Yes. Wood rot is a fungus that forms when wood is filled with moisture. Unfortunately, even when the wood is “dry” again, the fungus can continue to live and break down wood. However, keeping wood dry in the first place ensures that wood rot never forms. Make sure to replace any rotted beams in your crawl space. Then, invest in crawl space encapsulation which will permanently protect your crawl space from moisture and keep wood dry. In doing so, you stop wood rot from forming ever again.