Cob: Questions about wool- air gap venting in roof

[Taylor Publishing-DirtCheapBuilder]

 On  Uncleaned wool:  In his 
experience, the stuff can sit around forever unwashed and be 
ignored by pests, for whom the sheepiness is simply 
overwhelming. 
+++++++++

WOW David, you made my day...I keep looking a this huge bag of dirty fleece I have with the  slowly receding "odaire'du ewe"  and see no moths, etc and am happy to report even the field mice aren't stealing bits of it!  

So If I get around to washing it I would love to use it in the ceiling of my studio...one caveat, I am aware there must be an airgap between the insulation (of any type) and the underside of the roof ceiling..I  Journal of Light Construciton saw some "baffles" of material that let  about 1/2" to 1" of space remain, ensuring ventilation.

I was wondering if simple  sturdy cardboard  could be bent at edges to allow the same venting? then stapled to the rafter sides, etc. My other idea was rolled/bunched up netting that would take up some "space" buffering the insualtion from touching the roof underside, but allow air thru.  Any opinions?

Ms. Charmaine  Taylor/ Taylor Publishing
http://www.dirtcheapbuilder.com    http://www.papercrete.com
PO Box 375, Cutten (Eureka) CA 95534 707-441-1632     tms at northcoast.com