Basement Waterproofing · Foundation Repair · Crawl Space & Drainage
New Jersey’s Basement Waterproofing Specialists
For over 20 years, homeowners across New Jersey have trusted the RDC team to keep basements dry. RDC Waterproofing installs engineered interior and exterior waterproofing systems, French drains, sump pumps, and foundation repairs — backed by a lifetime transferable dry-basement warranty in all 21 NJ counties.
- Free 7-day inspections
- Lifetime transferable warranty
- 1,000+ 5-star reviews
- We fix the source — no upselling
Quick answer
RDC Waterproofing is a New Jersey basement waterproofing and foundation repair company serving all 21 NJ counties from Berkeley Heights and Piscataway. We diagnose the true source of water intrusion, then install the right interior or exterior system — French drains, sump pumps, crack repair, or exterior membranes — backed by a lifetime transferable dry-basement warranty. Free inspections 7 days a week. Call (908) 569-1876.
Three problems New Jersey basements share
Wet basements, cracked foundations, damp crawl spaces — solved for good
Nearly every wet-basement call in New Jersey comes down to three things: where the water gets in, whether the foundation is failing, and how the air stays damp afterward. RDC Waterproofing is built around all three — interior & exterior waterproofing, foundation repair, and crawl space & humidity control — so one accountable team fixes the whole problem.
Basement waterproofing & drainage
Interior & exterior systems that stop water at the source
A wet basement is a plumbing-of-the-earth problem, not a mop problem. RDC traces exactly how water is getting in, then installs the system that stops it — so you’re not bailing out the same basement every spring.
- Diagnosed, not guessed: we trace whether water enters through hydrostatic pressure, wall cracks, the cove joint, or grading and downspouts.
- Interior perimeter systems: French drains channeled to a sump pump with battery backup, plus vapor barriers.
- Exterior systems: excavation, membrane and footing drains that stop water before it reaches the wall, plus yard drainage and grading.
- Built for New Jersey: engineered for our clay soils, high water tables, and heavy nor’easter and spring-thaw runoff.
Foundation repair & crack sealing
Cracked, bowing & leaking foundations, stabilized permanently
Water and pressure crack foundations — and a cracked foundation lets in more water. RDC seals the leak and, where the wall is moving, stabilizes it with proven structural methods, so the fix lasts.
- Crack repair that seals for good: polyurethane and epoxy injection for poured-concrete cracks that leak.
- Structural stabilization: carbon-fiber straps, wall anchors, and piers for bowing, cracked, or settling walls.
- Every foundation type: poured concrete, block, and stone foundations across NJ’s older housing stock.
- Egress & window wells: code-compliant egress windows and sealed window wells that stop a common leak point.
Crawl space & humidity control
Dry, sealed crawl spaces and healthy basement air
A damp crawl space or humid basement feeds mold, musty smells, and higher energy bills. RDC seals the space and controls the moisture so the air upstairs is healthier too.
- Full encapsulation: sealed vapor barrier, drainage, and dehumidification for a dry, usable crawl space.
- Humidity & mold control: energy-efficient dehumidifiers and mold prevention that keep the air healthy.
- Root-cause first: we correct the water source before we treat the air, so the problem doesn’t return.
- One accountable team: waterproofing, foundation, and air handled together — not three subcontractors pointing fingers.
Why homeowners choose RDC
A lifetime transferable dry-basement warranty
We stand behind the fix. Our interior waterproofing systems carry a lifetime transferable warranty — and it stays with the home when you sell it. See all our guarantees →
Lifetime transferable warranty
Our interior waterproofing systems are warrantied for the life of the structure — and the coverage transfers to the next owner.
Honest diagnosis, no upselling
We find and fix the true source of the water. If you don’t need a full system, we’ll tell you.
Fixed price & financing
Itemized, fixed-price quotes with no hidden fees — plus flexible financing on approved credit.
How RDC Waterproofing works
A proven process from free inspection to dry basement
The same disciplined workflow behind every waterproofing and foundation project across New Jersey.
Free inspection
We inspect inside and out, find where the water enters, and explain what we see — no pressure.
Diagnose the source
Hydrostatic pressure, cracks, cove joint, or grading? We identify the true cause, not the symptom.
Install the system
Our own crews install the right interior or exterior system, cleanly and on schedule.
Warranty & peace of mind
You get a written, lifetime transferable warranty and a basement that stays dry.
The full RDC Waterproofing service line
Everything we do to keep your home dry
One accountable New Jersey team for water, foundation, and air. See all services →
Why New Jersey chooses RDC Waterproofing
The waterproofing team homeowners actually trust
- 20+ years, 1,000+ 5-star reviews: the dedicated waterproofing division of the RDC brand New Jersey already knows.
- We fix the source: reviewers repeatedly note we declined to upsell and found the real problem — saving them thousands.
- Lifetime transferable warranty: coverage that stays with the home.
- Our own crews: no rotating subcontractors — trained RDC technicians on every job.
- Free inspections 7 days a week across all 21 New Jersey counties.
Led by founder Russell Calderone, the RDC team has kept New Jersey basements dry for over 20 years — known for diagnosing the true source of water rather than upselling. Meet the team →
Serving New Jersey from two hubs
Basement waterproofing in all 21 New Jersey counties
Two centrally located hubs dispatch our crews across the state. Tap your county to see how we keep basements dry there. See all service areas →
● Berkeley Heights Hub
Serving Northern New Jersey
● Piscataway Hub
Serving Central & Southern New Jersey
New Jersey waterproofing questions, answered
Frequently asked questions
How much does basement waterproofing cost in New Jersey?
It depends on the cause and the system. A single leaking crack sealed with injection is a few hundred dollars; a full interior French drain with a sump pump and battery backup for an average NJ basement typically runs several thousand. RDC gives a fixed, itemized quote after a free inspection — and we only recommend the system you actually need. Call (908) 569-1876.
What causes a wet basement, and can waterproofing really stop it?
Most New Jersey basements leak from hydrostatic pressure, foundation cracks, cove-joint seepage, or poor exterior grading and downspouts. Yes — once we diagnose the exact source, the right interior or exterior system stops it for good. See basement waterproofing.
Interior French drain or exterior waterproofing — which do I need?
Interior perimeter drainage to a sump is the most cost-effective, reliable fix for most NJ homes. Exterior waterproofing (excavation and membrane) is warranted when the wall itself is failing or water must be stopped before it reaches the foundation. We recommend based on your home, not a sales script. Compare interior drainage and exterior waterproofing.
Do you offer a warranty?
Yes. Our interior waterproofing systems carry a lifetime transferable dry-basement warranty — it covers the system for the life of the structure and transfers to the new owner if you sell.
Which New Jersey areas do you serve?
All 21 New Jersey counties, from two hubs in Berkeley Heights (northern NJ) and Piscataway (central and southern NJ). Find your county on our service areas page.
Is the inspection really free?
Yes. We inspect your basement inside and out, diagnose the source of the water, and give you a written, fixed-price quote at no cost — 7 days a week, with no pressure.
Trusted across New Jersey
1,000+ five-star reviews
New Jersey homeowners rate the RDC team five stars — again and again for honest diagnosis, clean installs, and basements that stay dry. When water gets in, they call RDC.
4.9 average · 1,000+ reviews · BBB A-Rated