If you are looking for a house and have to choose a crawl space vs a slab, choose a crawl space. The crawl space is a buffer between just having the house sitting on the earth and is better equipped to handle temperature variations better. Since the slab is right on the ground there is more of a chance that the concrete slab will crack. Plus with a slab there is a higher chance of pests of the
. creepy crawly nature. You still have the creepy crawlys in a crawl space, but you are less likely to see them.