Void under the concrete

[Eatbeef]

I have a crack in my basement wall that weeps when we have a hard rain. Theirs an attached garage and a small room that border the wall. I’ve crawled under the room part and can tell the ground has settled from where the basement was dug. I assume it’s also settled under the garage floor. Is there anything similar to mud jacking that I can do myself to fill in the void?

 

[GMCGarage]

try this
https://www.homedepot.com/p/Sika-33-fl-oz-Fence-Post-Mix-7116170/300934597

 

[Eatbeef]

I’ve thought about drilling holes along the wall and doing something like that but I have no idea how much it will take. I think that product could get pretty expensive. I know some mud Jack businesses use an expanding foam that’s supposed to be more stable. Can’t find a DIY kit or any info to help figure out it I could do it myself

 

[In2toys]

I tear out a lot of concrete. Not a real big fan of either mud jacking or the foam.

 

[Eatbeef]

I tear out a lot of concrete. Not a real big fan of either mud jacking or the foam.

All I know about it is what I’ve read online so I appreciate your insight. The garage floor has not dropped or even cracked so I thought the foam may be a less costly way to fill the void to help keep water out.

 

[ant.foste]

Step 1: Identify and correct the issue causing the undermining of your slab. It sounds like you're having a groundwater issue during heavy rains.

 

[Bluedodge]

The MM-80 guys sell an expanding foam for injection under slabs. Not cheap, but the stuff works.

http://metzgermcguire.com/stabilizer-exp/

I agree with ant.foste. Unless you cure what is causing your drainage issues, this is a band-aid and not a permanent solution.

 

[kbs2244]

Pay for experience.
Go with the pros that see it all the time.
Call a mud jacking contractor.

 

[Jrad235]

As a Mudjacking professional, we always recommend that you correct the drainage issues that caused the void in the first place. That being said, we don't have xray vision. If the concrete hasn't settled, the only way to check for voids is by drilling holes in your floor every so often and seeing how far the drill drops. Most of the time, unless you have a large drainage issue, the void is less than a couple inches and the floor is still being supported in some spots.

 

[Rod N]

I drilled holes and used floor leveling compound.

 

[pogrelis97]

How do you know there is a void under the garage floor? Any garage should be backfilled with rock to prevent this. obviously this isn't always the case with older homes or cheap builders though...

 

[Eatbeef]

I don’t know for sure there is a void but knowing how they backfill around basements without compacting so it doesn’t push on the walls and that you have to come back years later and fill in what has settled I’m assuming there’s a void. Also looking under the house along the same basement wall as the garage you can see that the dirt has settled a foot or so. The house was built in 1965. I do plan to reslope the front yard but water’s going to follow the least path of resistance and if there’s a hole under the garage it’s likely going to draw water when the rest of the soil surrounding it is saturated. That’s where I’m thinking that filling in any spots where the ground has settled would help push the water elsewhere.