How to fix void under slab
I had a detached garage built in the Fall of 2023. The builder had to do some grading to get the ground level. They had to build up about 3.5' of dirt where the front left corner of the garage is. The builder did not use any specialized gear to compact the fill dirt, just rolled over it with their excavator. In late June 2024, I noticed some holes around the edges of the ramp leading up to the garage. Digging around the outside of the ramp revealed a significant void under the ramp in the front left corner of the garage. I called the builder out, they attempted to mix and push concrete under there with a shovel but did a very poor job. I called them back out after it was clear there was still a large void and they accused me of digging all the dirt out from under the ramp myself. I decided to call a concrete leveling/mudjacking company who pumped polyurethane foam under the ramp in July. I was hoping I was done dealing with the problem at this point. Unfortunately a couple weeks ago, I was walking along the left side of my garage and my foot sunk in near where the ramp meets the main garage slab. Today I had time to do some digging around the ramp and the void has grown again. I also realized that it extends past the edge of the ramp and under the main garage slab where there's now a pool of water. Would it be possible to dig this area out and properly compact it myself? Or am I better off contacting a pro? If so, who should I contact? I'm sure if I have more polyurethane fill pumped in, it will happen again because we havent addressed the root cause which seems to be a poorly compacted base. Also there's a decent chance the builder buried a large stump in that spot that they said they were having trouble getting out. I've read foundation repair companies just send out salespeople who likely won't be able to actually address an issue like this. Thank you in advance for any advice! submitted by /u/Utility_Biscuit [link] [comments]
I had a detached garage built in the Fall of 2023. The builder had to do some grading to get the ground level. They had to build up about 3.5' of dirt where the front left corner of the garage is. The builder did not use any specialized gear to compact the fill dirt, just rolled over it with their excavator.
In late June 2024, I noticed some holes around the edges of the ramp leading up to the garage. Digging around the outside of the ramp revealed a significant void under the ramp in the front left corner of the garage. I called the builder out, they attempted to mix and push concrete under there with a shovel but did a very poor job. I called them back out after it was clear there was still a large void and they accused me of digging all the dirt out from under the ramp myself. I decided to call a concrete leveling/mudjacking company who pumped polyurethane foam under the ramp in July. I was hoping I was done dealing with the problem at this point.
Unfortunately a couple weeks ago, I was walking along the left side of my garage and my foot sunk in near where the ramp meets the main garage slab. Today I had time to do some digging around the ramp and the void has grown again. I also realized that it extends past the edge of the ramp and under the main garage slab where there's now a pool of water.
Would it be possible to dig this area out and properly compact it myself? Or am I better off contacting a pro? If so, who should I contact? I'm sure if I have more polyurethane fill pumped in, it will happen again because we havent addressed the root cause which seems to be a poorly compacted base. Also there's a decent chance the builder buried a large stump in that spot that they said they were having trouble getting out. I've read foundation repair companies just send out salespeople who likely won't be able to actually address an issue like this.
Thank you in advance for any advice!
[link] [comments]
