To: "permaculture" <permaculture@lists.ibiblio.org>
Subject: Re: [permaculture] Whitewash for roofs?
Date: Mon, 8 Aug 2011 16:51:53 -0500
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).
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.