Whether a roadway or parking lot, the pavement and underlying material need to withstand the loading being applied, this is the “use” consideration. The stresses at the bottom layer of the pavement (subgrade) is part of the consideration when selecting the application. Understanding these quality characteristics will inform the scope of the project, so that not only the desired quality is achieved, but the full cost benefit of the work is realized.
There are options to improve the subgrade soils conditions if the soil is susceptible to moisture. For example, treating the soil with an additive, such as lime and/or a portland cement.
This is where a cost benefit analysis comes into play. We can help you analyze all the existing conditions; development a cost benefit analysis based on different approaches and help you make the most informed decision.