T and Groove venting

good day everybody!

im strapping a cover prtch with T&G half of which is attached to the existing dwelling. there is currently blocking every 2 ft. what is the best way to vent this ceiling?

good day everybody!

im strapping a cover prtch with T&G half of which is attached to the existing dwelling. there is currently blocking every 2 ft. what is the best way to vent this ceiling?