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Avatar for Basement Systems Of New York
Basement Systems Of New York
4.3(
42
)

Serving Cornwall, NY and surrounding areas

Approved

In business since 1993

Free estimates

Warranties offered

"Eric the consultant inspected the job site took the measurements he needed and gave us an explanation of how the work was going to be handled. He also offered a discount and scheduled our project for the following week. When the day came the crew arrived on time and went right to work. We will use them again in the future for our pool deck. Overall a great bunch of people and a greater service."
Pouring A New Slab At Our Office - Bullville, NY
Calling A Last Minute Audible To Install A New Concrete Slab - Liberty, NY
Waterproofing A Walkout Basement With Our Patented Two-Stage Waterproofing System - Pine Bush, NY
Installing An Interior Waterproofing System With A Gravity Discharge - Holmes, NY
Knocking Down And Rebuilding A Foundation Wall - Kiamesha Lake,  NY

+7

Response time1 day
20 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Raza & Sons Construction, Inc.
Raza & Sons Construction, Inc.
5.0(
2
)

Serving Cornwall, NY and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

Platinum Construction is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 6 years of experience serving Brooklyn, NY and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

Response time1 day
Recommended by100%of homeowners
Avatar for Concraised
Concraised
5.0(
4
)

Serving Cornwall, NY and surrounding areas

In business since 2016

Introducing Concraised, Leveling your concrete so it’s as even and great looking as the day it was poured.\n\nAt Concraised we use the Foamjacking method to level & repair sunken concrete surfaces. We serve homeowners, residential and commercial property managements & municipalities.\n\nHow it works:\nConcrete slab lifting works like this:\n\n1) Injection of environmentally-safe foam under the existing concrete\n 2) Foam expands to fill the void at the same time compressing the soil underneath\n 3) Slab is raised completely back to level\n\nConcraised, making great first impressions, one perfect walkway at a time.

After
Before, notice the large amount of water sitting do to the concrete setting.
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After

+30

Recommended by100%of homeowners
Foundation Experts, LLC
4.5(
27
)

Serving Cornwall, NY and surrounding areas

In business since 1980

Emergency services offered

Credit card accepted

"Nick and team were extremely helpful, informative, responsive and did exactly what they said they were going to do (and even better when they said they were going to do it). Nick was very reachable via email and was more than willing to help. I hope to never need a foundation expert again, but if I do I know that I would definitely have them do the work."
Recommended by95%of homeowners
Avatar for G Rax Masonry corp
G Rax Masonry corp
4.8(
6
)

Serving Cornwall, NY and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"I was very happy with the finished product. He did the first part and the we hired them to finished the last part of the pavement. We really loved the work. It was pricey, we thought however we loved it and everyone constantly gives us complements on the pavement. They came and finish the job in great time . They were respectful of our privacy and try to finish the project quickly. Came early and left at a reasonable time. Completed the job when they said he would. Definitely will use them again."
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+14

Recommended by100%of homeowners
Avatar for Al Arsh Construction Corp
Al Arsh Construction Corp
5.0(
10
)

Serving Cornwall, NY and surrounding areas

In business since 2001

Free estimates

"Wonderfully. The Al-Arsh crew is always reliable, prompt, professional and highly-skilled. Their work is always done exceptionally well and the owner, Malik, always makes sure it is finished to perfection. Even when we needed something tweaked or if plans changed after they finished, they come and do whatever is needed when needed, cheerfully. Their prices are more than fair and they guarantee their work. We have had Al-Arsh do work for us over the years totaling at least $250K and we ALWAYS chose them."
Recommended by100%of homeowners
Roca Construction
4.5(
42
)

Serving Cornwall, NY and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"Roca and his team were very professional and did a thorough job on repaving my driveway and repairing our front sidewalk. The team delivered as promised and on schedule. In addition they worked quite fast although it was clear they paid attention to the important details. I would surely hire them again and am quite satisfied with the work they did ."
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+52

Recommended by97%of homeowners
Avatar for Tiger Luxury Home Improvement
Tiger Luxury Home Improvement
4.8(
50
)

Serving Cornwall, NY and surrounding areas

In business since 2004

Free estimates

Emergency services offered

"Felipe and his team did extraordinary work. Both interior and exterior painting and staining, cabinet mounting, garage exterior refinishing. They understand how to find the safest and most correct way to do carpentry and any beautification you may need. They are lovely to work with and take true pride in their work. I felt like there was nothing they couldn't do at a very high level. You will not be disappointed."
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+104

Recommended by95%of homeowners
Showing 1-10 of 50
Concrete Leveling questions, answered by experts

Polyjacking and mudjacking can both be effective solutions for sinking concrete, but they have key differences. Polyjacking, which uses expanding polyurethane foam, is often considered a better option because the foam is significantly lighter than the cementitious material used for mudjacking. This reduced weight puts less pressure on the underlying soil and lowers the risk of future sinking. Polyjacking is suitable for any sinking concrete slab, while mudjacking is typically only recommended for non-structural concrete, such as sidewalks, patios, pool decks, and driveways. The primary drawback of polyjacking is its cost, which can be up to four times higher than mudjacking—as much as $25 per square foot compared to a maximum of about $6 per square foot for mudjacking.

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.

Mudjacking typically takes 24 to 72 hours (one to three days) to dry and cure completely before you can resume normal use. The exact time can vary depending on the size of the project. Because the slurry mixture contains cement, it must fully harden to ensure that added weight from walking, furniture, or vehicles won't shift the concrete slab. A professional contractor can advise you on when the surface is safe to use. For comparison, if you use polyjacking instead, the polyurethane foam can dry in just a few minutes, but it's best to wait about an hour before use.

A sinking foundation can be lifted, most often by installing piers to re-level and support the weight of the house. Depending on the cause and extent of the sinking, other methods to lift a foundation include underpinning and mudjacking. Consult a foundation repair pro to determine the best way to lift your sinking foundation. 

Many contractors offer warranties for their work. Confirm terms before starting the project.

The Cornwall, NY homeowners’ guide to concrete leveling services

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