It depends, if you have a vented crawlspace, then it is not advisable. A vented crawl space is open to the elements and has a high risk for mold, pests, and high humidity all of which can damage your stored items.
However, with our crawlspace encapsulation, you can have a controlled environment that can make the space usable for storage. Our full encapsulation will include a layer of TerraBlock, providing a layer of insulation over the dirt floor, also making it more comfortable to move around on. A CleanSpace vapor barrier is then secured over it, this is a 20 Mil woven barrier backed with a twenty-five-year warranty against tears and rips while keeping the water out. The foundation walls are insulated and air sealed, and every vent is sealed up. As a final piece, a SaniDry dehumidifier is installed to keep the humidity levels under control. All of these work together to make a crawlspace ready to be used for storage if wanted!