If you're trying to sell your home, a real estate agent may suggest fixing uneven sidewalks to prevent injuries and subsequent liability claims. Mudjacking may be an easy fix.

Is your front porch stooping? Your sidewalk slouching? Mudjacking (also called slabjacking) may be the answer. Here are some tips from highly rated service providers on Angie's List:

What is mudjacking/slabjacking?

It's a process used to fill voids under concrete with a mixture of cement and soil that is pumped under pressure through holes drilled into the concrete.

Why should I use it?

It's significantly cheaper than replacement — about one-third the cost — and the surface retains a weathered look, says Shannon Schwehm, president of Superior Slabjacking Inc. in Stanwood, Wash.

B. Charlton Howell of Charlton's Concrete Correctors in Indianapolis says most jobs cost $300 to $700. "It's a lot less disruptive and more cost-effective than tearing it out and replacing it," he says. He advises homeowners to hire a contractor with slabjacking experience and integrity. "The cheapest price is not always the best way to go."

When should I use it?

Schwehm recommends slabjacking when concrete has settled a half inch or more, and refers customers to specialists for more extensive home foundation repairs.

When is it not the answer?

If the concrete has cracked into pieces, mudjacking will not improve it. "If you want it to look brand new, slabjacking is not for you," Schwehm says. Florida homeowners should test the soil to make sure there are no sinkholes or lime cavities under the concrete, says John Jimpie, owner of JonSolutions Inc. in St. Petersburg, Fla. Jimpie also recommends mudjacking to solve drainage problems that cause concrete to erode.