WATERPROOFING SOLUTIONS

Stop Water Damage
Before It Starts

Expert waterproofing solutions protecting NYC properties from moisture infiltration and structural damage.

Licensed
Fully Insured
EPA Lead RRP Certified

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500+
Projects Completed
35+
Years Experience
EPA Lead
RRP Certified
NYC DOB
Licensed Contractor

Our Waterproofing Services

Comprehensive waterproofing solutions to keep your NYC property dry, safe, and structurally sound.

Basement Waterproofing

Interior and exterior basement waterproofing systems that eliminate moisture, prevent mold growth, and protect your property's foundation from water damage.

Foundation Sealing

Professional foundation waterproofing and sealing to prevent water penetration at the most vulnerable point of your building's structure.

Below-Grade Protection

Advanced below-grade waterproofing membranes and drainage systems designed to handle NYC's high water table and heavy rainfall conditions.

Balcony & Terrace Waterproofing

Specialized waterproofing for balconies, terraces, and rooftop decks. Prevent leaks into units below with proven membrane and coating systems.

French Drain Systems

Interior and exterior French drain installations that channel water away from your foundation, keeping basements and crawl spaces permanently dry.

Crack Injection & Repair

Precision epoxy and polyurethane crack injection to seal foundation cracks and stop active water leaks. Permanent repairs that prevent further structural damage.

Why Choose Sheltech

What sets us apart from other waterproofing contractors in New York City.

Advanced Diagnostics

We use moisture mapping and infrared technology to identify the exact source of water intrusion before recommending solutions -- no guesswork, just precision.

NYC DOB Licensed & Insured

Fully licensed by the NYC Department of Buildings with comprehensive liability and workers' compensation coverage for complete peace of mind.

Long-Term Warranties

We back every waterproofing project with robust labor and material warranties because we use premium products and proven installation methods.

Emergency Response Available

Water damage doesn't wait, and neither do we. Our team is available for emergency waterproofing situations to minimize damage to your property.

Our Process

A systematic approach to keeping your property dry.

01

Contact Us

Reach out by phone or form. Describe the water issue and we'll schedule a convenient time for an on-site assessment.

02

Inspect & Diagnose

Our waterproofing specialists conduct a thorough inspection, identify the source of moisture, and provide a detailed remediation plan.

03

Execute the Work

Our experienced crews begin work using industry-leading materials and techniques. Your project manager keeps you updated at every stage.

04

Verify & Guarantee

We test and verify all waterproofing installations, conduct a final walkthrough, and provide warranty documentation for your records.

Frequently Asked Questions

How do I know if my building needs waterproofing?

Common signs include water stains on basement walls or floors, musty odors, peeling paint, efflorescence (white mineral deposits), visible cracks in the foundation, and pooling water after rain. If you notice any of these, contact us for a free inspection before the damage gets worse.

What is the difference between interior and exterior waterproofing?

Exterior waterproofing involves applying membranes and drainage systems on the outside of your foundation to prevent water from ever reaching the walls. Interior waterproofing manages water that has already entered using sump pumps, French drains, and sealants. We often recommend a combination of both for maximum protection.

How long does basement waterproofing take?

Interior basement waterproofing typically takes 2 to 4 days depending on the size and severity of the issue. Exterior waterproofing can take 5 to 10 days due to excavation requirements. We provide a detailed timeline during your free estimate so you know exactly what to expect.

Will waterproofing fix my mold problem?

Waterproofing eliminates the moisture source that mold needs to grow, which is the critical first step. However, existing mold may need to be professionally remediated before waterproofing begins. We can coordinate mold remediation as part of your project to ensure a complete solution.

How much does waterproofing cost in NYC?

Waterproofing costs vary based on the type of system needed, the size of the area, accessibility, and the severity of the water problem. Interior solutions tend to be more affordable than exterior ones. We provide free, transparent estimates with no hidden fees. Call us at 718-853-9708 for a personalized quote.

Don't Let Water Damage Your Investment

Get a free waterproofing assessment from NYC's trusted experts. No obligation, no pressure.

718-853-9708
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