The "crawl" space is 5 feet in height ... (framing, concrete slab, plumbing pipes, and insulation), leading to deterioration or potential mold and mildew growth.

Q - I am starting to build a new house. Would you build a house today on a slab or over a crawlspace? -Ronnie in Tucker A - Since you are asking me, I will tell you what I would do. I would build ...

The concrete slab and floor are less obvious. Keep in mind that concrete is a porous material, so moisture will readily pass through it. Start with the crawl space.