Underpinning Foundations - Diy underpinning footings method to stabilize settlement

thanks!

We have a finished basement. Doing this to our home, do we have to tear out anything inside the basement.

Can you not Jack up the house back to its old position before underpinning?

Ah-yes-I need that at my front door. Stairs are toast and there's a zillion crisscrossing micro cracking behind the stairs under the front door-no good. She has her big 8-0 in 2029, so it's expected.

What di you do for shoring?

What concrete PSI mix for this job? Is 3900 good and should I tell them to make it a little wet?

What was the breakdown of the slurry you used?

I'm repairing my foundation and I have a section dug out but only from the basement. I have it dug out and clean and rebared. My question is should I put plastic down in the cavity like you would if you're pouring a pad

Show me how to do it, just once

Brilliant information thanks

I'm here to see that corner and what your eng ordered. I've got an addition coming up and my engineer made no mention of supporting the corner of the house where a 4'x4'x10" pad has to underpin where a post (7"x3.5" LSL) and beam (5.25"x20"x21') are going in. My house is just wood construction single floor and I was concerned about the 3'x3' void under the corner foundation where the pad is going.

Talking about amateurs at work

Code inspector haha from the deep woods of Pennsylvania

Buddy you’re one hard working SOB! I know how hard it is to dig down to the footing by hand just to repair one section. You did your whole dam house and down underneath the footing, cheers to you man.

great video. Just wondering how you managed to get all the air pockets out from the top/back corners, as the slurry of concrete rose up to meet the underside of the existing structure. As I would imagine this would possibly be the most important part of the procedure, as without solid concrete (without air gaps) meeting up with existing structure, it would weaken the support considerably. Any advice on how you managed this part of the job would be great to know. Cheers from Australia.

How much you charge for this total under pinning area ?

Thank you for the video.. I bought a house recently, there is a lot of rat holes in the exterior of the house leading to the crawlspace. Because the house was built in 1943 there is no footing. I want to built a trench along with flashers to cover all the entry points as well.. any suggestions?

So you did all this without jacking the house back up wtf

Can you underpin from the inside?

I have to do this to my whole house. Footer is way too thin, both back corners have moved. Thankfully it's a small house.

Made the best out of a poor situation.

Do you have to use rebar or can you just backfill underneath with concrete?

Thanks for the video. How long did you leave it to go back to the skipped 4-foot section?

I just bought a brick house that has the exact same issue as you have here. A company quoted me $40k to fix it. Glad I found your video. With a little help I can do this

Is there anything tying the new pour to the existing stuff?

Do you need to have access to both sides when building out the underpin, or is it possible to pour your concrete from the inside and later on go outside and seal the concrete and build out any drainage?

How did you lift the sagging wall? Ive seen people using 12 ton bottle jacks.

Can I, just a civilian, go around my house, start in the middle of 1 side, and dig a small hole, about the size of a 4" pipe down /under the house, Then fill with a piece of a rebar and concrete. Then let that harden, and bounce around the home periodicaly, doing the same? I understand your advice isn't assigning responsibility to anything. I'm just a layman wanting to know your thoughts.. thank you

Thanks for this video! There are few that address this problem. A question: Does the rebar continue through the sections, linking them somehow, or does each section have its own rebar, unconnected to the other sections?

How much did you charge for this job?

What is going to prevent that heavy concrete from sinking again?

Did you lift the section back to its original level?

So I understanding the underpinning of the sagging slab foundation. But what in the scope of this work that you're doing is going to prop-up the sagging slab to it's original level height?

I would have thrown you off the job for smearing cement all over the brickwork. Sign of a lousy craftsman. your formwork sucks

Ya could have washed the brickwork while the concrete was wet 🤓

This is exactly what's happening to my addition. Unfortunately, my addition has fallen away at one corner and now has separated from the house by about 2inches and is still moving. I've called three foundation repair companies which all gave the solution of push piers, $18k -$20k, which doesn't fix the problem. This would be a better fix but my structure would need to be lifted before this could happen. The addition on my home is 17’ (2) by 29’ (1). The other solution at this point is to tear down and rebuild. I don't know which fix is more economically feasible.

Great video. It's hard to find this kind of information, thanks for sharing.

Was supporting the whole addition and pouring the whole thing in one go an option?
Is there footings under your new pour?

I wish I had you to come look at this house we are in the process of buying. I believe it has this exact same problem but no one will tell me!!! The engineer said “everything looks good” and took my $350 but I KNOW this is the issue. I feel sick. I wish I could contact you!

But how you going to tilt it up if it tip down one side ?

What about drainage, probably was the problem???

good job ..

Good video

I resently did a 4" slab and built an entire 12 ×30 foot house made of bricks on it, if i pin the foundation like this, will it hold the structure and the walls together ?

finally found a video pertaining to my current dilemma. my garage has only a 4" slab no footing once or ever. would this technique reinforce my walls if im looking to add weight to them such as adding stucco, drywall etc.

good vid, thx

thanks for sharing this

Helpful insight - is there a method for avoiding cement splashes on the faces of the bricks though ?

I dug about 2 feet under the house footings (one corner of the house) to pour 40cm of deep concrete than put a concrete block 30cmx30cm of diameter to jack up the house levelling but at this depth clay is softer than where the original footing is. If l pour concrete than level it would it be ok or what is your advice? I need help. Thank you