How to raise a cement apron?

[Meat-Run]

hey folks i'm in need of some technical/terminalogy for the process to lift, raise or resupport my cement apron infront of my garage? It's saging or loosing some material underneath and wander what the process is to get this back even with my garage flooring can anybody help me out (not physically of course)?

thanks,

mr

[pooly_31]

i've seen commercials for this process, i think they called it mud jacking. basically drilled a bunch of holes in the slab and pumped mud or cement under the slab to level it out.

[RebelSS]

Yup. Mudjacking. I've had two of my main slabs mudjacked over 12 years ago, and they're still okey-dokey. Have heard some people say it's a waste of money, but it sure worked for me. Holes are drilled into the 'crete, then a slurry of mud/concrete mixture pumped under pressure until slab is raised. Holes plugged and troweled smooth.

[pureinsanity]

Ive taken slabs out that had this done. Seems to work fairly good. You could always remove it and put in pavers? or remove the apron and make sure the base is correct and repour too.

[B@ssmaster]

+1 on the mudjacking. I have had it done to a slab under my dog kennel. Worked great!

[Meat-Run]

Mudjacking: is this something a person can do themselves or contract out? I assume my local concrete company does this? How about cost for 4x8ft section?

thx

mr

[Farmboy1]

Contract. It takes specialized equipment and knowledge. they will drill a small hole in the concrete and pump concrete under the slab under pressures to get it back to level and the area underneath it will be concrete.

[Meat-Run]

Great thanks farmboy1.

mr

[Tom7227]

I had the identical problem caused by the failure to cap off the blocks that were put on the footings for the garage. Material keeps washing down into those voids and you end up with a hollow spot. At one point I think my kid could have crawled in there. I have packed sand, rubble and it still happens. It's on my wife's side of the garage so I can't get too excited over it.

[deerminator]

I've heard a lot of adds for sandjacking too. I would assume they're biased but the people offering those services claim its better than mudjacking because it goes in dry and wouldn't lose its volume once the moisture leaves. I have no idea or experience if this is true, just offering another option to investigate.

[pureinsanity]

Ive taken steps out and replaced them with retaining wall. They had the mud jacking done several years ago and when we removed the steps it was still wet... I imagine it takes a long time for mud jacking to loose its wetness

[delcecchi]

I had some mudjacking done on a couple of concrete aprons at our house in Rochester at least 20 years ago. They are still nice and level.

[Tom7227]

I had a problem with mine because the blocks that were used for footings weren't capped off and so all the sand/gravel washed away and it was a mess. I broke out the old apron, did the best I could to fill in those block and put in a new apron. The floor of the garage was also covering a large void. I filled it in the best I could with rubble from the broken apron and sand. If you have a problem like that I would bet that mud jacking won't work, and it may end up being more expensive than just taking out what you have and putting in new.

[LightningBG]

I had a friend that got estimates for mudjacking and sandjacking. He was going to do the mud, but accidentally gave the go ahead to the sand place. It was a little more expensive, but he was very pleased with the result.

[jentz]

Only read the first few posts mud jacking is great but expensive for the apron! Use bars and levers to raise the apron and block it up.use sand under it get the sand to the elevation you want sprinkle water on it to settel the sand and fill again.reverse the lifting process and set it back down.Sand and your labor are cheap