Additional question about air gap in cathedral ceiling

[calvin82]

Can't find a really good answer in the forum so here we go:

I'm in the process of drawing up a small cabin.

Roof construction (from outside to inside)

Shingles
Roofing felt
Råspont
Ventilation space 34mm
220mm stone wool
Sparse
Tongue and groove

No vapor barrier since we will keep the cabin unheated for longer periods.
Will the ventilation work (from eave to eave)? And is 34mm appropriate or maybe it works with less?

 

[calvin82]

I should add that it's just a sketch, the ventilation comes to life with the wall frame haha

 

[calvin82]

Have thought further myself. It has to work considering the limited use at the cabin.
Might use a slightly lower stilt, possibly 22mm (mostly to use some timber I already have).