Waterproofing Services
Waterproofing Services in NYC
Protecting your property from water damage — rooftops to basements, we’ve got you covered.
Professional Waterproofing You Can Trust
NorthStar Contracting provides expert waterproofing services for both residential and commercial properties across NYC. Whether it’s basement leaks, roof deck coating, or sidewalk vaults — we seal it right, the first time.
Our Waterproofing Specialties
Basement Waterproofing
Eliminate foundation leaks and moisture with expert interior & exterior sealing.
Roof Deck Coating
Durable liquid membranes to protect rooftops and outdoor terraces year-round.
Sidewalk Vaults
We secure underground sidewalk structures from flooding and corrosion.
Expansion Joint Sealing
Prevent leaks at structural connections and movement joints.
Why Choose NorthStar
- Licensed & Fully Insured Waterproofing Contractors
- Serving All 5 NYC Boroughs
- DOT, DOB & Local Law 11 Compliant
- 10+ Years of Experience
Client Testimonials
NorthStar sealed our basement foundation and we’ve stayed dry ever since. Highly professional and on time.— Carlos M., Queens
The sidewalk vault under our building was leaking for years — NorthStar fixed it in two days. Excellent work.— Sarah B., Manhattan