Basement Waterproofing Services IN Suffolk & Nassau County.
Serving in Suffolk County, Nassau County, and More!




Say Goodbye to Wet Basements
Don’t let water intrusion ruin your basement. Our basement waterproofing services are designed to keep your basement safe and dry. Whether it’s a small leak or a big flood, we have the experience and know-how to fix it. Schedule your free estimate today!
Proven Solutions
Basement waterproofing with years of experience.
Quality Materials
Workmanship that stand the test of time.
Respectful Service
Professional team that respects your home.
Personalized Plans
Because no two homes are the same.
Transparent Prices
Clear pricing and honest recommendations.
We Have The Experience To Keep Your Basement Dry
Water can do serious damage beneath the surface of your home. When rising groundwater or heavy rain creates pressure around your foundation, cracks, settling, and leaks often follow. You might even notice basement walls beginning to bow or water pooling in corners. These are signs your home needs professional attention. At Diamond Waterproofing & Masonry, our job is to take that stress off your plate. Our basement waterproofing specialists have years of experience and have solved all kinds leaky basement issues. Your satisfaction is our priority, we make sure to solve problems the right way, without unnecessary upsells. Here’s a quick look at our general process:
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Customer Reviews
Posted on LaurenTrustindex verifies that the original source of the review is Google. Very impressed with this company. They were fast, scheduled within days of calling and cleaned up really well. Would definitely recommendPosted on Debbie STrustindex verifies that the original source of the review is Google. I was referred to Diamond Masonry by my contractor who knew I needed to replace my front porch, patio, garage floor, driveway and sidewalk. Vinny (Owner) came to my home to assess my property. To say he is thorough is an understatement. Upon hearing that I used to get water in my basement, he said he would not proceed without first checking the interior foundation under the front window. His evaluation revealed a crack that needed to be repaired prior to initiating the original project. He also suggested removing the basement window. An added benefit was a larger patio. Vinny gave me a catalog to review to get ideas for pavers for the porch and patio. We then met at the mason yard. He was most patient and answered all of my questions as I made my final decision. After removing my porch, Vinny identified major termite damage. The house had to be lifted off the foundation and a new sill installed. If this weren't enough, while the crew was using the garden hose in the backyard (which I never use), Vinny's son Chris was checking on something in the basement when he noted a puddle in the back of the house. He and Vinny identified water coming through another crack in the foundation. The water was running down the wall behind the electrical panel. I should mention the panel was replaced a few years ago as it was rotted due to water damage. At that time, I was told the water was coming in via the electrical meter outside. I have to wonder how a prior contractor could have missed the crack. "All's well that ends well." Vinny and Chris and their team were not only a pleasure to have at my home, they are pure perfection. The porch and patio look gorgeous. My neighbors have been stopping by to admire this most beautiful work of art. These gifted craftsmen are "Simply the best".Posted on Alison BahrTrustindex verifies that the original source of the review is Google. Diamond repaired my western block foundation. They did a great job and are keeping an eye on it as it settles. I am glad to recommend Vinny and Diamond to everyone and will use them again.Posted on Victoria KTrustindex verifies that the original source of the review is Google. We contacted Vinny to get an expert opinion on a masonry/waterproofing issue we were dealing with, and he was unbelievably helpful. He took his time to ask about the details surrounding our inquiry, provided recommendations on how best to proceed, and answered the many questions we had with patience and kindness. All his reviews give him the credit he is due; it seems like I am not the only person who had a great experience or first impression. Thank you, thank you Vinny.Posted on JustmcTrustindex verifies that the original source of the review is Google. I called Diamond masonry to get a quote and advice for a leak in our basement foundation wall. Vinny arrived in a timely manner and laid out all the details of what would be required to correct the problem the right way. I felt I was dealing with a knowledgeable professional right from the start. He arrived with his crew and removed a section of existing pavers in our driveway, excavated , repaired and waterproofed the foundation plus replaced /repaired the paved driveway to its original condition. Excellent communication and fair pricing. Highly recommended. Thank you.Posted on Joseph VogtTrustindex verifies that the original source of the review is Google. Very satisfied Everything was done exactly how I imagined. Definitely recommendPosted on Christen RTrustindex verifies that the original source of the review is Google. This is the second time using Vinny and his crew. We had some water entering our basement and they did an excellent job waterproofing the outside foundation. We then had them redo our backyard patio/cement. The guys were so professional and did a wonderful job! I will definitely continue using Diamond on any/all future projects we decide to do. Thank you so much!Posted on Jackie RoselloTrustindex verifies that the original source of the review is Google. I’m not typically one to write a review but these guys were amazing. Owner Vinny was very responsive. Answered all of our questions, fair pricing, and impeccable work. They installed a french drain system in our basement and haven’t seen an ounce of water down there since. Thank you guys so much!Posted on Marlin AlmonteTrustindex verifies that the original source of the review is Google. Vinny, Chris and the Diamond waterproofing team did an excellent job installing French drains and would highly recommend them for waterproofing. My basement would flood during heavy rains and my husband, and I would have a lot of anxiety. Diamond's professionalism made us feel comfortable and the french drain system they installed is the best investment with not having to worry about our basement flooding again. Thank you again for all your great work!Posted on Mike CorrenteTrustindex verifies that the original source of the review is Google. I had every homeowners worst nightmare...water coming into the home through cracks in the foundation. Vinny (The owner) diagnosed and solved my issues in a timely, cost effective , and professional manor. Vinny answered my calls and texts at night and on the weekends. Sometimes you get caught up in reviews of contractors and read some good and some bad - however i can honestly say that their 5 star rating was earned. Thank you to Vinny and his crew! I will be a customer for the length of my home ownership and will be recommending his services to anyone who inquires.
Get a free estimate today! Our basement waterproofing specialists are here to help with reliable, affordable service. With a 5-year warranty and over 500 jobs done, we make sure your foundation is in the best hands.
There’s no one-size-fits-all answer. The best method depends on the source of the issue, whether it’s groundwater, cracks, or poor drainage. We customize every solution to fit your home, using trusted methods like sump pumps, drainage systems, or exterior membranes.
Musty smells, water stains, mold, or peeling paint are common red flags. You might also see wall cracks, puddles, or feel dampness in your basement after it rains, these are all signs it’s time to take action.
Yes, interior waterproofing is often effective and less invasive. We can install interior drainage channels, vapor barriers, or sump pumps to redirect water and keep your basement dry from the inside out.
Absolutely. It protects your home’s structure, prevents mold and costly repairs, all while adding value by making your basement safe and usable. It’s a smart investment in your home’s future.
Leaks are usually caused by groundwater pressure, foundation cracks, or poor exterior drainage. Over time, water finds its way in, especially after heavy rain or snowmelt, so tackling the root cause is key.
The longevity of basement waterproofing depends on the method used, quality of materials, and the condition of the foundation. Interior solutions like sealants and membranes may last 5 to 10 years, while more robust exterior waterproofing systems can last 25 years or more, especially when installed properly with quality drainage.
It depends on the source of the moisture and the structure of your home. Exterior waterproofing stops water before it reaches your foundation walls and is ideal for homes with poor drainage. Interior waterproofing is often used for managing moisture or water that’s already getting inside.. Our team will conduct a detailed inspection to let you know which one is right for you.
Yes, effective basement waterproofing helps prevent mold and mildew by eliminating the damp conditions they thrive in. By keeping water out and managing humidity, waterproofing protects your basement from the type of long-term moisture exposure that leads to poor air quality and potential health risks.
It is possible that basement waterproofing increases your home’s value and marketability. Buyers see a dry basement as a major advantage, it’s a sign that the foundation is in good condition and that the home is being properly maintained.
Preparing your basement for waterproofing depends on the type of service being done. Generally, you’ll want to:
Our professional waterproofing contractors will walk you through exactly what’s needed before work begins.
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