I have been there and done that. Five years ago my prior home (pier & beam) had settling problems, we live in an area with a clay base. I obtained estimates from three companies that were all over the map. The low bidder wanted to trench under the affected area and back fill with concrete, lots of concrete for about 5K. The next recommended their cable tension system at 15-20K. The final one quoted 30K for their system which involved driving 4" steel pipe into the ground until they hit bedrock or 7,000 # of resistance. Not being smart enough to separate the BS from the best I hired a structural engineer to evaluate the problem and solutions. He strongly recommended the steel pipe being driven. We followed his advice and the home was leveled with 29 steel pipe piers and some addition support piers under the house. There was some additional settling afterwards but this was adjusted free of charge under the lifetime warranty. My brother-in law had one of his rent house on a slab that he had problems with. They did have to jackhammer through the foundation but I don't have details on the extent or cost involved.
I have a 10 by 15 screen room and the slab is split in half due to settling. The settling is due to allowing critters to borrow under it.
I have a company coming out Wed. to pump foam under it to fill in the void and raise it a little.
I'll let you know in a couple of days.
This method wont work on a structural foundation.
There are good videos on youtube showing how they jack a house for repair. I'm sure it cost a lot but if it needs to be done, what options do we have?
My house was on a slab.
We lived in it for 40 years.
The 'center' of the house stayed high while the outer perimeter settled, considerably.
I decided that I needed to have it jacked.
Well, what a cluster bomb.
It had to be done, really.
But, because of the amount of upward shift the roof buckled the roofing tiles, my sliding glass door (92" wide) no longer rolled home to be locked and my front door was really junked up.
I was in the house when it was being done. Things were falling off of shelves in the bedrooms. It was a creepy feeling, and loud.
My son came over and set with me in my living room while it was all 'happening'. He told me later that when he left me that he got in his truck and he was just shaking. He felt so bad for me knowing what I had ahead of me to make the house 'right' again.
I believe the cost was $300 per hole and there were 22 holes.
Now after all was said and done it was worth the money to have it done right.
It was really brutal on my psyche. Forty years in that house and now all of this.
One thing I was extremely happy about was that no plumbing issues arose from the drastic upward shifting of the foundation. No broken drains or pipes leaking. And, that's a good thing.
If your foundation needs a lot of attention just remember it is not for the faint of heart.
A funny perspective though is that at around six thousand plus dollars to jack the foundation put it at about one third the price I paid for the house, brand new.
Bought another brand new home about a year later and sold the old one.
Told mamma it was time to go.
bdGreen
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Pump foam?? Never heard of that. Drilling the slab, and pressure grouting is done all the time