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The first step was a full crawl space insulation removal. Every piece of that deteriorated material came out. It had to. You can't build a clean, protected space on top of a mess like that. Getting down to bare ground is the only way to do this correctly.
Once it was cleared out, we installed a heavy-duty vapor barrier across the entire floor and up the walls. The liner is sealed tight and wrapped around every pier column - no gaps, no shortcuts. That barrier is what physically stops ground moisture from rising up into the structure of the home. It's the foundation of a properly encapsulated crawl space.
To keep humidity levels in check long-term, we finished the job with a dedicated crawl space dehumidifier. Down here on the Gulf Coast, humidity doesn't take a break - and neither should your moisture control system. A dehumidifier like this keeps the space actively conditioned, which protects your floor joists, your subfloor, and the air quality inside your home.
The difference between the before and the after on this one is hard to overstate. What was a dark, damp, insulation-covered mess is now a clean, sealed, and controlled environment. That's what proper crawl space encapsulation looks like when it's done right.