[Greenbuilding] roof material for rain harvesting

[Nick Pyner]

Oops. God only knows what slipped up there..

http://www.bluescopesteel.com.au/files/dmfile/CTB25june2008.pdf


You will find a great swag of material at

 http://steelproducts.bluescopesteel.com.au/home/technical-library

including this


http://steelproducts.bluescopesteel.com.au/files/TB-3.pdf




Nick Pyner

Dee Why   NSW

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-----Original Message-----
From: Greenbuilding
[mailto:greenbuilding-bounces at lists.bioenergylists.org]On Behalf Of
candtcampbell at juno.com
 neither humans nor vegetables require dietary aluminum, and some say it's
actually toxic to humans. So I'd still like to find plain galvanized.
However, I'm not going to be bending pans myself, and am reluctant to seek
someone to do it for me, so would like to find this on the open market. If I
have to use exposed fasteners, then I have to deal with leaching from
neoprene, and I don't know whether that's worse than eating aluminum.

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I submit this is getting a bit precious. If you are worried about leaching
from the neoprene washers, it's definitely time to start worrying a bit more
about all that radioactive caeseum flying over from Japan and settling on
your roof - not to mention the mercury spewed out by American coal-fired
powerstations.

Having said all that, TB-3 above is about aquaplate, a food-grade poly
lining to zincalume tanks, i.e. potable water storage, while the CTB25 is
more about water collection. I don't know much about aquaplate. This is
mainly because I work in a metropolitain area, would never specify rainwater
tanks for potable water storage, and always call for tanks made entirely of
food-grade poly anyway, simply because they are more or less de rigeur and
usually a better deal.