Down Under Waterproofing and Foundation Repair has a proud history and reputation of being reliable, trustworthy, and of performing consistently well. Read our testimonials or ask for references attesting to our reliability.

On-Time Performance

On-Time Performance

Down Under Waterproofing and Foundation Repair is known for completing all projects within quoted time frames and punctual appointments - we won't leave you hanging and waiting.


Latest Technology

Down Under Waterproofing and Foundation Repair always employs the latest technology available to insure all projects are performed and completed in the most efficient, dependable and durable manner.

About Us We are a leading basement contractor in New Jersey and Eastern Pennsylvania

Welcome to Down Under Waterproofing of NJ and Eastern Pennsylvania. Since 2006 we have been providing waterproofing (from French drains to parking decks and everything in between), foundation repair, replacing foundations,masonry and construction restoration services. As a fully qualified waterproofing contractor with over 2000 satisfied customers we enjoy an excellent reputation and employ only the most effective and widely accepted methods from both engineers and architects in the industry.

At Down Under Waterproofing there is no high pressure selling to get your business. We tell it the way it is and we guide you through the steps in order to move forward. Down Under Waterproofing prefers to rely on our reputation and also backing it up by doing the job right. Trust us, we have been there, done that.... We are here to fix things, not patch things.

Our Services - Quality Services

Basement Waterproofing

French drains, sump pumps, crack repairs, moisture control-sealing/painting

Foundation/Structural Repair

Bowing walls, failed footings, underpinning, brick repairs, replacing foundation walls, basement dig outs (lowering floors).

Construction Restoration

Replace sill plate, level sagging floors, termite damage, rotted wood, replace columns, support beams/girders, joists

Above Grade Waterproofing

Building envelope, caulking, waterproofing coatings, flashing

Crawl Space Encapsulation

Dirt crawl spaces are great places for insects, mold, and mildew to live, thrive and reproduce.

Doors - Windows

Bilco doors,egress windows


Traditional and eifs-repair, install, replace

Retaining Walls

Repair, rebuild or install new

Masonry Repair

All types of brick work, repointing or tuck pointing brick, build/replace steps, block work, chimney repair.

Your Trusted Construction & Building Partner

It is our commitment to serve as your Trusted Building Partner to deliver your project on time and on budget driven by Safety, Quality and a relentless pursuit toward Customer Satisfaction.



Year of experience



Successful Projects



Satisfied Customers



Money Customers Saved

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Down Under Waterproofing & Foundation Repair maintains an A+ rating with the Better Business Bureau
The musty smell is probably from your basement and it is much more than just a bad smell. Most musty odors are caused by moisture - it could be mold and solving a moisture problem will usually solve the odor problem.
A crack in a foundation wall is a sign of movement. Cracks in your walls can be caused by several factors. Cracks could be a sign of settling or shifting of the foundation or by pressure built up around and/or under your foundation.
Yes. A finished basement opens up space and adds significant value to your home. According to Remodeling Magazine, the average homeowner recouped 70% of the cost of their basement remodel upon selling their home.

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