2016 EBSCO Research Best Pick

A.J. Waterproofing

1st year as a Best Pick

  • A-Rated
  • Verified License(s)
  • Verified General Liability
  • Verified Workers' Comp

"A.J. Waterproofing has built a reputation of honesty, integrity, respect, and responsibility—we will always do what is right, at all times. We handle one job at a time to assure the customer a clean, professional, and correctly installed system. This is how our company has been run for over 40 years."

A.J. DiElsi | Owner

Areas Served:

Montgomery County, Chester County, The Main Line, Bucks County, Delaware County

  • Services Offered
    A.J. Waterproofing provides basement and crawl space repair services for residential and commercial customers, including waterproofing, foundation repair, and downspout extension. The company also offers sump pump, battery backup, French drain, and drainage system installation.
  • Warranty
    A.J. Waterproofing offers a transferable lifetime warranty against water seepage for treated areas.
  • Awards & Certifications
    The company received a Pulse of the City Star Award in 2015 for Excellence in Customer Service.
  • Company History
    A.J. Waterproofing is a local, family-owned-and-operated company that was founded in 1976. Owner A.J., his wife Caroline, and their two sons currently run the business.
  • Licenses

Select Quotes from Customer Interviews

A selection of 58 homeowner reviews:


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Everything went great. Everything was fantastic.
They were very thorough, they were very professional, they quoted us a price, and they stuck to it. There were no additional costs. The installation was done exactly when it was scheduled, and it was trouble-free and very impressive. They did a complete perimeter and French drain, and they did a sump pump system in our basement. I would definitely grade them as an A.
The work was done several years ago. It was very successful. It dealt with my problem of water in the crawl space, and they put in a French drain, which is a bed of stones and piping that takes off excess weather water from big storms, right next to the house. It was entirely successful. I'm very pleased. I didn't deal with customer service. They just had one contractor that was my contact. The company was a referral through another contractor, so I didn't deal with any office people. I would give the company an A grade.
He was a pretty nice guy and very direct. They put a French drain into my basement. They're an A-grade company.
They did a good job. They did a French drain. There were no issues with the workers. We had one issue with the job they did and we called them. They came out right away and fixed it. I would recommend them. They get an A grade from me.
I would say they did a decent job, and they completed it. They did a partial French drain. The customer service was very good. I would rate them as an A.
They are good people, and they did what they were going to do. Everything they did was promised, and it was done. It was foundation and waterproofing work. They were recommended to me. They're an A-rated company.
I had a good experience with them.
They did a great job.
The job was just waterproofing. A friend of mine referred them to me. I would grade them as an A.

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