Saint Louis (as well as the rest of Missouri) endures cold winters. If your crawl space is not properly insulated, then you are more vulnerable to a host of issues with your property. Notably, the risk of your plumbing freezing during the winter months is much greater without proper insulation. This could lead to the need for expensive repairs and time when your plumbing system is out of service.
Additionally, you may experience higher monthly heating and cooling costs without a well-insulated crawl space as well, especially during cold winter months and warm summer months. Your crawl space could also develop water damage without reliable insulation, which can compromise the structural integrity of your property’s foundation.