NYC DCA 2006980-DCA · EPA NAT-F215455-1
Foundation Waterproofing Services in NYC
Interior and exterior foundation waterproofing plus French drain installation, stopping leaks, cracks, and structural damage across Manhattan, Brooklyn, Queens, the Bronx & Staten Island.
—Brooklyn's Trusted Waterproofing Contractor
Foundation Waterproofing Built to Keep Properties Strong
Hi Tech Contracting & Restoration Corp is your reliable foundation waterproofing contractor in NYC. Our skilled team protects homes and businesses from leaks, foundation cracks, and water damage using proven waterproofing methods and high-quality materials.
We proudly serve Brooklyn, Queens, Manhattan, Staten Island, the Bronx, and nearby areas. Keep your property strong and dry — contact us today.
718-510-6000
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—Our Foundation Waterproofing Services
Foundation Waterproofing Services We Provide
Three solutions that protect a foundation from every direction water can reach it — from inside the wall to the soil surrounding it.
Interior Foundation Waterproofing
Premium sealants, vapor barriers, and drainage systems that stop leaks and control moisture inside basement walls and floors.
Exterior Foundation Waterproofing
Excavation, waterproof coatings, and protective membranes and drains that stop water before it reaches the home.
French Drain Installation
Durable drainage pipes that collect and redirect groundwater away from the property, reducing hydrostatic pressure and leaks.
— A Closer Look
Strong Foundations Start With the Right System
Two ways we protect a foundation, and how each one works.
—Interior System
Interior Foundation Waterproofing
Our interior foundation waterproofing solutions are designed to stop leaks and control moisture inside your property. We use premium sealants, vapor barriers, and drainage systems to prevent water from entering basement walls or floors — protecting the foundation while helping maintain a clean, dry, and healthy indoor environment.
—Exterior System
Exterior Foundation Waterproofing
We provide exterior foundation waterproofing that stops water before it reaches your home. Our team excavates around the foundation, applies waterproof coatings, and installs protective membranes and drains — creating a strong barrier against moisture that prevents cracks, leaks, and soil pressure damage for long-lasting structural stability.
—Related Services
Need Waterproofing Somewhere Else?
Foundation waterproofing protects below-grade walls — see our other waterproofing services.
Basement Waterproofing
Interior and exterior systems, plus crawl space encapsulation, to keep basements dry.
Exterior Waterproofing
Membranes and coatings for foundations, brick walls, balconies, and windows.
Roof Waterproofing
Membranes and coatings that stop leaks at the roof deck before they reach the interior.
— Why Choose Us
Why Choose HTCR for Foundation Waterproofing
A foundation stays dry when the drainage, the membrane, and the grading are all working together — not just one of the three.
Interior & Exterior Expertise
We diagnose the water source and recommend the right system for the property.
Full Lifecycle Support
Inspection, waterproofing, drainage, and repair handled by the same crew over time.
Licensed & Insured
NYC DCA licensed and EPA certified, protecting your property on every job.
24/7 Emergency Response
Active leaks and flooding handled on a priority basis to limit damage fast.
15+ Years Experience
A proven track record across Manhattan, Brooklyn, Queens, the Bronx & Staten Island.
Detailed Estimates
Free inspection with a written, itemized quote before any work begins.
— Our Process
From Inspection to a Dry Foundation
Five stages, always in this order — the drainage plan is what determines whether the fix lasts.
Inspection
We assess the foundation and grading to find where water is getting in.
Written Estimate
An itemized, no-obligation written project quote — usually same week.
Excavation or Prep
Exterior soil excavated or interior walls prepared.
Seal & Drain
Membranes, coatings, or French drains professionally installed for a watertight result.
Final Walkthrough
Inspection and sign-off so you see the results before we call it done.
— Questions
Frequently Asked Questions — Foundation Waterproofing NYC
Foundation waterproofing is a set of interior and exterior methods used to keep water out of a building’s foundation walls and floors. It combines sealants, drainage systems, membranes, and grading to stop leaks, cracking, and long-term structural damage caused by groundwater and soil pressure.
Exterior foundation waterproofing typically involves excavating around the foundation, applying a waterproof coating or membrane directly to the wall, and installing a drainage system before backfilling. It creates a barrier at the source of the water, which makes it more effective long-term than interior fixes alone, though it’s more invasive to install.
A French drain is a trench filled with gravel and a perforated pipe that collects groundwater and redirects it away from the foundation before it can build up pressure against the wall. It’s one of the most effective ways to relieve hydrostatic pressure and prevent basement leaks over time.
Exterior waterproofing stops water at the source and offers the longest-lasting protection, while interior waterproofing manages water that’s already gotten in and is faster and less disruptive to install. The right choice depends on the severity of the leak, the age of the foundation, and whether excavation is practical for the property.
Foundation cracks are commonly caused by soil settling, hydrostatic pressure from poor drainage, freeze-thaw cycles, and natural concrete curing. Not every crack is a structural emergency, but any crack that’s leaking, widening, or running horizontally should be inspected and repaired before it worsens.