Long Island's

Foundation Repair & Waterproofing Experts

Permanent Foundation Repair Starts Here.

Get Your Free Estimate
Our Services
Free
Estimates
Lifetime
Warranties
5 Star
Rated
The Foundation Crack Repair LLC team and branded truck on Long Island
The Team

Meet the People Behind Long Island's most trusted foundation work.

Locally Owned. In-House Crews. No Subcontractors.
From your initial consultation to the final walkthrough, you’ll deal with the same trusted team every step of the way.

Licensed & Insured
BBB A+ Rated
Certified RamJack Installer
Neptune WetSuit™ Certified
What We Do

Our Services Permanent solutions for every foundation problem.

Foundation repair — helical piles, push piers, crack repair, and bowing wall reinforcement
01

Foundation Repair

Cracks, settlement, bowing walls. Helical piles, push piers, carbon fiber reinforcement, high-pressure injection — everything that keeps your home standing straight.

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Basement waterproofing — French drains, sump pumps, exterior + interior systems, crystalline waterproofing
02

Basement Waterproofing

French drains, sump pumps, interior & exterior systems, crack injection, and crystalline waterproofing for efflorescence. Diagnosed first, fixed permanently.

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Crawl space repair and encapsulation — structural reinforcement plus 80 mil vapor barrier
03

Crawl Space Repair

Complete crawl space repair and encapsulation — structural reinforcement, moisture control, mold remediation, and our 80 mil liner. Fix the root problem, permanently.

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Concrete slab lifting with polyfoam injection for driveways and slabs
04

Concrete Lifting

Polyurethane foam injection to level sunken slabs, driveways, stoops, pool decks, and warehouse floors — no demolition, no replacement needed.

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Builders & Developers

New Construction & Commercial Lifetime warrantied foundation waterproofing & new construction helical piles

Certified Ramjack Installer

Engineered deep foundation support for new builds and commercial structures. Load-tested, code-compliant, and installed with minimal site disturbance.

  • Engineered to spec per project
  • Installed in any weather, year-round
  • No curing time — build on them immediately
  • Certifield RamJack Installer
Get a Commercial Quote
Neptune WetSuit™ — Lifetime Warranty

New Construction WaterproofinG

Upgrade from outdated dampproofing to Wet Suit™ by Neptune Coatings — a high-performance, spray-applied waterproofing system that cures in seconds with over 2100% elongation. True waterproofing, not moisture resistance.

  • Instant-set: any thickness in a single pass
  • Seamless — no joints, no failure points
  • Transferable lifetime warranty: material & labor
  • Unlimited free service
Learn About Wet Suit™
Foundation Crack Repair crew working together on a Long Island foundation projectClose-up of precision foundation repair work
Locally Owned
Why Choose Us

We Don't Cut
Corners We fix them. Here's what sets us apart.

01

Licensed & Fully Insured

Full liability coverage and worker's comp on every project, protecting you and your property.

02

In-House Crew, No Subs

Our trained team handles every project from start to finish. No subcontractors, no surprises.

03

Upfront, Honest Pricing

Detailed written estimates with no hidden fees. Know exactly what you're paying before work begins.

04

Warranty-Backed Work

Every repair backed by warranty. We use proven methods and professional-grade materials that last.

1000+
Foundations Repaired
4.9
Google Rating
100%
Satisfaction guarantee
Local
LI Experts
How It Works

Our Process From inspection to permanent fix, in four steps.

01

Free Inspection

We assess your foundation, identify every issue, and explain what's happening in plain English.

02

Detailed Estimate

A clear, written proposal with transparent pricing. No pressure, no hidden costs.

03

Expert Repair

Our in-house crew completes the work using proven methods and professional-grade materials.

04

Final Walkthrough

We review every detail with you, clean up completely, and hand over your warranty documentation.

Reviews

What Homeowners Say Real reviews from real Long Island neighbors.

★★★★★

"They found cracks in our basement that two other companies missed. Fixed everything in one day. Professional, clean, and honest."

Michael R.
Babylon, NY
★★★★★

"Our crawl space was a disaster. Moisture, sagging floors, the works. They encapsulated everything and our house feels completely different now."

Jennifer L.
Huntington, NY
★★★★★

"Fair price, showed up on time, and the waterproofing work is flawless. First heavy rain since the repair and our basement is bone dry."

David & Maria S.
Massapequa, NY

Small issues become big repairs Schedule your free inspection today.

Every day you wait, the problem gets worse. Get a clear plan to protect your home.

Call For Your Free Estimate
631-410-3388
FAQ

Common
Questions Everything you need to know before getting started.

How do I know if my foundation needs repair?
Look for cracks in walls or floors, doors and windows that stick, uneven floors, water seepage, and bowing walls. Catching problems early saves thousands — call us for a free inspection.
Costs depend on severity. Minor crack repairs start at a few hundred dollars; major structural work costs more. We provide free, detailed estimates with zero surprises.
Yes. Every project begins with a free on-site inspection and written estimate. No pressure, no obligation.
Most crack repairs are done in a single day. Larger projects take 2–5 days. We give you a clear timeline upfront.
All of Long Island including Nassau County, Suffolk County, Queens, and Brooklyn. From Montauk to Manhattan Beach.
Absolutely. All repair and waterproofing work is backed by a written warranty. We stand behind everything we do.
Where We Work

Serving Long Island From the North Shore to the South Shore.

Nassau County
Suffolk County
Queens
Brooklyn
Babylon
Huntington
Islip
Smithtown
Hempstead
Oyster Bay
Brookhaven
Massapequa
Levittown
Commack
Lindenhurst
Patchogue

Ready to Protect Your Home?

Free inspection. Honest estimate. No obligation.

Call 631-410-3388
Call Now — 631-410-3388