 they can get through there um if your crawl door doesn't fit tightly they definitely can get through there um once they get in your crawl space i'm pretty sure with this humidity and if you don't have a dehumidifier for snot encapsulated you're going to have moisture issues down there which that's the perfect breeding ground for them they can live down there very comfortably all year long so once they make their way into your crawl space um you know then they'll start climbing up on the floor choices um you have plumbing pipes or trunk lines that are coming up into your house