Signs of moisture problems in a vented crawlspace:

• Damp, musty odor
• Water stains on foundation
• Efflorescence on block/concrete walls (white crystalline or powdery, fluffy/fuzzy deposit on the surface of masonry.)
• Rust on exposed metal parts.
• Black discoloration on wood.
• Dirty, dripping fiberglass insulation (There may be a technical term for this that I?m not aware of)
• Water dripping from duct work or insulation
• Standing water-puddles or wet marks on the concrete floor or on top of the plastic vapor barrier.
• Cold damp sand/dirt,

Now that you understand how moisture in your crawlspace caused your wood floors to cup or buckle, the next step is to remove the source of moisture by sealing the crawlspace.  Next Page

Reference Advanced Energy for sealed crawl space instructions.Your flooring professional may assist you with repair of your cupped or buckled floor.