certified company
Based on 130 reviews
Our Certification Process
Best Pick Guarantee
Verified General Liability Ins.
9th year as a Best Pick Call
"I spent a number of years as a construction field engineer on large commercial projects. My strength is knowing construction. I like giving personal service. You are not hiring a big company. You hire me, my knowledge, and my experience."

Charlie Flagg | President
Company Information
Services Offered
Flagg Waterproofing offers a variety of waterproofing services for foundation repair, including injections, Kevlar stabilizers, reshaping landscapes, building retaining walls, rerouting downspouts, and installing sump pumps. The company diagnoses and solves water problems associated with the foundation in addition to providing consultation services prior to renovation. Flagg Waterproofing specializes in the injection method with concrete foundations and has experience with all foundation types.
The company offers a 100 percent customer satisfaction guarantee.
Company History
Flagg Waterproofing was founded in 1989 by Charlie Flagg. Before starting Flagg Waterproofing, Charlie worked as a field engineer and was responsible for constructing commercial projects.
Areas Served
North Atlanta, Cherokee, Dunwoody/Sandy Springs, Gwinnett/East Metro, Roswell, Alpharetta, Johns Creek & Cumming, Cobb/Marietta
A selection of 130 homeowner reviews:
“I love their services. They've done work for me in the basement twice, and it's always been exceptional. I would grade Flagg Waterproofing as an A+.”
“I had an extremely positive experience. They did what they said they would do, and they kept after the problem until they solved it. They were a pleasure to work with. I'd give them an A+.”
“They're very experienced. They built a small wall in the basement and graded the area. The tech explained it well, and he did a great job. I would give them an A.”
“Flagg Waterproofing did a great job. They did awesome, and they solved my problem; it's not eroding anymore. He knew where the soil was eroded and where water was coming in, and he fixed it. I'm very happy—no more flooding. I would give them an A.”
“It was excellent work with no complaints.”
“They were very helpful, and they did their job in a timely manner. I had a leak in my basement. I would grade Flagg Waterproofing as an A.”
“It was three months ago, and it was a good experience. I've used him before. I would say it was very good work.”
“They were thorough and resolved the problem in the downstairs bedroom and basement that a larger company did not. I would rate them as an A.”
“I liked their personal, friendly service. They were addressing a leaky basement in an old house in the Virginia-Highland area. I would give them an A grade.”
“They were professional, held their commitment, and did a great job. I had a couple of leaks in the basement that were active, and they fixed those. They proactively fixed a few other spots just to ensure that they didn't cause trouble while they were there. I would give them an A rating.”