[Cob] Eco Roofing Material

[john fordice]

Hi Bill,
I'm thinking a corrugated metal roof set on sleepers elevated above your structural roof, with bug screened vented eaves and ridge.  The idea being to create a venting area between the metal roof and the wood structure.  This venting will reduce heat build up in the roof.   While metal is not so green/Eco, the fire issue is the biggie.  Further I'd consider keeping the roof projection framing to the sleeper system only & adding a one hour protection to the edge of your main 2x6 rafter framing at the exterior of your walls - reduce combustability of the eaves as much as you can …… again as a fire protection.  Assuming you will have ample roof insulation too.
Careful furring of the sleeper system will plane out the roof and make installing the metal roofing a slam dunk. 

john fordice

On Oct 1, 2014, at 8:07 AM, Bill Wright, L.Ac., DNBAO wrote:

> 
> 
> Hi Everyone, 
> 
> I sent out this email, "Any suggestions for
> green/Eco roofing material?" 
> 
> Adam Weismann Responded, "In what
> context?" Great question Adam! Thank you! 
> 
> To which I will add: 
> 
> I'm
> building a simple gable end round wood timber framed structure w/
> bale-cob walls, and a South facing Cob, "solar wall". It has a 8:12
> Pitched roof. We live in foothills of the Sierra Nevada Mountains in
> Northern California at approximately 2500 feet. We live mostly below the
> snow line, although we can expect a few days of snow each year. The most
> snow I've seen at one time is 6-8"; though I wouldn't want to bet on how
> the climate will show up in our current trajectory. Our biggest
> climactic issue is brush fires, and local building codes dictate fire
> resistant roofing materials, so thatch is out.  
> 
> The building is
> designed with passive solar in mind, so it has quite a bit of solar
> exposure. That means I would like a roofing material that won't cause
> considerable heat gain in the heat of our long, dry, hot summers. 
> 
> The
> roofing substrate is 5/8" thick OSB Plywood fastened to 2x6" Doug Fir
> lumber. However, the 2x6" framing is fastened to round wood timber
> framed rafters, giving the roof some undulation - dips and humps as the
> roof transits from gable end to gable end; from ridge to eve the roof
> planes pretty straight and flat. 
> 
> That's about all the context I can
> think to add in the moment.  
> 
> This moment is a gift. Enjoy... 
> 
> Bill
> 
> 
> -- 
> 
> Bill Wright, L.Ac., DNBAO 
> 
> Wright Acupuncture and Massage 
> 
> 251
> Auburn Ravine Rd., Ste. # 205 
> 
> Auburn, CA 95603 
> 
> 530-886-8927
> 
> 
> http://www.auburnacupuncture.net 
> 
> This e-mail and any attachment is a
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> 
> 
> On Tue, 30 Sep 2014 07:32:07 +0100, Adam Weismann wrote: 
> 
>> Hi Bill
>> 
> 
>> In what context?
>> 
>> Thanks
>> 
>> On 30/09/2014 04:58, Bill Wright
> L.Ac. wrote: 
>> 
>>> Hi,
>>> Any suggestions for green/Eco roofing
> material?
>>> Thanks,
>>> Bill
>>> 
>>> Sent from my iPhone
>> 
>> -- 
>> 
>> 
> ADAM WEISMANN - Director 
>> [1] 
>> www.clay-works.com [2] 
>> 01326 341
> 339 
>> 0778 978 0391
> 
> 
> Links:
> ------
> [1] http://www.clay-works.com
> [2]
> http://www.clay-works.com
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