Open Rafter Tails and Venting – GreenBuildingAdvisor

Hi everyone,

We are continuing to remodel one of our outbuildings into an office/ADU. The ceiling will be vaulted in this building.

I am pretty confused on how to vent this. I saw a 2015 thread on here where it was suggested to install either 2 inch round vents or to use a piece of U shaped perforated flashing. The second idea appeals a lot more to both me and my wife but I cannot wrap my head around the detail. 

That post suggested to cut the blocking between the rafter 1 1/2 inch short and install the perforated flashing there. I am having trouble visualizing exactly what that means. If anyone has any input it would be extremely appreciated.

Thanks!

Jay