This is a question that I've wondered about for a while. When you come
out of the wizard, an UF material is created for each zone(like below),
with different properties for each zone - with an amazing variation in
properties across the board. Does anyone know why? Is it reasonable to
assign one material to all of them (assuming they are the same
construction and sitting on the same soil), and if so, how do I know
which material to pick out of the 20+ construction assemblies created?

Vikram Sami, LEED AP