Hi. We bought a 1939 home in tennessee last year, where it is pretty humid. The house has a recent (2006) master bedroom addition on the ground floor and a crawlspace/storage area underneath its floor. We don't use the crawl space at all. Over the weekend I opened the door to the crawlspace to store some items and found what appears to be yellow mold or slimy stuff in several places on the wood boards that cover a cement slab. Not sure why the wood boards are there (I assume previous owner put them down because the cement is rough and this provided cleaner storage space).
The crawlspace has a partial dirt floor and it is very humid.
Do I just wash off the mold (if that's what it is)? Rip up the wood planks and leave the cement slab? Do I need a more permanent solution to address the humidity level?
Any help or suggestions appreciated. I zipped some photos and can provide more if useful.