Pier and beam foundations come in many flavors.
Advantages of crawl space is the ability to get to utilities for service under the floor.
Pier and beam construction does present its own set of problems including proper ventilation, keeping the crawlspace dry by using extra drainage precautions, possibility of wood rot and mold, as well as, keeping the perimeter beam stable.
Besides it being very unpleasant in most crawl spaces to view the problems, it is usually difficult getting materials into the crawlspace and often necessitates cutting holes in the floor to bring in materials and perform the repairs. This has caused the majority of North Texas foundation repair companies to either discontinue working on pier and beams, charging very high prices for the inconvenience or handling it in a less than competent way.
Some of the more common problems found in crawl space construction: