About Down Under Waterproofing
Down Under Waterproofing, doing business as Down Under Waterproofing and Foundation Repair, provides basement waterproofing, foundation repair, crawl space encapsulation, masonry repair, structural stabilization, and related moisture-control services designed for real local conditions throughout New Jersey and Eastern Pennsylvania.
From wet basements and wall seepage to bowed walls, underpinning, and drainage correction, our work is focused on long-term solutions that protect the structure, improve usability, and give homeowners confidence in the condition of their home.
Built on Experience, Local Knowledge & Long-Term Solutions
Founded in 2006, Down Under Waterproofing has built its reputation by helping homeowners address serious basement moisture issues, structural concerns, and waterproofing failures with clear recommendations and durable repair strategies. The company is led by Walter Gural and focuses on solving the underlying cause of the problem instead of offering quick cosmetic fixes.
Homes across New Jersey and Eastern Pennsylvania face recurring issues tied to groundwater pressure, drainage patterns, settling soils, seasonal moisture changes, and aging foundation materials. Our work is designed around those realities, which is why every recommendation starts with evaluating what is happening at the home, where the stress or water is coming from, and what solution will protect the property long-term.
We work with homeowners who want more than a patch. They want to understand the problem, see the right options, and choose a repair plan that supports the structure and reduces the chance of repeated issues down the road.
What matters to us
- Clear diagnosis before recommending repairs
- Systems and materials chosen for real field conditions
- Respect for the home, schedule, and long-term value of the property
- Solutions that support waterproofing, structure, and resale confidence
Why Homeowners Choose Down Under Waterproofing
Since 2006
We have been serving homeowners across New Jersey and Eastern Pennsylvania for nearly two decades with waterproofing and structural repair services tailored to local conditions.
Specialized Services
Our work includes basement waterproofing, foundation repair, crawl space encapsulation, above-grade waterproofing, masonry repair, underpinning, and drainage-related correction.
Local Knowledge
We understand how groundwater pressure, seasonal rain, drainage patterns, and soil movement affect homes in New Jersey and Eastern Pennsylvania, which leads to more practical repair recommendations.
Trusted Systems
We work with trusted materials and systems, including Tremco waterproofing components, Rhino Carbon Fiber reinforcement systems, Ram Jack structural solutions, Liberty Sump Pumps, and other repair methods selected for real jobsite conditions.
Licensing & Professional Standards
NJ License #: 13VH03267600
PA License #: PA175894
We emphasize professional evaluation, clear recommendations, and work aligned with long-term structural and moisture-control needs.
Transferable Warranty Protection
Qualifying waterproofing systems may include a lifetime transferable warranty, provided installed equipment and systems are not tampered with after installation.
Honest, Transparent Solutions
We take the time to understand your needs and recommend realistic, cost-effective solutions based on years of hands-on experience. No unnecessary work, no pressure, and no guesswork—just honest advice and professional service.
Technical Expertise & Training
Our team is trained around trusted systems and products associated with Liberty Sump Pumps, Tremco Drainage Board, Rhino Carbon Fiber Systems, and Ram Jack structural solutions. We focus on proven materials backed by strong manufacturer support and practical field performance.
Compliance & Professional Standards
We take code compliance seriously. Structural repair work is completed with the appropriate permits and, where required, coordinated with licensed engineering and local requirements. We work closely with applicable codes, specifications, and municipal expectations to help ensure the job is done the right way.
Fully Licensed, Insured & Bonded
NJ License #: 13VH03267600
PA License #: PA175894
Bonding #: 72695582
We maintain appropriate business standards, insurance expectations, and bonding aligned with home improvement requirements.
Proven Track Record
We are proud of the positive feedback and repeat trust we have earned from homeowners and property owners throughout the region. Our reputation is built on reliability, workmanship, and long-term results.
What Makes Our Approach Different
We do not treat waterproofing and structural repair as isolated problems. Many homes deal with a combination of water pressure, drainage failure, settlement, wall movement, crack development, or moisture migration that affects multiple parts of the property at once. That is why our evaluations look at the whole condition of the home rather than just the most visible symptom.
Our process focuses on:
- Finding the source of water entry or structural movement
- Distinguishing between cosmetic symptoms and real repair needs
- Recommending systems that fit the actual condition of the home
- Explaining solutions clearly so homeowners can make informed decisions
Homeowner priorities we help protect
- Structural integrity
- Finished basement usability
- Indoor air quality and moisture control
- Property value and long-term confidence
Our Core Services
Basement Waterproofing
Solutions for wet basements, wall seepage, floor leaks, hydrostatic pressure, and long-term moisture control.
Explore Basement Waterproofing →Foundation Repair
Repair strategies for bowed walls, cracks, movement, underpinning, and structural stabilization needs.
Explore Foundation Repair →Crawl Space Encapsulation
Moisture control and protection for crawl spaces affecting indoor air quality and lower-level dampness.
Explore Crawl Space Encapsulation →Above-Grade Waterproofing
Protection for building-envelope issues where moisture is affecting above-grade areas of the structure.
See Above-Grade Waterproofing →Masonry Repair
Repair work for mortar, stone, brick, and related areas impacted by moisture, age, or structural stress.
View Masonry Repair Services →Construction Restoration
Related repair support for areas damaged by moisture intrusion, repeated leaks, or structural wear.
Review Restoration Services →Recognition, Systems & Trusted Materials
Neighborhood Fave Recognition
Down Under Waterproofing was voted a Nextdoor Neighborhood Fave in 2023, 2024, and 2025, reflecting consistent trust from homeowners in the communities we serve.
2025 Princeton Recognition
We were recognized among the best foundation repair companies in Princeton, New Jersey for 2025, reinforcing the quality of our foundation repair work and customer service in the region.
Trusted Product Alignment
Relevant projects may incorporate products or systems associated with Tremco waterproofing, Rhino Carbon Fiber reinforcement, Ram Jack structural systems, Liberty Sump Pumps, and other established repair approaches already used in the field.
Service Area
Down Under Waterproofing serves homeowners throughout New Jersey and Eastern Pennsylvania, with a strong footprint across Mercer, Monmouth, Middlesex, Somerset, Hunterdon, Morris, and Ocean counties, as well as Bucks and Montgomery counties in Pennsylvania. Our broader site structure supports these areas through dedicated county and town pages.
Mercer County NJ | Monmouth County NJ | Middlesex County NJ | Somerset County NJ | Hunterdon County NJ | Morris County NJ | Ocean County NJ | Bucks County PA | Montgomery County PA
Frequently Asked Questions — About Our Company
Talk With Down Under Waterproofing
If you are dealing with a wet basement, drainage problems, wall movement, foundation cracks, crawl space moisture, or related structural concerns, we can help you evaluate the condition and understand the right next step.
Serving NJ & Eastern PA since 2006 | NJ #13VH03267600 | PA #PA175894 | Monday through Saturday, 7:00 AM to 7:00 PM
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Testimonials
Testimonials
"The estimate was for thousands of dollars less than other Waterproofers. There was one company who was less - he refused to do the job as the basement was small, and the home older so the basement will never be a finished basement. Down Under was easy to arrange financing through Chase. The worker arrived as scheduled. There was a problem with my sewer pipe and the company worked about my need to schedule a plumber and worked about his schedule. Then they returned to set up the washer and dryer after the cement cured. They job was completed as quickly as possible considering my sewer pipe situation."
Sam & Sandy
Testimonials
Testimonials
" Walt was a great guy. He came in and worked with us on the windows we wanted replaced. He also gave us good counsel when we were thinking about not doing the bathroom area. When the team finished he made sure they came back to reconnect the washer and dryer for me and stop up an open pipe to prevent water from sneaking in. The job took down our finished basement but there is no more odor when it rains! I check everytime."
Robert & Julie
Testimonials
Testimonials
I contracted Down Under Waterproofing to reinforce my foundation using carbon fiber. I researched, did my homework, and contacted two manufacturers, one being Fortress Stabilization. They sent Down Under Waterproofing's information. Walter represented the company, came to our house, gave us an estimate, had an engineer write up drawings, picked up the permit, and had the whole basement done in two days. The turn around time was two weeks between initial consultation and completion. It relieved us greatly because this was a real estate transaction.
D.F. Manasquan, NJ
