Re: [practical-sbc] Aerogel Render/Plaster developed in Switzerland
- Thanks for the compliments, Ben.
I didn't check, but I believe this Swiss rendering material will have been tested to some kind of ASTM or ISO standard, since part of the team developing it is the Swiss Materials laboratory. These would be engineering folk who dot their i's and cross their t's properly.
I hadn't heard about an aerogel 'tape' before. I wonder if anyone has tried an aerogel/rigid foam panel. That might be useful--if it doesn't cost 3 prices.
From: Ben Polley <ben@...>
To: firstname.lastname@example.org; Chris Green <pojeros@...>
Cc: SB-r-us <SBemail@example.com>; Practical SBC <firstname.lastname@example.org>
Sent: Wednesday, August 22, 2012 7:18:44 AM
Subject: Re: [practical-sbc] Aerogel Render/Plaster developed in Switzerland
We had clients who were interested in a US made aerogel product that
is formed into strips of "tape", intended to be installed between
typical framing studs and interior wall sheathing to act as a thermal
I can't recall whether it was practical reasons (Code, price,
availability or other) or skeptisism (lack of ASTM or similar standard
tests to confirm performance under particular conditions) that led us
to not pursue it further but I am interested to see similar products
being used for such a totally different application.
Thanks for all of the stuff you throw on to the list for everyone
Chris. I am always keen to read your postings.
Quoting Chris Green <pojeros@...>:
> Next to an absolute vacuum, areogel (------------------------------------
> or "Solid Smoke") has the lowest thermal conductivity
> value. It comes out at the equivalent of R-10 per inch.
> from this
> is 5% silica, 95% air, and was until recently, the lightest material
> on earth.
> A company in Switzerland, Fixit AG, and EMPA, the
> Swiss Federal Laboratory for Materials Science, have developed a
> render/ plaster that incorporates aerogel powder into its
> plaster mixture.
> Their figure is that the plaster has a thermal
> conductivity of 27mW/(m.k) , which appears to be a fairly high
> R-value per inch. Better than styrofoam panels, at least.
> I haven't worked out how to actually convert this 27mW/(m.k) figure
> accurately yet. I got r-37, which is obviously wrong.
> somebody here can enlighten me.
> This plaster can be applied
> with a sprayer, as shown in the press release, or troweled on.
> is sprayed on with a professional rendering machine and then smoothed
> out. In the next step the soft render will have to be protected with
> a tough surface layer. "
> is EMPAs press release (in English) about this
> AG home page: In German and French.
> There may be some value in including this plaster when rendering a
> straw bale house. Or maybe not. Time will tell. This product will be
> coming into the market sometime in 2013.
> Chris Green.
> [Non-text portions of this message have been removed]
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