[Cob] Roofing question & thoughts

[charner at charner.org]

Wood shakes and shingles are good for about 15-25 years
but you will also need underlayment (most likely asphalt
based felt).  I like a 5v crimp metal roof (galvanized finish
unpainted) for water catchment... also inexpensive.
As far as material sustainability it's hard to beat thatch
or a vegetated roof.  It will be hard to find someone who can
thatch in the US unfortunately.

Asphalt shingles will not be good for clean water catchment btw.

-CR

Quoting phil <philhawnnc at excite.com>:

>
> EPDM, asphalt shingles and the like are petroleum products and if   
> you are concerned about future cost and replacement then you need to  
>  steer clear of anything made with petroleum by-products. You might   
> consider a wood shake of some sort. If pitched properly it will shed  
>  water and last as long as or more than asphalt shingles. If you can  
>  find someone that thatches you should consider that too. Cob house   
> and thatch roof, they go together.
>
>
>
>
>
> Phil
>
>
>
>  --- On Wed 11/14, drub < drub at pobox.com > wrote:
>
> From: drub [mailto: drub at pobox.com]
>
> To: coblist at deatech.com
>
> Date: Wed, 14 Nov 2007 20:41:14 -0800
>
> Subject: [Cob] Roofing question & thoughts
>
>
>
> In the scheming stage.  Looking forward to real cobbing next   
> summer.Am thinking of the roof design.  Have seen pictures of   
> several cob houses with fairly flat roofs.  Gotta believe a membrane  
>  was used.  Some have been planted.    * What kind of membrane was   
> used?  Conventional roofing membrane?       Some sort of swimming   
> pool product?    * Is a membrane a good, long term choice?  As   
> materials become more      expensive and less available, will this   
> sort of membrane be      serviceable in future years of depletion?    
>   * Would a conventional asphalt shingle be a better, more   
> sustainable      choice?  It would likely be more available.  True?   
>    * What other materials should be considered?  Tiles?Thanks for   
> your   
> thoughts,David_______________________________________________Coblist  
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