Long Island Basement Waterproofing – Family Owned and Operated

Welcome to ACM Basement Waterproofing of Long Island

ACM Basement Waterproofing is a family owned and operated basement waterproofing company based in Islip, NY.  We serve all of Nassau and Suffolk counties on Long Island. (See our full basement waterproofing Long Island service area here)

At ACM Basement Waterproofing, our main goal is to educate and help you make the best decision on how to protect your primary investment – your home. On our site you’ll find information about common basement water problems and what we do to solve them. The links above provide a bit more information about our company, our customers, our basement waterproofing services, and what sets us apart from the competition. Call us at 631-581-0600 with any basement waterproofing questions and we’ll be happy to help. We will also schedule an estimate to determine the solution that’s right for your basement water problems and your budget.

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ACM solves Long Island’s basement waterproofing problems the right way, the first time! We have satisfied customers all over Long Island, and we are happy to provide you with a list of references in your area.

Waterproofing Long Island homes can be a challenge for DIYers and inexperienced waterproofing companies because there is no one-size-fits-all solution. The soil composition, ground layout, and building structures of Long Island are unique in that there is so much variation from area to area. Because of this, Long Island basement waterproofing solutions vary greatly from one house to another. To solve the issue, an accurate diagnosis of the problem is crucial.

Helpful Links:


best mold removal company on long island south shore first place

Readers of Dan’s Paper voted ACM as the best mold removal company on Long Island and the Hamptons!

best waterproofing company on long island first place

Long Islanders voted ACM “Best Waterproofing Company on Long Island” – four years running!

angies list best waterproofing company for great service

ACM received the Angie’s List Super Service Award for being in the top 5% of all waterproofing companies!









We provide homeowners with estimates for their water issues. We do not do work at houses currently listed on the market, or on newly-constructed homes less than two years old.