Waterproofing in Park Slope, Brooklyn — Bobby Contracts Inc

Park Slope’s brownstones sit on foundations that are well over a century old in many cases, and that means basements here deal with water problems that newer construction simply doesn’t face. Bobby Contracts Inc. provides waterproofing in Park Slope for homeowners dealing with damp basements, seepage after storms, or foundations that were never properly sealed to begin with.

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About Us

Basement Waterproofing in Park Slope

Basement waterproofing in Park Slope is one of the services we get called about most, especially after a heavy rain leaves a basement floor wet or a musty smell that won’t go away. Common issues we address include:

Water seeping through foundation walls or the slab
Damp or musty basements, especially after rain
Visible cracks in foundation walls letting moisture in
Efflorescence (white mineral buildup) on basement walls
Standing water or persistent dampness near the foundation perimeter

We assess whether the issue is coming from the exterior grading, foundation cracks, poor drainage, or a combination, and recommend a solution based on what’s actually causing the problem — not a generic fix.

Foundation Waterproofing for Brownstones

Many Park Slope brownstones have original stone or masonry foundations that were never built with modern waterproofing membranes. Over decades, these foundations can develop hairline cracks or simply become porous enough to let moisture through, especially during heavy rain or snowmelt. Our foundation waterproofing work addresses this at the source — sealing the foundation from the outside where possible, or applying interior systems when exterior access isn’t practical for a rowhouse.

Interior & Exterior Waterproofing Systems

Depending on your basement’s condition and your property’s layout, we install:

Interior drainage systems — channeling water away from the foundation and toward a sump pump before it can pool inside
Sump pump installation — removing water that does make it into the basement, preventing standing water and flooding
Exterior waterproofing membranes — sealing foundation walls from the outside, ideal for buildings with accessible yard or areaway space
French drains — redirecting groundwater away from the foundation before it becomes a problem

Signs You Need Waterproofing

If you’re noticing any of the following in your Park Slope home, it’s worth having your basement assessed:

A musty smell that persists regardless of ventilation
Peeling paint or white, chalky residue on basement walls
Visible cracks in the foundation, especially ones that seem to be widening
Water stains on walls or floors after rain
Mold or mildew growth in basement corners

Left unaddressed, these issues tend to get worse — and more expensive to fix — over time.

Our Waterproofing Process

Inspection

We assess your basement, foundation walls, exterior grading, and drainage patterns to identify exactly where water is getting in.

Written Estimate

You’ll get a clear, itemized breakdown of the recommended solution, materials, and cost — no vague verbal pricing.

Customized Plan

Whether it’s interior drainage, exterior sealing, a sump pump, or a combination, we build a plan around what your specific foundation needs.

The Work Itself

Our crews complete the waterproofing work using proven materials and methods, with minimal disruption to your home.

Final Walkthrough

We confirm the work meets our standards and yours before considering the job complete.

Why Park Slope Homeowners Choose Us for Waterproofing

Licensed & insured for all waterproofing and foundation work
Written, itemized estimates — no surprises after the work begins
Experience with brownstone and pre-war foundations specific to Park Slope
Warrantied work, because a waterproofing system should last for years, not one season
Honest assessments — we won’t recommend exterior excavation if an interior system will solve the problem just as effectively

Frequently Asked Questions

Do you offer free estimates for basement waterproofing in Park Slope?

Yes. We inspect your basement and foundation for free, then provide a written, itemized estimate at no cost and no obligation.

How do I know if I need interior or exterior waterproofing?

It depends on your foundation’s condition, your property’s layout, and whether there’s accessible exterior space to work with. We’ll walk you through the tradeoffs during your inspection and recommend what actually fits your home.

Is basement waterproofing necessary for brownstones specifically?

Many Park Slope brownstones have original masonry foundations that were never built with modern waterproofing in mind, which makes them more prone to seepage and dampness than newer construction. Waterproofing addresses this at the source.

Do you install sump pumps as part of waterproofing?

Yes, sump pump installation is often part of an interior drainage solution, especially for basements that experience recurring water intrusion.

How long does a basement waterproofing project typically take?

It depends on the scope — interior drainage systems can often be completed in a few days, while exterior waterproofing may take longer depending on excavation needs. We’ll give you a realistic timeline during your estimate.