The excavation process focuses on preparing the grounds for your construction project. The soil on the job site will need to be evaluated to determine if it will avoid deformation that could cause the concrete to crack. After shaping the land, your team will focus on preparing the subgrade. Your team must slowly go over the installation site with a compactor to keep the land from shifting beneath the finished concrete slab. The compactor jostles and rearranges the soil granules to tightly press them together and create a stone-like foundation. This process also prevents the soil from slowly compressing under the weight of the poured concrete.