permaculture

["Bob Waldrop" <bwaldrop@cox.net>]

This is really interesting, I hope you are able to contact the author, I 
didn't notice an email on the page.  I'm also wondering, if it does wash 
off, of the consequences for my soil.  Reduce acidity I guess. . .

Bob Waldrop


-----Original Message----- 
From: Ken Morneault
Sent: Monday, August 08, 2011 4:27 PM
To: permaculture
Subject: Re: [permaculture] Whitewash for roofs?



A very intriguing idea....I have a vaulted ceiling that I'd like to better
insulate against summer heat but haven't due to have to redo
the insulation / re-sheetrock (unless someone has a better suggestion).


Here is a posting I found that sounds promising:

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

I may contact David to see how the whitewash is holding up a year later.

Regards,

Ken
Georgia


________________________________
From: Bob Waldrop <bwaldrop@cox.net>
To: permaculture <permaculture@lists.ibiblio.org>
Sent: Monday, August 8, 2011 2:33 PM
Subject: [permaculture] Whitewash for roofs?

The energy savings of white roofs appear to be well substantiated. But 
painting your roof can be expensive.

There is however a lower cost way to achieve whiteness and that is 
whitewash. Here’s basic info from wikipedia on the subject. 
http://en.wikipedia.org/wiki/Whitewash . The goal of course would be to 
achieve the energy savings available from white roofs at a lower cost than 
conventional paints, even though it would have to be reapplied every few 
years.

I was wondering if anyone had had any actual experience with this. In 
particular, I’m curious about how whitewash would adhere to asphalt 
shingles. If this would work, it could be a boon to low income communities 
everywhere.

Bob Waldrop, Oklahoma City
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