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Lifting Sunken Concrete Repair Types ?

4

427HISS

Well-known member
Joined
Aug 15, 2005
Messages
746
I have problems with my driveway and sidewalk that are sinking and cracks. My entire sidewalk needs to be lifted. It's mostly in good condition with only a few cracks.

A neighbor had 2 company's come out and lift his driveway, but what ever the company used did not work well.

Has anyone hired a company that used a concrete slurry, mud, expanding foam or other, with great results ?

I don't want to spend a lot of money on a system that does not work !

Is it better to hire a nation wide company or a local business ?
 
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rsparks64

Well-known member
Joined
Mar 22, 2015
Messages
582
Location
Hill Country Texas
We had a company lift a sidewalk and it worked well. They did pump something under it but I don’t remember what they used. I would think that a respectable company could do a good job on a driveway since it sounds like it is in reasonable shape, but would probably hunt around and get some estimates and comments from several companies. You might want to avoid the company your neighbor used.
 
C

carlaisle

Well-known member
Joined
May 14, 2022
Messages
375
With a national chain mudjacking outfit I would expect higher prices and poorer quality but there are exceptions to every rule. Ask around until you find someone who is satisfied with the work they received. Look at the work yourself to see if it meets your standards. Don't be surprised if you need them come back and do the same thing in a year or two. That's not a sign of shoddy work in that business. It's an unavoidable result of the substrate being poorly prepared before the concrete was first installed.
 
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4

427HISS

Well-known member
Joined
Aug 15, 2005
Messages
746
A

AC-WC

Well-known member
Joined
Jan 22, 2023
Messages
772
Location
NE, Indiana
Had the left bay of my garage jacked at least 15 years ago and still no movement. It didn't need to move much to make it level maybe an inch?
I would do it again. If I remember right it was in the $700 range but again 15 yrs ago. Local well known company.
 
C

czarjl

New member
Joined
Mar 11, 2026
Messages
3
Concrete leveling / mud jacking / slab jacking / grout pumping... or what ever the name they call it in your area, it can be a very effective way to raise a concrete slab this is in good condition. I would expect the cost to be between 1/4 and 1/2 the cost of replacement and should be able to walk on it same day, drive/park on it in a couple of days.

The key to a successful and long lasting fix is completely fill the void under the existing concrete slab, this takes time and materials so the short cut is to just put enough material under to get the desired lift.
If there is settling of the slab after it is raised and the void completely filled it is typically one of two things,
1) The ground is not completely settled when the slab was raised. This is most common on new home front step, the builder back fills around the foundation (with god knows what) then pours the step/slab, in a year or two it settles a couple of inches, home owner has is raised but the ground underneath has more settling to do or often the wood off-cuts tossed in the hole rot out and create a void. The new void collapse as part of the freeze thaw cycle and more settling.
2) The gutter or sump-pump is emptying across or under the slab slowly undermining it.

There is an assortment of materials that can be used to lift the concrete slab. In my area its lime stone dust but fly ash, mortar/grout mix and even clay/mud can be used. I have seen that some outfits are using some type of poly expanding foam, I not a fan of this one.

Like with most contractors you have good ones, bad ones, and some in the middle, I would get a couple of quotes and look at their reference work.
 
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