My living room, dining room and kitchen are above a cinder block wall, concrete floor crawl space that is about 4ft high. I live in a damp area and the crawl space frequently gets water in it. There are 3 doorways (kitchen to dining room, kitchen to living room, slider to deck) that have developed cracks in them. These cracks start at the upper corner(s) of the doorway and either go straight up or at a 45 degree angle from the corner of the door. I'm guessing that this is due to settling (house is about 25 years old) made worse by the water in the crawl space and the wet ground around the house. Something tells me I might be looking at a major repair here. Any comments or suggestions would be appreciated. I already contacted one of those 'b-dry' companies, but they won't even work in crawl spaces due to more frequent worker injures.