shed insulation and air space

[tawnyman]

Hi there, I'm looking to insulate my t&g shed and have spent a few weeks getting confused over the exact way to do this. The ceiling is sorted in my mind, I'll be putting soffit vents in to give airflow over the insulation (kingspan or rockwool type -not sure yet) but I'm not quite clear about the airgap on the outer side of the wall insulation. I'm guessing that this airspace needs a vent somewhere to help circulate back out. Top or bottom of the exterior? If it helps, it's a 7x12 shed that I'll be using as a workshop, I'll be cladding the inside with plywood. What are peoples experiences please,
thanks
julian

 

[^woody^]

You wont need any air gap, the timber cladding each side will breath