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Foundational Concrete Services is a Nashua, New Hampshire concrete and masonry company serving residential and commercial properties. BBB lists Arnold Denis as owner, says the company began in 2018, and describes work including decorative concrete, concrete repair, leveling, restoration, flatwork, retaining walls, patios, and outdoor living projects. Homeowners consistently describe concrete slabs, garage and shed floors, driveways, walkways, patios, pool surrounds, drainage work, stairs, and retaining walls. In reviews from 2023 through 2026, customers repeatedly mention clear explanations, responsive communication, careful scheduling, clean worksites, design help, and finished work that met expectations. One reviewer specifically described a basement pour after water-loss demolition, while others discussed French drains, drainage corrections, stamped concrete coloring, cold-weather pours, and slabs designed for future structures. Before booking, ask how the scope, drainage details, weather timing, and any site cleanup or remediation will be handled. One patio review praised the communication and drainage suggestions but noted that material got onto another patio area and was still being remedied at the time of writing. BBB gives the company an A+ grade and reports zero complaints, but also states that it is not BBB accredited. This is a strong fit for homeowners planning substantial concrete flatwork, stamped patios, walkways, slabs, retaining walls, or related outdoor improvements. Confirm the written scope, finish and color selections, drainage plan, schedule, and cleanup responsibilities before work starts.
Dakota and his crew did a great job replacing the concrete floor in our 2 car garage. It had to be done under a tight schedule, which resulted in some long days, but it got done on time. Communication about the steps involved and job progress was excellent. Highly recommended.
Dakota & his team did an excellent job on a monolithic slab for my 24X25 metal building/garage. Dakota even helped with my building permit for the building. Extremely satisfied with everything from start to finish. I highly recommend Foundational Concrete Services for all your concrete projects.
I personally haven't worked with FCS however I know him through college friends and have sent many people his way and have yet to have someone say they weren't solid fair, timely and clean. Happy to know you take care of the people I keep sending your way!
One of the best companies I have had the pleasure of working with. Some of the best work I have seen. Highly recommend this company
Dakota and the team were easy to work with, efficient onsite, and created a great set of walkways.
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3 changes recorded — last scanned Aug 30, 2026.