Roof
1. Boise 11 7/8" BCI 90 2.0  roof joists 16" centers 12' span - max. load 225 lb per lineal foot.
2. 18'  Firing strips tapered 1/4" to 1' Doug fir 1 1/2" wide
3.  3/4" TG OSB sheathing.
4. 4. Built up composite roof.
5. R 38 fiber glass insulation between joists - reflector down. 
6. 3 Tube skylight - Bathroom - laundry room - living room
7. 2" vent holes 16" OC in rim board  under gutters
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<  Drip
  Built up roof  >
Gutter
 1 3/4  X 11 7/8     >
  Versi-lam Rim
3/4 OSB Sub-floor >
Vent stack 24" X 24" X 3' high  >
< 16" X 16" Vent
11 7/8 BCI Joist
R-38 Insulation
< 2"  Vent  16" OC
< Tube skylight  >
  Ridge vent  >
 2" X Doug fir  1/4" to 1' slope >