Basement Waterproofing
Interior and exterior systems built for Long Island's high water table — and for the summer cloudburst that fills a Melville basement overnight.
Melville · Serving Suffolk County & Long Island
Long Island's water table doesn't need much — one hard August rain and a 1960s basement in Melville or Huntington takes water. Dave Muller looks at your foundation himself, explains what the water is doing, and quotes a fair price for fixing it. That's the whole pitch. The reviews say the rest.
What We Fix
Interior and exterior systems built for Long Island's high water table — and for the summer cloudburst that fills a Melville basement overnight.
Cracks, bowed walls, and settling slabs in 1950s-70s foundations — diagnosed in person by Dave and explained plainly before anything is quoted.
Regrading, surface drains, and downspout runs that carry roof and yard water away from your foundation instead of letting it soak in against the walls.
Why Neighbors Call BSU
Reviewers keep writing the same thing: Dave came to the house, walked the foundation, and answered every call and text. The person who diagnoses your basement is the person whose name is on the company.
Before any quote, you'll understand where the water is coming from and what your real options are — including when a smaller fix will honestly do the job. Several of our 72 reviews mention learning more in one visit than from every other estimate combined.
More than one review tells the same story: other companies quoted outrageous numbers, and BSU did the work right for a fair price. We keep it that way — it's why the rating is 5.0 and not 4.9.
In Their Words
"Dave Muller and his team at BSU were exceptional to work with. Dave was responsive in all forms of communication: phone calls, texts, emails, and most importantly, in person. He came to our home several times and shared so much knowledge."
"Dave is extremely knowledgeable about foundation issues and the best way to fix them. We hired him to replace a concrete slab and add drainage to divert water away from our home's foundation. He was always available to answer any of our questions."
"After the August rain my basement was leaking and I took on water. I reached out to multiple companies to get quotes for waterproofing and they were outrageous for me financially. Dave came and out-quoted me."
Where We Work
From the moraine neighborhoods where clay-rich soil holds storm water against foundation walls, to south-shore streets where the water table sits just below the slab — we work on the problems Long Island houses actually have.
Straight Answers
Much of Long Island sits on a high water table, and parts of Suffolk County have clay-rich glacial soil that drains slowly. A hard rain — like the August storms that flood basements across Melville and Huntington — raises water pressure against your foundation fast, and any crack or gap lets it through. The fix is managing that water with drainage and waterproofing, not just patching the spot where it showed up.
Often, yes. Long Island's postwar neighborhoods are now 50 to 70 years old. Original footing drains are frequently clogged or were never installed, and decades of freeze-thaw winters widen small cracks. None of that means your foundation is failing — it means it needs the drainage a modern build would get from day one.
That's exactly what the free estimate answers. Sometimes water in the basement is really a grading problem outside; sometimes a crack is cosmetic and sometimes it's structural. Dave walks the property, explains what the water is doing, and tells you which fix actually matches your problem — including when the smaller job is enough.
Nothing. Estimates are free and on-site. You'll get an explanation of what's happening and a written price. Several of our reviews mention that our quote came in well under others for the same work — we think you should get more than a number for your afternoon.
That's us — 72 reviews on Google, all five stars, most of them naming Dave personally. We'd rather let homeowners in Melville, Dix Hills, and Huntington tell you what working with BSU is like than write our own praise here.
Yes — slab replacement and the concrete work that goes with foundation and drainage jobs. If a project needs excavation or machine work, Dave operates the equipment himself rather than subbing it out.
Free Estimate
The damp corner, the crack that got wider, the puddle that showed up after the last storm — describe it and we'll take a look, explain what's happening, and give you a fair written price. No pressure, no scare tactics.
Rather call? (516) 620-3233