Licensed & Insured, NYC Roofing ContractorLicensed & Insured
NYC Roofing & Waterproofing Experts
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That damp smell in your basement isn't going away on its own. That crack in your foundation wall is getting wider every winter. And every heavy rain that hits Manhattan is another chance for water to find its way in: destroying insulation, rotting wood, triggering mold, and quietly eroding the structural integrity of your building. You already know something is wrong. The question is how much damage is happening right now that you can't see yet.
Roof On NYC protects brownstones, high-rises, townhouses, and commercial buildings across Manhattan. From basement waterproofing to foundation crack repair, we seal water out, permanently. Spring moisture season is here: limited inspection slots available this week. Book now before water damage spreads.
Water damage spreads fast in Manhattan buildings. Small cracks turn into major structural issues. Moisture invites mold, weakens concrete, and damages interiors. We inspect the problem, identify the root cause, and apply long-lasting waterproofing solutions. We use high-grade sealants, membrane systems, drainage solutions, and concrete protection methods designed for New York weather. Whether you own a century-old pre-war building in Harlem, a brownstone in Park Slope, or a mixed-use property in SoHo, our team has the experience to handle Manhattan's unique waterproofing challenges.
Manhattan's aging building stock is under constant assault from water. Clay-heavy soil holds moisture against foundations for months. Freeze-thaw cycles crack concrete every winter. And when a building on your block has a drainage problem, yours is often next.
Roof On NYC delivers trusted waterproofing that property owners rely on every season. We protect brownstones, high-rise buildings, townhouses, and commercial spaces across Manhattan. Water finds weak spots in basements, foundations, rooftops, and concrete walls. Our team seals those entry points with tested materials and skilled work.
Basement Waterproofing Manhattan
Your basement floor shouldn't feel damp. That musty odor isn't normal. It's mold already forming. Standing water after heavy rain is a structural emergency, not a minor inconvenience. The longer you wait, the deeper the damage goes, and the more expensive the fix becomes. We install interior drainage channels, sump pump systems, vapor barriers, and inject foundation cracks to eliminate moisture at the source. Your basement stays dry through every Manhattan rainstorm. Schedule a Basement Inspection
Concrete Waterproofing
That hairline crack in your concrete wall will be a gaping fissure in two winters. Water expands as it freezes, widening every gap it occupies, and Manhattan's winters give it plenty of chances. We apply penetrating sealers, crystalline waterproofing compounds, and protective coatings that block water absorption and extend the life of walls, slabs, and foundations. Protect Your Concrete Now
Foundation Crack Repair
A cracked foundation is not a cosmetic issue. It is a direct path for water, pests, and soil gases (including radon) into your building. Ignore it long enough and you're looking at six-figure structural remediation. We use epoxy injection and polyurethane foam to fill and seal foundation cracks permanently, restoring structural integrity and stopping leaks before they grow. Fix Foundation Cracks Today
Exterior & Interior Waterproofing Systems
Interior patches fail. Interior patching only manages the symptom. If water is pressing against your foundation from outside, it will always find another entry point. Storm floods happen fast. Water wins from both directions, unless you stop it at both. We seal foundations from the outside with heavy-duty membranes and fix drainage from the inside with sump systems. Full protection, one team. Get Complete Protection
testimonials
1. Local Knowledge
Manhattan properties demand specific waterproofing methods. Pre-war brownstones, concrete high-rises, and mixed-use buildings each require different approaches. Our team understands foundation structures, sidewalk vaults, basements, and roof systems.
2. Complete Basement Waterproofing
A wet basement doesn't stay wet. It gets worse. Mold colonies establish within 48 hours of moisture exposure. We install interior drainage systems, sump pumps, vapor barriers, and foundation crack repairs.
3. Fast Response & Scheduling
Every hour an active leak goes unaddressed, the damage radius grows. Roof On Inc. offers same-week inspections and emergency response for active leaks. We work around your schedule to get crews on-site fast, because delay has a cost.
4. Transparent Pricing: No Surprise Costs
We provide clear, written estimates before any work begins. No hidden fees, no upsells, no confusion. You know exactly what you're getting and what it costs, that's the Roof On Inc. promise.
Don't wait for a flood. Common warning signs include basement leaks, musty odors, wall cracks, peeling paint, efflorescence (white mineral streaks), and water stains. Any one of these means water is already getting in. Early inspection prevents costly structural damage.
Professional waterproofing systems can last many years when installed correctly and maintained properly, especially with high-grade materials.
Mold can begin forming within 24-48 hours of moisture exposure, and once it's established, remediation is expensive and disruptive. Yes, by eliminating moisture intrusion, waterproofing removes the conditions mold needs to survive.
Exterior waterproofing stops water at the foundation wall before it enters. Interior waterproofing manages water that does get in, redirecting it safely away. Many Manhattan buildings require an interior approach due to space constraints. We'll recommend the right option after inspection.
Coverage
Free Inspection · Free Estimate · 25+ Years Warranty
Licensed & Insured · Serving all of New York City
