According to the International Energy Conservation Code (IEEC), you are in Zone 4a --warm, humid, moist.
The Code minimums are:
Substituting spray foam insulation (spf) for fg of the same R value will provide an improvement because, applied carefully, it will eliminate gaps and cracks in the walls that typical batt insulation creates.
Basement perimeter at foundation R-20 fiberglass batt
Surprised to see that's still being done.
The preferred method, as described by Building Science Corp., is spf in the rim joist area. Another approach is XPS (extruded polystyrene foam board) sealed with handheld sprays. But whether a production builder will change its method for an informed homebuyer is another matter.
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steps are painted lime bright green
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