Get matched with top basement drainage channels installers in Hollis, NH

"Fast and friendly. Reasonable price."

"Just finished a visit with Foreman Doug and his crew, Devin, Sean, and Mason. Waterproofing the basement and super sound and solid work! Doug was professional and very good at keeping me in the loop with the project over the 3 day visit, and created a solid system that we are confident will keep water out of the basement forever. Above and beyond as well with problem solving when having to find solutions to fit our basement layout, all with a solid financing option/great price and 5 year warranty/ yearly inspection plan. If you are stuck with water in your basement, get Groundworks working for you ASAP!"

"They did a fantastic job! We have had driving rain since the installation and our basement is bone dry. They came on time, were very polite and I'm very happy with the fast train system they installed."

"Great service! Emergency service and done within the day!"

"Cody and his crew were amazing-- we had a complicated issue that required multiple visits and coordination with the city's engineers. Cody was professional, knowledgeable, and as dedicated to getting the job done right as if it had been his own home. His quotes were accurate and competitive, he and his crew were on time (and often stayed late!) and kept the work area clean and safe. We will never call anyone else!"

"I had a small gutter repair. Joe and his team replaced the gutter in short time and within the budget. His work is excellent. I would hire him for any future gutter needs"

"I had Dan and his team dig a full perimeter french drain in my basement, with a sump pump in the corner. They were on time and worked hard. However, the french drain and sump pump he installed in my basement was not done properly, and thus is not functioning properly. The sump pit was not placed low enough, and when water rises in the lowest spot in the house it does not flow through the drain and into the pit, where it can be pumped out by the sump pump. Numerous calls and texts, with offers to work me into his schedule, and almost two months later I'm still left with pooling water that can't reach the sump pump because the pit was placed higher than the lowest point in the house. Additionally, Dan cut through the top of the sump pit cover, leaving me with an exposed pit in my basement, which is not normal, illegal in some states, and contrary to recommendations from the American Society of Home Inspectors. When I protested the lack of a sealed sump pit, Dan proceeded to tape garbage bags across the top to create a moisture barrier. This happened because I had asked about adding a third, more powerful sump pump to the regular pump and the battery back up. The pit Dan used only had two knock out holes for piping, so instead of advising me of this, he cut the top open to fit piping for the third pump. Had he advised me properly, I would have opted for two pumps, so we could use the lid as it was designed, and seal it properly. Overall it was a fine experience while they were working here, but a combination of bad advice, no advice, and poor installation have left me with pooling water at what remains the lowest spot in my house, a dry french drain, and an empty but exposed sump pit."

"Nick and the crew were professional, hardworking and did above and beyond. I can't express how much I appreciate the hard work they did within my basement to redirect the ground water to a new sump pump; it rained out heavy the next two days and my basement was dry, and my new sump pump was working great! I couldn't believe what a great job they did it shows they did not cut any corners and new what they were doing. I highly recommend Supreme Waterproofing to all you friends in need of a dry basement I know I will. Thank you Nick!!!"

"Great! Looks like a brand new kitchen."

Family owned. 5 employees.