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Avatar for Groundworks
Groundworks
4.6(
26
)

Serving Nelson, NH and surrounding areas

Approved (Corporate)

In business since 1996

Free estimates

Warranties offered

"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!"
Foundation
Foundation
Foundation
Basement
Basement

+16

Response time12 hrs
187 neighbors recently requested a quote
Recommended by56%of homeowners
Timeless home improvements
New to Angi

Serving Nelson, NH and surrounding areas

Approved

Emergency services offered

Warranties offered

Small jobs welcome

As a highly skilled framer and carpenter with eight years of dedicated masonry experience, I bring a rare and comprehensive understanding of structural development to every project. My background blends the precision of finish carpentry and the durability of robust framing with an extensive mastery of concrete, stone, and brickwork. This unique dual expertise allows me to seamlessly bridge the gap between foundational masonry and structural woodwork, ensuring structural integrity, exceptional craftsmanship, and efficient workflow management from the ground up.

3 neighbors recently requested a quote
Sonart Construction Corp.
2.3(
7
)

Serving Nelson, NH and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"I recently had my shingle roof replaced and I?m very happy with the results. The team was professional, punctual, and completed the job efficiently. The quality of the work is excellent, and the new roof looks great. They kept the work area clean and communicated well throughout the process. I would definitely recommend them to anyone needing a roof replacement."
Avatar for Green Mountain Basement Solutions LLC
Green Mountain Basement Solutions LLC
4.0(
30
)

Serving Nelson, NH and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"The work itself, the actual basement waterproofing appears to be working but our flood season hasn't come yet so, I'm reserving judgement. But, the way the work was done was a problem and the initial way that they got with the problem wasn't satisfactory. Eventually, months after work I did get some resolution but is wasn't a smooth transaction. We moved some of the finished portions of the basement to do their work and the way that that was handled was very sloppy and rushed, and very expensive to repair. And then, when the initial point of having somebody come and look at all my questions, it was not the owner, it was his foreman and it was not dealt within a professional manner. After 2 contacts, tried to explain what the problems were and has offered that they have an annual service to make sure that everything is working and there's a fee for that, though he offered 2 years of that with no cost, so that was a nice gesture. He tried to make up for the problems but like I said, there were problems."
Recommended by75%of homeowners
Avatar for St. John enterprise
St. John enterprise
5.0(
6
)

Serving Nelson, NH and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"St John Enterprise provided a professional service at an affordable price. Their communication and customer skills are excellent. They showed up on time and worked efficiently to deliver high quality work. The patio and front step have received many compliments, and truly exceeded my expectations. I will definitely hire these guys again any time I need concrete work done!"
Sidewalk
Basement garage duo
Sidewalk/apron
Concrete - Stamped & Decorative Project
Concrete - Stamped & Decorative Project

+73

Recommended by100%of homeowners
Avatar for Locke Dry Basements - Contractor - Center  Facebook - 4 Photos
Locke Dry Basements - Contractor - Center Facebook - 4 Photos
4.2(
6
)

Serving Nelson, NH and surrounding areas

In business since 2000

Free estimates

"job completed as stated. On time, thorough and no mess left behind. We have had a few rain storms since the repair was completed and the crack did not show any signs of leaking. thank you"
Recommended by100%of homeowners
M2 Construction & Masonry
3.9(
8
)

Serving Nelson, NH and surrounding areas

In business since 1990

Free estimates

Credit card accepted

"Mike did a great job fixing my chimney and replacing some of the bricks. He also waterproofed the whole thing. While he was up there he noticed a crack in the inside liner. He fixed that also. He showed me all the work before and after using a drone. Did a great job and didn’t have to wait long to get it done. He also fixed all the caps on my stone wall that had come loose. Everything looks great. May have a leak in the roof and if so will certainly hire him again."
Repairs
Repairs
Repairs
Repairs
Repairs

+29

Response time1 day
Recommended by75%of homeowners
M3 construction and masonry
2.6(
8
)

Serving Nelson, NH and surrounding areas

In business since 1963

Free estimates

Offers commercial services

"Price seemed a bit high for such a small job, but they could do it the same day. They did come down on the price when I agreed to get it done today. However since then Iâ ve noticed that the mortar in the patched area is nearly flush with the brick face, whereas the other mortar (the whole rest of the wall) is set quite deep in. The patched area really stands out as a patch. They didnâ t match the mortar depth to the rest of the wall. Iâ ve repainted the entire hearth to see if that helps, but itâ s still quite noticeable. Not impressed. Lesson learned."
Walkway
Stamped concrete
Work
Work
Work

+7

Response time2 days
Recommended by42%of homeowners
Avatar for T Design Masonry
T Design Masonry
5.0(
1
)

Serving Nelson, NH and surrounding areas

In business since 2023

Free estimates

Emergency services offered

"Good quality work and very good price, honest and cares about whatâ s best for the customer. I will be using Top Design Masonry again for most home improvement needs going forward."
Response time4 hrs
Recommended by100%of homeowners
Showing 1-10 of 13
Concrete Mudjacking questions, answered by experts

It’s best not to perform mudjacking in the winter unless the ground temperature remains above freezing. Freezing temperatures can cause the slurry to harden too quickly, compromising its strength and longevity. Concrete is also more susceptible to cracking and splitting in cold temperatures, so there’s a higher risk of damaging the slab during the drilling and lifting process in winter.

Polyjacking can be a permanent solution to sunken concrete if you also address the underlying issue—like poor drainage—at the same time. The polyurethane material itself can last as long as or even outlast the concrete you’re lifting it with. Your sunken concrete issue will likely return if you don’t couple polyjacking with proper drainage to prevent future soil movement and sinking.

Yes, expanding foam (also known as polyurethane foam) can lift concrete. This approach, called polyjacking, involves injecting the foam rather than concrete slurry to fill voids and raise the concrete slab back into place. It’s often faster and requires smaller drill holes than traditional mudjacking, though it may come at a higher cost. Some contractors also prefer polyjacking over mudjacking for more damaged and delicate slabs.

Common issues with concrete that may require professional repair or resurfacing include cracks, spalling, uneven surfaces, and weather damage.

There is no real alternative to underpinning, although mudjacking and polyjacking are other repair methods that can add support from underneath your foundation. Rather than placing supportive piers under your structure, these involve pumping a material under your slab to lift a sunken section back into its original position. Polyjacking, in particular, is sometimes a suitable solution for stabilization issues under slab foundations, but underpinning is often accepted as the best and most permanent solution.

The Nelson, NH homeowners’ guide to concrete mudjacking services

From average costs to expert advice, get all the answers you need to get your job done.