Professional Waterproofing Services

Serving Manhattan, Wall Street & Greater New York City

Water is one of the most damaging forces to any building—and in New York City, the risk never stops. From hidden leaks in rooftop systems to aging sidewalk vaults beneath your feet, Bellet Construction provides waterproofing services that safeguard your property, inside and out. For more than 100 years, we’ve helped building owners throughout New York City, including both the East and West Side of Manhattan to protect their investments with effective, long-lasting waterproofing solutions. Whether you’re facing active leaks or working to prevent future problems, we deliver expert guidance and reliable results.

Get Ahead of Water Damage—Call Today!

Leaks don’t wait. The sooner you act, the more you save. Whether your issue is visible or hidden, Bellet Construction offers the professional waterproofing services you need to keep your building secure, dry and code compliant. Call now or contact us online to schedule a site evaluation anywhere in New York City, including both the East and West Side of Manhattan.

Full Building Protection Starts Below the Surface

Water doesn’t just enter from the top. Bellet’s approach starts with identifying every vulnerable point in your building envelope—from rooftops and parapets to basements and foundations.

We use advanced diagnostic tools, including infrared scanning and ultrasound testing, to locate trapped moisture and prevent long-term structural issues. Our team works with precision, making sure the repair fits the cause, not just the symptom.

Our Comprehensive Waterproofing Services 

  • Basement & Foundation Waterproofing
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  • Roof Deck & Membrane Waterproofing
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  • Sidewalk Vault Sealing & Restoration
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  • Through-Wall & Spandrel Flashing
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  • Structural Crack & Joint Sealing
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  • Exterior Wall Coatings & Damp-Proof Barriers

 

Experience That Makes a Difference

Since 1918, Bellet Construction has completed more than 30,000 exterior restoration projects across New York City. Our experience is built into every job. We don’t just waterproof—we integrate solutions that align with the materials and structure of your building. We’re also fully licensed, insured and approved by the NYC Landmarks Preservation Commission, making us a trusted partner for historic and compliance-sensitive buildings.


Honest Inspections. In-House Crews. No Surprises.

Unlike companies that subcontract or overprescribe, Bellet does all work in-house, and only when it’s needed. Our waterproofing inspections are direct and honest. If we find your system is intact, we’ll say so. If not, we explain exactly where the problem lies and how we’ll fix it. That includes guidance on city codes, DOB compliance and even Local Law 11 mandates for building envelope safety.


Why Building Owners Trust Bellet

Choosing Bellet means working with a company that understands every layer of the structure and every line of city code. Our clients include building managers, co-op boards, associations and commercial owners who need results they can depend on.

  • Dual warranty coverage on all work
  • Waterproofing tailored to New York architecture
  • Minimal disruption to building operations
  • Complete façade and roof integration
  • Long-term protection, not short-term patches

 

Professional Waterproofing Services in the Greater New York Area