Brownstone Renovation
Full-scope restoration of NYC's historic brownstones. We rebuild facades, stoops, lintels, and cornices using period-appropriate materials and modern structural standards.
Waterproofing in Brooklyn & Across NYC
Service Overview
What Is Waterproofing?
Waterproofing is the work of stopping water from moving where it does not belong: through facades, through foundations, through parapets and roofs, into basements, behind walls. In NYC, water is the single most destructive force on a building. It accelerates everything else: mortar failure, wood rot, mold growth, structural settlement, insulation breakdown. Waterproofing is the broad category of work that addresses the entry points and the substrates. That can mean exterior sealants and coatings, repointing combined with a waterproofing membrane, foundation drainage installation, interior basement waterproofing, or any combination depending on where the water is coming from.
Why It Matters for NYC Buildings
Most homeowners do not call about waterproofing until they have an active leak, and by then the cost of fixing the damage is often higher than the cost of fixing the leak itself. Mold remediation, drywall replacement, flooring damage, and structural repair all compound fast. Waterproofing done proactively, especially on older NYC buildings, protects everything else. It also matters at sale time: buyers' inspectors find leak history quickly, and water damage is one of the most common reasons deals fall apart at the closing table.
Key Industry Terms
- Negative-Side Waterproofing
- Treating the inside surface of a wall to block water that is already coming through. Common in basements.
- Positive-Side Waterproofing
- Treating the outside surface of a wall to stop water before it enters. The preferred long-term solution.
- Capillary Action
- How water travels upward through porous masonry. The reason "ground water" can show up on a wall three feet up.
- Hydrostatic Pressure
- Water pressure pushing against a foundation from saturated soil. Can force water through small cracks.
- Membrane
- A flexible waterproof layer applied to a wall or roof surface, often used on foundations and flat roofs.
- Drainage Mat / French Drain
- Systems that move water away from a foundation before it has a chance to soak in.
Warning Signs
Signs You Need Waterproofing
Don't wait for a minor issue to become a major expense. These are the most common warning signs NYC property owners overlook.
Damp or musty basement smell
A persistent musty odor usually means moisture is sitting somewhere it should not be.
Efflorescence on basement or facade walls
That white chalky residue is salt left behind by water moving through masonry.
Bubbled paint or peeling plaster on exterior walls
A common indicator of moisture pushing from outside in.
Visible mold or mildew
Especially in corners, behind furniture, or near floor-wall joints.
Cracks in foundation walls
Any crack in a foundation is worth assessing. Wider cracks combined with staining are urgent.
Pooling water in the yard or near the foundation
If water sits next to your building after rain, it is finding a way in.
Spalling brick or stone, especially at the base of the building
A common sign that water is wicking up from grade level and freezing inside the masonry.
Why Choose Us
Why Choose H. Enayet for Waterproofing?
Qualified contractors are common. Specialists who know NYC buildings, materials, and code and stand behind the work are not.
Condition-Specific System Selection
We assess actual hydrostatic conditions and substrate type before specifying any system. No standard packages — the right solution depends on your site's drainage reality, access constraints, and water table behavior.
Interior & Exterior Solutions
When excavation isn't practical, we install interior cavity drainage with crystalline systems that perform under sustained hydrostatic pressure. You're not forced into one approach based on what a contractor prefers to install.
Integrated Drainage & Sump Systems
A waterproofing membrane is only as reliable as the drainage system relieving pressure behind it. We design and install perimeter drains and sump pump systems as part of every below-grade scope.
Free Estimates · All Five Boroughs
Ready to Start Your Project?
Get a free, no-obligation estimate within 24 hours. Reach out by phone, text, or form, whichever works best for you.
Everything We Do
Complete Construction & Restoration Services
We handle exterior, structural, and finish work across NYC's most demanding building types. Every job runs through our own licensed crews, never subcontracted out.
Learn more
Brick Pointing & Repointing
Removing failed mortar joints and replacing them with custom-matched mortar that restores weather protection and historic appearance. Done right, you can't tell we were there.
Masonry & Brickwork
Structural brick repair, parapet rebuilds, retaining walls, and feature work. Our crews handle single-brick replacements through full wall reconstructions on landmark and non-landmark properties.
Stucco Work
Three-coat traditional stucco, modern synthetic systems, crack remediation, and texture matching. We restore failing stucco facades without compromising the building's original character.
Waterproofing
Stopping water before it causes structural damage. Foundation waterproofing, exterior coatings, and chimney sealing built to handle NYC's freeze-thaw cycles year after year.
Limestone Renovation
Cleaning, patching, and replacement of limestone facades, lintels, sills, and decorative elements. Careful work that preserves the stone's original detail.
Also Available
Additional Services
Don't see what you're looking for? Reach out. We handle a wide range of construction and renovation work across NYC.
Where We Work
Proudly Serving All Five NYC Boroughs
Based in Brooklyn, we travel throughout New York City. Whether the job is big or small, give us a call and we'll come to you.
FAQ
Common Questions
Quick answers to what most NYC homeowners ask before hiring a contractor.
Don't see your question? Reach out directly.