What to seal/cover Eaves gap into workshop roof (PIC)

[kujina]

I'm currently building a shed/workshop out of 4x2.

I plan on using 50mm kingspan type stuff in the ceiling. In the photo below you can see the gaps just below the roof/above the wall, should I cover those thin rectangular gaps completely with wood or use something that will allow some air flow in?

 

[masona]

I'm guessing that you're going to have a fascia board, if so, then a soffit vents under the 4"x2" joists.

 

[kujina]

Thanks for the reply Masona, I think I will fix some thin ply up there cut holes for Circular Soffit Vents between each 4x2, what do you think?

 

[masona]

That's okay but have a look at Continuous Soffit Vents with a mesh to keep insects out, the more ventilation the better