posted by Austin .
11. Structural failure in a roof may be due to
A. the presence of a vapor barrier between the attic floor and the ceiling below.
B. too little span between supporting members.
C. cuts made in rafters or trusses for addition of components such as stairways and fans.
*D. use of dried wood for structural members.
KD or Kiln Dried wood is premium material, unlikely to be the cause.
You are the inspector, the builders fear you because you may find their shortcuts.