What this video covers
The clip covers a crawl space nobody had entered in eight years.
No vapor barrier, standing water on the ground, and floor joists that had gone from surface staining to compromised structure. None of it was visible from inside the house until the floor above began to feel wrong.
The takeaway
Crawl spaces fail silently because nobody looks. An annual inspection with a torch is the entire preventative measure, and it is the difference between a barrier install and a structural repair.
Read the full written guide: Crawl Space Mold Removal.