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permaculture - Re: [permaculture] Whitewash Bob's Roof Day plus Mapping/data site find story on white roofs impacts

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  • From: "John D'hondt" <dhondt@eircom.net>
  • To: "permaculture" <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Whitewash Bob's Roof Day plus Mapping/data site find story on white roofs impacts
  • Date: Thu, 19 Jul 2012 00:14:18 +0100

Another version might be lime + milk (actually early cottage cheese, milk gone sour that is releasing the whey. What you need is caseine) We have found this very hard wearing and heavy-rain resistant as lime and water is definitely not.
john

We had several last-minute glitches we have not gotten this
done. The first problems were rain, as we had an unusually wet June.
Then we had a hard time actually finding hydrated (slaked) lime. None of
the usual suspects I had access to (Lowes, Home Despot, Ace Hardware)
stock it anymore. I have now tracked down some (from a tack shop) and
will do a fence and then we will see about doing the roof. I am doing
the fence first to try out two or three different formulations for
whitewash, as there are lots of recipes out there. I am going to try one
version that is only lime and water, another with some salt added, a
third with salt added plus letting it sit overnight before using it. A
chemist friend says that the effect of the added salt and letting it sit
is to make it easier to apply, but the cost is some of the whiteness.
So we will try a fence before we do the whole roof.

Bob Waldrop, OKC

On 7/18/2012 10:05 AM, Ken Morneault wrote:


Hi Bob,

Any feedback on the performance of the whitewash yet?

Regards,

Ken



________________________________
From: Bob Waldrop <bwaldrop@cox.net>
To: ROE2 <runningonempty2@yahoogroups.com>; permaculture <permaculture@lists.ibiblio.org>
Sent: Friday, April 27, 2012 9:34 PM
Subject: [permaculture] Whitewash Bob's Roof Day plus Mapping/data site find story on white roofs impacts

Whitewash Bob’s Roof Day is coming up June 2, 2012, this is a free workshop at my house in OKC, where we will whitewash my roof.

For info on the benefits of white roofs, see . . .

http://www.builditsolar.com/Projects/Cooling/WhiteRoofExperiment/WhiteRoof.htm

For info on the whitewashing of roofs, a very cheap way to get a white roof, see. . .

http://www.theatlanticcities.com/design/2012/04/just-fraction-more-white-roofs-could-have-huge-global-impact/1764/

There’s also a thread in the archives of this group from last year.

Anyone in the neighborhood is welcome to stop by. Let me know you’re coming by email to bwaldrop@cox.net or by signing up with the FB event,
https://www.facebook.com/events/286135491467827/ .

I am also participating in an experiment that will apply a non-toxic coating after the whitewash has cured. The goal is to extend the life of the whitewash from 2-3 years to 8-9 years.

A full report will be written and posted.

Bob Waldrop, OKC
https://www.facebook.com/prairierosepermaculture




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