"These photos are from a home we inspected that was built in 2009. You would think that because it's newer construction the home would be a good shape. Well, this should give you a better understanding of how damaging water leaks can be if they go undetected. Nearly the entire subfloor is rotted from water damage and multiple joists are hanging down from rot.

It took less than a decade for this to occur, so not all homes with significant damage are 100 years old.

Large puddles of water had to be avoided during the crawl as well. (Image 3)

Here you can see two joists hanging down after snapping in half from water damage. (Image 4)

This is probably the nastiest of all the damage. That is not paint. It's possible that the entire subfloor needs to be replaced. (Image 5)"