Dirt fill beneath the slab that has not been properly compacted may create voids beneath the concrete. No matter what’s prompted your sidewalk to sink, we will take care of it! We've been a full service Decorative Concrete Contractor which has about 29 yrs of blended seasoned in all regions http://denverconcretecompany49256.review-blogger.com/15952071/the-greatest-guide-to-small-concrete-projects