Cob: Questions about wool- air gap venting in roof

[David Atmoweg]

It's always nice to make someone's day.

In my (again, vey limited) experience, I would guess that cardboard 
would stand a good chance of functionig well under those 
circumstances, sine one of wool's ninety-three great qualities is 
that it absorbs, retains and slowly evaporates moisture, so the risk 
that cardboard would waterlog and fail would seem to be reduced.
The caveat is that if you wash the wool well, it'll lose some of its 
inherent pest-resistance.  But our borate-treated stuff seems to be 
doing fine, and we have no shortage of moth and mouse activity in 
our gappy old cabin.
I neglected to mention earlier, by the way, that we're also using 
wool in our bathroom insulation, for the above reason, instead of 
light-clay.  Furthermore, when we replace our old wood stove this 
year, we're putting wool behind our new fire wall, since it doesn't 
burn, and I would think that might balance some fire risk 
associated with cardboarding your ceiling.

-d.
 

---
> 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
>   
> 
> 
> 




ps - please note the new, improved, but rather prosaic new email 
address:
         daupo at localnet.com

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