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approtech - Re: [approtech] [permaculture] Building insulation (posted to the Appropedia FB page)

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Subject: Appropriate Technology

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  • From: "Lawrence F. London, Jr." <venaurafarm AT bellsouth.net>
  • To: permaculture <permaculture AT lists.ibiblio.org>, Appropriate Technology <approtech AT lists.ibiblio.org>
  • Subject: Re: [approtech] [permaculture] Building insulation (posted to the Appropedia FB page)
  • Date: Fri, 22 Oct 2010 06:46:41 -0400

On 10/22/2010 6:35 AM, Lawrence F. London, Jr. wrote:
(posted to the Appropedia FB page and the approtech list which is
mirrored at the approtechnology blog, approtechnology.blogspot.com)
<>
I have direct experience with several types of insulation, having paid
to have them installed in buildings on my property. I will try to post
some useful feedback asap. Basically it consists of a list of preferred
types of material:
1) nontoxic, nonflammable, waterproof, UVresistant, hard setting i.e.
structural Spray-On Foam Insulation: Icynene and Demilec are two brands
I am familiar with.
2) Rigid foam board insulating panels, nontoxic, nonflammable,
in pressure strengths of 150psi to 600 psi. Brands include: CavityMate
(blue) and Foamular (pink) from Dow, Corning, DuPont(?). Available sizes
nclude 2'X8' and 4' scred)X8'
3) AAC Block, aerated, autoclaved concrete block. Brands include: Hebel
and Aercon. Sizes and strengths: many sizes of panels, steel reinforced
and blocks, different widths and lengths for load-bearing (with steel
reinforced poured concrete beam as top course on walls) and non
load-bearing walls (i.e. as cavity wall insulation, Ex.: between
exterior and interior load-bearing concrete block or brick walls.

I have used 1), 2) & 3).

Forgot a detail about 2): the material comes in thicknesses ranging from
1/2" to 2" in pressure strengths from 150 psi to 600 psi.
As for other insulating options there are a number of types of thin panels (less than 1/2") that come in flexible rolls in varying widths and semi-flexible folding panels and are either unfaced or faced with a
bonded aluminum foil backing; insulating material is either Cavitymate or Foamular in the unfaced or some other type of closed cell flexible foam insulation in the other.




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