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White mold in crawl space.
Inspected a house yesterday built in 1945. As you can see by the pictures, there was white mold in various places in the crawl space. What is perplexing is that it is only on the plywood not the joists. It is a dry mold. The crawl space was extremely dry to the point that the soil was like powder. There was not a vapor barrier and it had good ventilation but it appeared that the mold was forming near the ventilation vents. I am thinking that this mold is dry because of the winter climate and reactivates itself once it gets hot and the humidity levels rise.
I need help in identifing the problem as well as why it is not on the joists.
Thanks,
Jim
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