Mud Jacking

ultimatedecks

i have a customer with a hole under her patio 14 ft. long about 6" deep is mud jackig a solution? the patio is 15 x 15.

mickeyco

I've had it done a few times with no problems. I think the only issues are what material they pump in, one is supposed to be better than the other, I forgot which one and the other issue is cracking of the concrete.

I saw expanding foam (Great Stuff) to "mud jack" a patio on an episode of This Old House.

mdshunk

Of the people that I've known that have had mud jackers level patios and sidewalks, it seems to me like the results are a crap shoot. Do any of these guys have any sort of guarantee on what the outcome might be?

POOLMANinCT

yes but merely to fill the void, I've used an outfit to do this mud jacking aka mud raising, will fill a void or lift a slab.....
but without correcting the drainage its a waste of money & effort.. plus its a small slab

__________________
......Less with the jaw & More with the paw.....

POOLMANinCT

I hope this catches concretemasonry 's eye.
if like to see a tech & practical analysis of "mud jacking"

__________________
......Less with the jaw & More with the paw.....

PipeGuy

What do you want to accomplish?
If you merely want to fill the hole, you needn't "jack" anything.
If the object is to level the patio, mud jacking may or may not be an effective option;as MD noted, results will vary greatly. The type and condition of the soil as well as the slab's structure play a large part in how useful mudjacking can be.
If the slab is way out of level, and the top of the patio can stand being at least 1-1/2" higher, you might consider filling the void bneath the slab and pouring a concrete overlay.

__________________
Fortunately I keep my feathers numbered for...for just such an emergency. -Foghorn Leghorn

Driftwood

Bust up and out the old slab. 4" compacted base rock, 4" slab w 3/8"
rebar each way. doing one right now

Driftwood

Re bar is 16 " on center

concretemasonry

You can use mudjacking if the hole is under the slab. If it is on the edge, the "mud" would run out unless contained.

A mudjacker could give you an estimate or opinion on the results. Many mudjackers carry a piece of heavy chain that they can use to sound for any other voids.

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Dick

Engineer, designer and consultant recently active domestically and internationally on construction and design in about 35 countries.