island.
We are one of only three companies in New York that have received the Basement Health Association’s prestigious star award. When you choose ACM, you are choosing reliable, top-notch solutions.
Waterproofing & Foundation Repair in Suffolk & Nassau Counties
ACM Basement Waterproofing serves all of Nassau and Suffolk Counties on Long Island, where waterproofing challenges vary dramatically from town to town. The soil composition, water table depth, and drainage patterns change completely between neighborhoods—sandy soil near Long Beach behaves nothing like the clay found in Syosset, and coastal flooding in Freeport requires different solutions.
This variation is why one-size-fits-all waterproofing fails on Long Island. After 30 years serving local communities, we know that accurate diagnosis of each property’s specific conditions is crucial to designing the right basement waterproofing, crawl space, or foundation repair solution.
Our Waterproofing & Foundation Repair Services in Long Island
At ACM Basement Waterproofing, we know that every Long Island home is different—so your waterproofing solution should be too. Unlike national franchises that rely on templated systems, we deliver fully customized repairs for basements and crawl spaces.
Whether you’re dealing with water intrusion, foundation cracks, or a damp, musty crawl space, our team tailors each solution to your home’s structure, soil conditions, and specific issues. No cookie-cutter fixes. Just honest, expert work designed to protect Long Island homes for the long haul.
Basement Waterproofing in Long Island
Your basement is part of your Long Island home, but water or moisture can make it a battleground. A wet basement can result in mold, rot, insects, rodents, and property damage. But ACM’s Long Island basement waterproofing system protects your basement.
We use non-intrusive, effective interior french drains, sump pumps, and discharge lines to keep your basement safe and dry. If you have basement water problems, call Long Island’s basement waterproofing company – ACM.
Crawl Space Waterpfoofing in Long Island
Not every Long Island homeowner has a basement. Instead, you could have a crawl space. Unfortunately, crawl spaces fall prey to the same issues as basements – water, mold, insects, and rot. But, unlike a basement, crawl spaces often go unseen, but that doesn’t mean they should be ignored.
The humid, mold-spore-filled, poor air from your crawl space is sucked up into the rest of your home, where it can cause health issues. A Long Island crawl space waterproofing system can make all the difference by protecting both your crawl space and your upstairs.
Foundation Repair in Long Island
When you walk down into the basement of your Long Island home, do you notice cracks along your basement walls? If you look closer, is the foundation wall bowing inward? If so, you need ACM, Long Island’s foundation repair company.
Using proven, effective foundation repair methods, we can repair bowing foundation walls before the issue grows more severe and more expensive. Reach out to us today to schedule your Long Island foundation repair quote. Let us help secure your foundation.
Learn More About Waterproofing & Repair
Water damage often starts small—a musty smell, a hairline crack—but catching problems early saves thousands in repairs. We’ve put together resources based on decades of experience in Nassau and Suffolk County homes to help you understand what’s happening in your basement or crawl space and when to take action.
- Do you need basement waterproofing? Our DIY home inspection checklist shows you the warning signs of an unhealthy basement
- The 8 most common ways water gets into your basement
- The health risks of a damp basement
- What our customers have to say about ACM Basement Waterproofing
Our Past Basement Waterproofing, Crawl Space Waterproofing & Foundation Repair Jobs For Long Island Homeowners
From foundation repair in Freeport to basement waterproofing in Garden City, we’ve protected thousands of Long Island homes for decades. Every basement we’ve dried, every crawl space we’ve protected, and every foundation we’ve repaired tells a story—families in Nassau and Suffolk counties who no longer worry when storms hit.
These aren’t just jobs to us. They’re your neighbors’ homes, from modest Levittown ranches to North Shore estates, each requiring the right solution for their specific water problems. Take a look at how we’ve helped Long Island homeowners transform wet, vulnerable spaces into dry, protected foundations that last.
Protect Your Long Island Home With Expert Waterproofing & Repair!
The small crack you ignore today becomes next year’s flood. The musty smell you’ve gotten used to is actively damaging your home’s structure. The spot of water on your basement floor can become a pool.
ACM has protected Nassau and Suffolk County homes for over 30 years. One free inspection shows you exactly what’s happening in your basement, crawl space, and foundation—no obligations, no pressure.
Call 631-581-0600. Stop worrying every time it rains.