Mercer County · New Jersey
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Basement Waterproofing in Lawrenceville, NJ

A musty smell often shows up before standing water does. A. Pennacchi & Sons finds where it is coming from and proposes the repair that stops it.

1947Founded4Generations(609) 394-7354NJ Office
Basement Waterproofing in Lawrenceville, NJ

Trace The Moisture Before Choosing A Fix

Many Lawrenceville homeowners notice a basement problem by smell before they ever see water: a damp corner, a stain along the bottom of the wall, a dehumidifier that never stops running. A. Pennacchi & Sons traces that moisture back to where it enters the foundation before proposing a fix.

The company has worked in Mercer County since 1947, and its institutional record in Lawrence Township includes the Lawrenceville School and the Lawrence school district. We serve Lawrenceville and the 08648 area from our shop in Hamilton. Call (609) 394-7354.

You can also request an estimate online.

Signs Worth A Call

  • Water on the floor after heavy rain or snowmelt.
  • A white, chalky crust on the foundation wall.
  • Paint peeling at the bottom of the wall.
  • A musty smell that comes back after you air the basement out.
  • Damp along the joint where the wall meets the floor.

None of these tells you on its own where the water is coming in. That is the job of the inspection, and it decides whether the fix is a single crack repair or a drainage system.

Waterproofing Options For Lawrenceville Homes

There is no single system we install in every basement. The repair depends on how the water is getting in.

Foundation wall dug out and sealed from the outside

Interior French Drain And Sump

A drain along the inside of the basement walls collects water and moves it to a sump pump.

Exterior Waterproofing

Digging along the outside of the foundation lets the wall be sealed and drained from the outside.

Crack And Joint Sealing

Foundation cracks, gaps around pipes, and the seam where the wall meets the floor are sealed where water is coming through.

Masonry And Concrete Repair

If the wall is deteriorating, it is repaired as part of the same project.

For commercial and multi-unit buildings, we also offer below and above grade waterproofing for foundations, terraces and parking decks. When the walls themselves need work, see our interior and exterior restoration services.

What Changes The Price

Paul came up with an effective and cost-effective solution for us.

Katia Ten Eyck, Google review (basement waterproofing)

The entry point, the foundation material, the access around the house, and whether the job needs work outside, inside or both. Older foundations sometimes need masonry or concrete repair before any waterproofing will hold. The written proposal lists the scope and a single total once we have seen the basement.

From First Call To Finished Basement

  1. Step 01

    Describe The Problem

    Call (609) 394-7354 or use the estimate form. Photos of the stain or the wet area help.

  2. Step 02

    Inspection

    We check the basement walls and floor, then the outside of the foundation, to trace the water to its source.

  3. Step 03

    Proposal

    A written scope with one total, for you to review.

  4. Step 04

    Installation

    Our crew completes the approved work.

See our detailed basement waterproofing process.

Credentials

  • Established 1947, four generations of the Pennacchi family.
  • NJ Home Improvement Contractor registration #13VH01138400.
  • Licensed, insured and bonded.
  • 4.5 stars across 30 Google reviews.

Read all our reviews on Google. More customers describe their jobs on our testimonials page. Photos of finished work are in our project gallery.

Learn more about us and our four generations in the trade.

Other Services From A. Pennacchi & Sons

Besides this work, A. Pennacchi & Sons handles:

Nearby Mercer County Pages

Related pages nearby:

Frequently Asked Questions

Is A Dehumidifier Enough For A Damp Basement?
A dehumidifier lowers humidity in the air. It does nothing about water coming through the wall or floor. If the dampness returns after rain, water is entering, and the entry point needs to be found and closed.
Is A Sump Pump Enough To Keep My Basement Dry?
A sump pump only removes water that reaches it. Many basements that need one also need drainage that guides water to the pit, or a repair outside that keeps water off the wall.
Should I Waterproof From The Inside Or The Outside?
It depends on where the water enters and what is around the house. Exterior work keeps water off the wall. Interior drainage collects water that has already come through and carries it to a sump pump. A. Pennacchi & Sons recommends one, the other or both after seeing the basement and the outside of the foundation.
Do You Work On Basements In Older Lawrenceville Homes?
Yes. Older foundations built from stone or block need a different approach than poured concrete, and A. Pennacchi & Sons repairs the masonry as well as waterproofing it.
What Our Clients Say

A Reputation Built On Referrals.

5.0
Countless Google Reviews
MA

Michael Atkin

8 reviews

10 Months Ago

“Knowledgeable, professional, reliable. Sent 6 masons to get the waterproofing job done quickly. Highly recommended. Has the knowhow to get the job done right the first time. A trustworthy expert firm.”

Basement Waterproofing
LH

Lauren Hilton

1 review · 1 photo

A Year Ago

“I had a roofer come out for a small leak in my attic. He fixed it and while up on the roof took pictures of my chimney. Told me I had a big problem. Lot of mortar missing. I called A. Pennacchi & Sons. Paul came out the next day. He told me what needed to be done and gave me a price. I asked him if I should add a few bricks to the top. He said "why do you want to spend more money?" What contractor says that? The men came out a few days later. On time, polite, got right to work, and cleaned up like they were never there. Paul had given me a choice of colors. His price was the best one. My chimney now looks absolutely beautiful. I would give them 10 stars.”

Chimney Repoint
RT

Rich Treichler

11 reviews

A Year Ago

“Great experience with Paul and the Pennacchi team. We contracted this firm to waterproof our basement and replace our basement windows. Nick was excellent at coordinating the effort, including preparation, window replacement, waterproofing, clean up, and follow up to inquire about and resolve a few questions. Happy to recommend Pennacchi and Sons.”

Basement Waterproofing
BG

Brenda Giannacio

1 review

A Year Ago

“A. Pennacchi & Sons has offered outstanding service since our first meeting. Honest, reliable, knowledgeable, and very responsive. The staff take pride in their work and are very respectful of your home. We highly recommend using them if you are having issues with a wet basement. We cannot thank them enough.”

Basement Waterproofing
JA

Jackson Adolph

2 reviews

A Year Ago

“Pennacchi sealed our basement 2 years ago. After a recent heavy rain we noticed seepage and asked Pennacchi to look at it. They sent Nick, who did an excellent job diagnosing the problem, finding the most likely seepage site, and then repairing it. Nick came by the next day, inspected the repair, and also improved sealing of 2 utility pipe entries. The rapid response, competency, diligence, and follow-up were excellent.”

Basement Waterproofing Repair
MA

Mmm Aaa

Local Guide · 19 reviews · 24 photos

2 Years Ago

“We are so impressed with Pennacchi & Sons. Multiple people recommended this company as the best in the region. For a company with a huge legacy, working throughout the county, there was no hesitation to see what our small job looked like and whether they could help. The crew was friendly, timely, and efficient. Ray walked us through the process, gave us a play-by-play for the best understanding of the work, and answered tons of questions. The end result was better than the original.”

Masonry Restoration
MS

Michael Su

Local Guide · 11 reviews · 1 photo

2 Years Ago

“Pennacchi has an exceptional reputation and we now have firsthand experience of their stellar work. The precision craftsmanship and professionalism are impressive. We had our chimneys repointed, brickwork restored, and a basement wall resealed. It all blends seamlessly and looks gorgeous. Ask for Sam as your foreman if you can, he was amazing. The entire crew was fantastic. Kudos to Paul and the leadership for building a great team. Impeccable service and beautiful finished product.”

Chimney & Basement Sealing
AA

Adam Arif

Local Guide · 98 reviews · 1,020 photos

2 Years Ago

“Pennacchi & Sons does amazing work. They restored my front door steps which were in bad condition. They fixed all the chips and cracks and painted them. Very professional and great service.”

Stone Step Restoration
VC

Victoria Chow

9 reviews · 9 photos

3 Years Ago

“Water was getting into my house because of the old brick exterior. It needed to be repointed and painted on the interior. Although this was a very small job, Paul and his son Paul Junior were incredibly professional, listened, and addressed my concerns. I left their crew to complete the work without being home and everything was safe and secure when I got back. They kept their work areas clean and took away their trash. Paul’s price was the most competitive. HIGHLY RECOMMEND.”

Brick Repointing
WR

Wayne Richardson

8 reviews · 1 photo

3 Years Ago

“My basement was leaking really bad and had 2 different companies come out and try to fix the problem with no luck. Decided to try a third time and luckily I came across APS. They came out and did amazing work and solved all my issues. Put in a French drain, sump pump, and stuccoed the walls. They had to fix all the problems the other companies did, and it was a great experience working with them. Paul was extremely professional. Highly recommend if you need the job done right the first time.”

French Drain & Waterproofing
SB

S. B.

Local Guide · 14 reviews

3 Years Ago

“These guys did a great job on my chimney with stucco.”

Chimney Stucco
SS

Shibani Sharma

8 reviews

3 Years Ago

“Excellent work. Very professional.”

General Masonry
ES

Ellen Scanlon

Local Guide · 13 reviews · 1 photo

5 Years Ago

“Pennacchi is the best. We had several jobs done in the past few months and found Paul and team to deliver exceptional work and service for reasonable prices. Very knowledgeable and professional. We had the basement waterproofed, foundation redone, and steps repointed. Extremely satisfied.”

Foundation & Waterproofing
BC

Bill Cunningham

Local Guide · 78 reviews · 265 photos

5 Years Ago

“The best in the business. Ask for Paul. Tell him Billy C. sent ya.”

General Masonry
KT

Katia Ten Eyck

Local Guide · 24 reviews · 69 photos

6 Years Ago

“We hired Pennacchi and Sons to waterproof our basement. We did not necessarily have issues, we just wanted to prevent any moisture problems in the future. We consulted with a few other people before speaking with Paul, the owner. Paul came up with an effective and cost-effective solution for us. We are very happy with the service and highly recommend Paul to everyone.”

Basement Waterproofing
JM

John Monsport

7 reviews · 1 photo

6 Years Ago

“These guys did an amazing job for us. 20 years of trying to get my basement dry and these guys finally got it to work. We actually had another company do it 15 years ago but we always got water back. Paul and his brothers worked hard and they cleaned us up as well. Thanks for letting me tell this story guys.”

Basement Waterproofing
MS

Mike Salvador

2 reviews

6 Years Ago

“I hired Pennacchi and Sons to do repair work on my chimney. In the 3 days they were here, they did an excellent job from start to finish. They also left my home in the same condition as it was before they came. I could not recommend this company more and would definitely hire them again if I needed future masonry work done.”

Chimney Repair
MB

MeghanB

16 reviews · 2 photos

6 Years Ago

“Gorgeous job repairing and painting my chimney.”

Chimney Repair & Paint
BK

B. K.

Local Guide · 56 reviews · 1 photo

6 Years Ago

“You want the best, call Paul at Pennacchi & Sons. Great work and he stands by all his work. A++”

General Masonry
MP

Marcus Padulchick

Local Guide · 102 reviews · 32 photos

7 Years Ago

“I would use them again. We needed a front porch and patio repaired. They did a great job and are very responsive to follow up. Attention to detail is certainly something I was impressed with.”

Porch & Patio Repair