Cob: Perforated pipe sleeves

[Amanda Peck]

The guy working for me said that those sleeves were more of a nuisance than 
anything else, especially with the silt that was likely to be washing down 
to it at my site.  He recommended and given his reasoning I agreed that we'd 
forget it.  A layer of straw is a reasonable alternative, at least if you 
have the pipe on the side of the foundation, not under it.  And I think that 
the rolls are mostly for septic tanks--with slits to let water OUT 
slowly--the sticks are for drainage, put hole side up.

here's a link, primarily from an existing foundation point of view:
http://www.askbuild.com/cgi-bin/printcolumn?070

...............
We are building a log duck house with a RTF.  I was wondering if anyone can 
help us out.  When I went to look at perforated pipe it was pretty 
reasonable, but the cloth covering more than doubled the price.  The guy at 
home depot said it really doesn't matter if we use it or not since it is 
pretty dry here in Northern New Mexico (although we live at 7500 ft and the 
shed is on the north side where we have quite a bit of snow sitting all 
winter).  I was wondering if I could just cover it in a regular bed sheet?  
Or is there something else that is cheap and easily obtained? Can we just 
skip the covering altogether?  Thanks,
Vivian

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