[Greenbuilding] [BULK] FW: Aerated Autoclaved Concrete

[Jeannie Babb Taylor]

Alan, the 1.2 per inch does not take thermal mass into account.

Jeannie


-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Alan Abrams
Sent: Tuesday, February 05, 2008 2:50 PM
To: 'Greenbuilding'
Subject: Re: [Greenbuilding] [BULK] FW: Aerated Autoclaved Concrete

<The secret to AAC is the aerated part--filled with trapped air, the blocks
create a nice tight envelope, it's very lightweight compared to CMU, so has
a lower emboddied energy than most CMUs>


we've looked into this a few times too.  Rumors seem to waft by that a new
plant will open nearby soon, or an old plant closed down, etc.  that sort of
uncertainty, plus the cost and embodied energy of transportation for
relatively small quantities always seem to wind up as major limiting
factors.  also, I've read that the r-value of AAC is something like
1.2/inch, which we can more than double with good 2x6 construction.

Alan Abrams AIBD
Washington DC
www.abramsdesignbuild.com

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